| 1 | /* ======================================================================== *\
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| 2 | !
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| 3 | ! *
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| 4 | ! * This file is part of MARS, the MAGIC Analysis and Reconstruction
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| 5 | ! * Software. It is distributed to you in the hope that it can be a useful
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| 6 | ! * and timesaving tool in analysing Data of imaging Cerenkov telescopes.
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| 7 | ! * It is distributed WITHOUT ANY WARRANTY.
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| 8 | ! *
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| 9 | ! * Permission to use, copy, modify and distribute this software and its
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| 10 | ! * documentation for any purpose is hereby granted without fee,
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| 11 | ! * provided that the above copyright notice appear in all copies and
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| 12 | ! * that both that copyright notice and this permission notice appear
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| 13 | ! * in supporting documentation. It is provided "as is" without express
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| 14 | ! * or implied warranty.
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| 15 | ! *
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| 16 | !
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| 17 | !
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| 18 | ! Author(s): Thomas Bretz 12/2000 <mailto:tbretz@uni-sw.gwdg.de>
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| 19 | ! Author(s): Harald Kornmayer 1/2001 (harald@mppmu.mpg.de)
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| 20 | !
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| 21 | ! Copyright: MAGIC Software Development, 2000-2002
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| 22 | !
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| 23 | !
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| 24 | \* ======================================================================== */
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| 25 |
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| 26 | /////////////////////////////////////////////////////////////////////////////
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| 27 | // //
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| 28 | // MImgCleanStd //
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| 29 | // //
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| 30 | // This is the standard image cleaning. If you want to know how it works //
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| 31 | // Please look at the three CleanSteps and Process //
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| 32 | // //
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| 33 | // FIXME: MImgCleanStd is not yet completely optimized for speed. //
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| 34 | // Maybe we don't have to loop over all pixels all the time... //
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| 35 | // //
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| 36 | // Input Containers: //
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| 37 | // MGeomCam, MCerPhotEvt //
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| 38 | // //
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| 39 | // Output Containers: //
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| 40 | // -/- //
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| 41 | // //
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| 42 | /////////////////////////////////////////////////////////////////////////////
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| 43 | #include "MImgCleanStd.h"
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| 44 |
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| 45 | #include <stdlib.h> // atof
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| 46 | #include <fstream.h> // ofstream, SavePrimitive
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| 47 |
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| 48 | #include <TGFrame.h> // TGFrame
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| 49 | #include <TGLabel.h> // TGLabel
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| 50 | #include <TGTextEntry.h> // TGTextEntry
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| 51 |
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| 52 | #include "MLog.h"
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| 53 | #include "MLogManip.h"
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| 54 |
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| 55 | #include "MParList.h"
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| 56 | #include "MGeomPix.h"
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| 57 | #include "MGeomCam.h"
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| 58 | #include "MCerPhotPix.h"
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| 59 | #include "MCerPhotEvt.h"
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| 60 |
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| 61 | #include "MGGroupFrame.h" // MGGroupFrame
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| 62 |
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| 63 | ClassImp(MImgCleanStd);
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| 64 |
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| 65 | enum {
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| 66 | kImgCleanLvl1,
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| 67 | kImgCleanLvl2
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| 68 | };
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| 69 |
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| 70 | static const TString gsDefName = "MImgCleanStd";
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| 71 | static const TString gsDefTitle = "Task to perform a standard image cleaning";
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| 72 |
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| 73 | // --------------------------------------------------------------------------
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| 74 | //
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| 75 | // Default constructor. Here you can specify the cleaning levels. If you
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| 76 | // don't specify them the 'common standard' values 3.0 and 2.5 (sigma
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| 77 | // above mean) are used
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| 78 | //
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| 79 | MImgCleanStd::MImgCleanStd(const Float_t lvl1, const Float_t lvl2,
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| 80 | const char *name, const char *title)
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| 81 | : fCleanLvl1(lvl1), fCleanLvl2(lvl2)
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| 82 | {
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| 83 | fName = name ? name : gsDefName.Data();
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| 84 | fTitle = title ? title : gsDefTitle.Data();
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| 85 |
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| 86 | Print();
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| 87 | }
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| 88 |
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| 89 | // --------------------------------------------------------------------------
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| 90 | //
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| 91 | // This method looks for all pixels with an entry (photons)
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| 92 | // that is three times bigger than the noise of the pixel
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| 93 | // (std: 3 sigma, clean level 1)
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| 94 | //
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| 95 | //
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| 96 | // AM 18/11/2002: now cut levels are proportional to the square root
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| 97 | // of the pixel area. In this way the cut corresponds to a fixed
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| 98 | // phe-density (otherwise, it would bias the images).
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| 99 | //
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| 100 | // Returns the maximum Pixel Id (used for ispixused in CleanStep2)
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| 101 | //
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| 102 | Int_t MImgCleanStd::CleanStep1()
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| 103 | {
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| 104 | const Int_t entries = fEvt->GetNumPixels();
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| 105 |
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| 106 | Int_t max = entries;
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| 107 |
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| 108 | //
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| 109 | // check the number of all pixels against the noise level and
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| 110 | // set them to 'unused' state if necessary
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| 111 | //
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| 112 | for (Int_t i=0; i<entries; i++ )
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| 113 | {
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| 114 | MCerPhotPix &pix = (*fEvt)[i];
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| 115 |
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| 116 | const Float_t entry = pix.GetNumPhotons();
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| 117 | const Float_t noise = pix.GetErrorPhot();
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| 118 |
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| 119 | const Int_t id = pix.GetPixId();
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| 120 |
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| 121 | const Double_t ratio = fCam->GetPixRatio(id);
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| 122 |
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| 123 | // COBB: '<=' to skip entry=noise=0
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| 124 | if (entry <= fCleanLvl1 * noise / ratio)
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| 125 | pix.SetPixelUnused();
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| 126 |
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| 127 | if (id>max)
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| 128 | max = id;
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| 129 | }
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| 130 | return max;
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| 131 | }
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| 132 |
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| 133 | // --------------------------------------------------------------------------
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| 134 | //
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| 135 | // check if the survived pixel have a neighbor, that also
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| 136 | // survived, otherwise set pixel to unused. (removes pixels without
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| 137 | // neighbors)
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| 138 | //
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| 139 | // takes the maximum pixel id from CleanStep1 as an argument
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| 140 | //
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| 141 | void MImgCleanStd::CleanStep2(Int_t max)
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| 142 | {
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| 143 | const Int_t entries = fEvt->GetNumPixels();
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| 144 |
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| 145 | //
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| 146 | // In the worst case we have to loop 6 times 577 times, to
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| 147 | // catch the behaviour of all next neighbors. Here we can gain
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| 148 | // much by using an array instead of checking through all pixels
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| 149 | // (MCerPhotEvt::IsPixelUsed) all the time.
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| 150 | //
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| 151 | Byte_t *ispixused = new Byte_t[max+1];
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| 152 | memset(ispixused, 0, max+1);
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| 153 |
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| 154 | for (Int_t i=0; i<entries; i++)
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| 155 | {
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| 156 | MCerPhotPix &pix = (*fEvt)[i];
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| 157 | ispixused[pix.GetPixId()] = pix.IsPixelUsed();
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| 158 | }
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| 159 |
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| 160 | for (Int_t i=0; i<entries; i++)
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| 161 | {
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| 162 | //
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| 163 | // get entry i from list
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| 164 | //
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| 165 | MCerPhotPix &pix = (*fEvt)[i];
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| 166 |
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| 167 | //
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| 168 | // check if pixel is in use, if not goto next pixel in list
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| 169 | //
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| 170 | #if 0
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| 171 | if (!pix.IsPixelUsed())
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| 172 | continue;
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| 173 | #endif
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| 174 |
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| 175 | //
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| 176 | // get pixel id of this entry
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| 177 | //
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| 178 | const Int_t id = pix.GetPixId();
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| 179 |
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| 180 | //
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| 181 | // check for 'used' neighbors this pixel which
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| 182 | //
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| 183 | const MGeomPix &gpix = (*fCam)[id];
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| 184 | const Int_t nnmax = gpix.GetNumNeighbors();
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| 185 |
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| 186 | #if 0
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| 187 | Bool_t cnt = kFALSE;
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| 188 | for (Int_t j=0; j<nnmax; j++)
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| 189 | {
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| 190 | const Int_t id2 = gpix.GetNeighbor(j);
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| 191 |
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| 192 | if (id2>max || !ispixused[id2])
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| 193 | continue;
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| 194 |
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| 195 | cnt = kTRUE;
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| 196 | break;
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| 197 | }
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| 198 | if (cnt)
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| 199 | continue;
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| 200 | #else
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| 201 | Int_t cnt = 0;
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| 202 | for (Int_t j=0; j<nnmax; j++)
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| 203 | {
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| 204 | const Int_t id2 = gpix.GetNeighbor(j);
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| 205 |
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| 206 | if (id2>max || !ispixused[id2])
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| 207 | continue;
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| 208 |
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| 209 | if (cnt++>nnmax-4)
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| 210 | break;
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| 211 | }
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| 212 | if (cnt==nnmax-2 && nnmax>=4)
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| 213 | {
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| 214 | pix.SetPixelUsed();
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| 215 | continue;
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| 216 | }
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| 217 | if (cnt>0)
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| 218 | continue;
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| 219 | #endif
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| 220 |
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| 221 | //
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| 222 | // check if no next neighbor has the state 'used'
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| 223 | // set this pixel to 'unused', too.
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| 224 | //
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| 225 | pix.SetPixelUnused();
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| 226 | }
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| 227 |
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| 228 | delete ispixused;
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| 229 |
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| 230 | //
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| 231 | // now we declare all pixels that survive as CorePixels
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| 232 | //
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| 233 | for (Int_t i=0; i<entries; i++)
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| 234 | {
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| 235 | MCerPhotPix &pix = (*fEvt)[i];
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| 236 |
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| 237 | if (pix.IsPixelUsed())
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| 238 | pix.SetPixelCore();
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| 239 | }
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| 240 | }
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| 241 |
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| 242 | // --------------------------------------------------------------------------
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| 243 | //
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| 244 | // Look for the boundary pixels around the core pixels
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| 245 | // if a pixel has more than 2.5 (clean level 2.5) sigma, and
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| 246 | // a core neigbor it is declared as used.
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| 247 | //
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| 248 | void MImgCleanStd::CleanStep3()
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| 249 | {
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| 250 | const Int_t entries = fEvt->GetNumPixels();
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| 251 |
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| 252 | for (Int_t i=0; i<entries; i++)
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| 253 | {
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| 254 | //
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| 255 | // get pixel as entry il from list
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| 256 | //
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| 257 | MCerPhotPix &pix = (*fEvt)[i];
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| 258 |
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| 259 | //
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| 260 | // if pixel is a core pixel go to the next pixel
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| 261 | //
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| 262 | if (pix.IsPixelCore())
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| 263 | continue;
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| 264 |
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| 265 | //
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| 266 | // check the num of photons against the noise level
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| 267 | //
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| 268 | const Float_t entry = pix.GetNumPhotons();
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| 269 | const Float_t noise = pix.GetErrorPhot();
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| 270 |
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| 271 | //
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| 272 | // get pixel id of this entry
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| 273 | //
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| 274 | const Int_t id = pix.GetPixId();
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| 275 |
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| 276 | const Double_t ratio = TMath::Sqrt(fCam->GetPixRatio(id));
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| 277 |
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| 278 | if (entry <= fCleanLvl2 * noise / ratio)
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| 279 | continue;
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| 280 |
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| 281 | //
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| 282 | // check if the pixel's next neighbor is a core pixel.
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| 283 | // if it is a core pixel set pixel state to: used.
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| 284 | //
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| 285 | MGeomPix &gpix = (*fCam)[id];
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| 286 | const Int_t nnmax = gpix.GetNumNeighbors();
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| 287 |
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| 288 | for (Int_t j=0; j<nnmax; j++)
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| 289 | {
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| 290 | const Int_t id2 = gpix.GetNeighbor(j);
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| 291 |
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| 292 | if (!fEvt->IsPixelCore(id2))
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| 293 | continue;
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| 294 |
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| 295 | pix.SetPixelUsed();
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| 296 | break;
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| 297 | }
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| 298 | }
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| 299 | }
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| 300 |
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| 301 | // --------------------------------------------------------------------------
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| 302 | //
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| 303 | // check if MEvtHeader exists in the Parameter list already.
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| 304 | // if not create one and add them to the list
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| 305 | //
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| 306 | Bool_t MImgCleanStd::PreProcess (MParList *pList)
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| 307 | {
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| 308 | fCam = (MGeomCam*)pList->FindObject("MGeomCam");
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| 309 | if (!fCam)
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| 310 | {
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| 311 | *fLog << dbginf << "MGeomCam not found (no geometry information available)... aborting." << endl;
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| 312 | return kFALSE;
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| 313 | }
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| 314 |
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| 315 | fEvt = (MCerPhotEvt*)pList->FindObject("MCerPhotEvt");
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| 316 | if (!fEvt)
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| 317 | {
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| 318 | *fLog << dbginf << "MCerPhotEvt not found... aborting." << endl;
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| 319 | return kFALSE;
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| 320 | }
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| 321 |
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| 322 | return kTRUE;
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| 323 | }
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| 324 |
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| 325 |
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| 326 | // --------------------------------------------------------------------------
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| 327 | //
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| 328 | // Cleans the image.
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| 329 | //
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| 330 | Bool_t MImgCleanStd::Process()
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| 331 | {
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| 332 | const Int_t max = CleanStep1();
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| 333 | CleanStep2(max);
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| 334 | CleanStep3();
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| 335 |
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| 336 | return kTRUE;
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| 337 | }
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| 338 |
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| 339 | // --------------------------------------------------------------------------
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| 340 | //
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| 341 | // Print descriptor and cleaning levels.
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| 342 | //
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| 343 | void MImgCleanStd::Print(Option_t *o) const
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| 344 | {
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| 345 | *fLog << GetDescriptor() << " initialized with noise level ";
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| 346 | *fLog << fCleanLvl1 << " and " << fCleanLvl2 << endl;
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| 347 | }
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| 348 |
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| 349 | // --------------------------------------------------------------------------
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| 350 | //
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| 351 | // Craete two text entry fields, one for each cleaning level and a
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| 352 | // describing text line.
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| 353 | //
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| 354 | void MImgCleanStd::CreateGuiElements(MGGroupFrame *f)
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| 355 | {
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| 356 | //
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| 357 | // Create a frame for line 3 and 4 to be able
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| 358 | // to align entry field and label in one line
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| 359 | //
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| 360 | TGHorizontalFrame *f1 = new TGHorizontalFrame(f, 0, 0);
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| 361 | TGHorizontalFrame *f2 = new TGHorizontalFrame(f, 0, 0);
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| 362 |
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| 363 | /*
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| 364 | * --> use with root >=3.02 <--
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| 365 | *
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| 366 |
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| 367 | TGNumberEntry *fNumEntry1 = new TGNumberEntry(frame, 3.0, 2, M_NENT_LVL1, kNESRealOne, kNEANonNegative);
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| 368 | TGNumberEntry *fNumEntry2 = new TGNumberEntry(frame, 2.5, 2, M_NENT_LVL1, kNESRealOne, kNEANonNegative);
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| 369 |
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| 370 | */
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| 371 | TGTextEntry *entry1 = new TGTextEntry(f1, "****", kImgCleanLvl1);
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| 372 | TGTextEntry *entry2 = new TGTextEntry(f2, "****", kImgCleanLvl2);
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| 373 |
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| 374 | // --- doesn't work like expected (until root 3.02?) --- fNumEntry1->SetAlignment(kTextRight);
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| 375 | // --- doesn't work like expected (until root 3.02?) --- fNumEntry2->SetAlignment(kTextRight);
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| 376 |
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| 377 | entry1->SetText("3.0");
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| 378 | entry2->SetText("2.5");
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| 379 |
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| 380 | entry1->Associate(f);
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| 381 | entry2->Associate(f);
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| 382 |
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| 383 | TGLabel *l1 = new TGLabel(f1, "Cleaning Level 1");
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| 384 | TGLabel *l2 = new TGLabel(f2, "Cleaning Level 2");
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| 385 |
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| 386 | l1->SetTextJustify(kTextLeft);
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| 387 | l2->SetTextJustify(kTextLeft);
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| 388 |
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| 389 | //
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| 390 | // Align the text of the label centered, left in the row
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| 391 | // with a left padding of 10
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| 392 | //
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| 393 | TGLayoutHints *laylabel = new TGLayoutHints(kLHintsCenterY|kLHintsLeft, 10);
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| 394 | TGLayoutHints *layframe = new TGLayoutHints(kLHintsCenterY|kLHintsLeft, 5, 0, 10);
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| 395 |
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| 396 | //
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| 397 | // Add one entry field and the corresponding label to each line
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| 398 | //
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| 399 | f1->AddFrame(entry1);
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| 400 | f2->AddFrame(entry2);
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| 401 |
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| 402 | f1->AddFrame(l1, laylabel);
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| 403 | f2->AddFrame(l2, laylabel);
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| 404 |
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| 405 | f->AddFrame(f1, layframe);
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| 406 | f->AddFrame(f2, layframe);
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| 407 |
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| 408 | f->AddToList(entry1);
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| 409 | f->AddToList(entry2);
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| 410 | f->AddToList(l1);
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| 411 | f->AddToList(l2);
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| 412 | f->AddToList(laylabel);
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| 413 | f->AddToList(layframe);
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| 414 | }
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| 415 |
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| 416 | void MImgCleanStd::SetLvl1(Float_t lvl)
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| 417 | {
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| 418 | fCleanLvl1 = lvl;
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| 419 | *fLog << inf << "Cleaning level 1 set to " << lvl << " sigma." << endl;
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| 420 | }
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| 421 |
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| 422 | void MImgCleanStd::SetLvl2(Float_t lvl)
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| 423 | {
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| 424 | fCleanLvl2 = lvl;
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| 425 | *fLog << inf << "Cleaning level 2 set to " << lvl << " sigma." << endl;
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| 426 | }
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| 427 |
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| 428 | // --------------------------------------------------------------------------
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| 429 | //
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| 430 | // Process the GUI Events comming from the two text entry fields.
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| 431 | //
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| 432 | Bool_t MImgCleanStd::ProcessMessage(Int_t msg, Int_t submsg, Long_t param1, Long_t param2)
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| 433 | {
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| 434 | if (msg!=kC_TEXTENTRY || submsg!=kTE_ENTER)
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| 435 | return kTRUE;
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| 436 |
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| 437 | TGTextEntry *txt = (TGTextEntry*)FindWidget(param1);
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| 438 |
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| 439 | if (!txt)
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| 440 | return kTRUE;
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| 441 |
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| 442 | Float_t lvl = atof(txt->GetText());
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| 443 |
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| 444 | switch (param1)
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| 445 | {
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| 446 | case kImgCleanLvl1:
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| 447 | SetLvl1(lvl);
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| 448 | return kTRUE;
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| 449 |
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| 450 | case kImgCleanLvl2:
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| 451 | SetLvl2(lvl);
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| 452 | return kTRUE;
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| 453 | }
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| 454 |
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| 455 | return kTRUE;
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| 456 | }
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| 457 |
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| 458 | // --------------------------------------------------------------------------
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| 459 | //
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| 460 | // Implementation of SavePrimitive. Used to write the call to a constructor
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| 461 | // to a macro. In the original root implementation it is used to write
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| 462 | // gui elements to a macro-file.
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| 463 | //
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| 464 | void MImgCleanStd::StreamPrimitive(ofstream &out) const
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| 465 | {
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| 466 | out << " MImgCleanStd " << GetUniqueName() << "(";
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| 467 | out << fCleanLvl1 << ", " << fCleanLvl2;
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| 468 |
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| 469 | if (fName!=gsDefName || fTitle!=gsDefTitle)
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| 470 | {
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| 471 | out << ", \"" << fName << "\"";
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| 472 | if (fTitle!=gsDefTitle)
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| 473 | out << ", \"" << fTitle << "\"";
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| 474 | }
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| 475 | out << ");" << endl;
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| 476 | }
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| 477 |
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| 478 | // --------------------------------------------------------------------------
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|---|
| 479 | //
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|---|
| 480 | // Read the setup from a TEnv:
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|---|
| 481 | // Float_t fCleanLvl1: CleaningLevel1
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| 482 | // Float_t fCleanLvl2: CleaningLevel2
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|---|
| 483 | //
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| 484 | Bool_t MImgCleanStd::ReadEnv(const TEnv &env, TString prefix, Bool_t print)
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|---|
| 485 | {
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|---|
| 486 | Bool_t rc = kTRUE;
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|---|
| 487 | if (!IsEnvDefined(env, prefix, "CleaningLevel1", print))
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|---|
| 488 | rc = kFALSE;
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|---|
| 489 | else
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|---|
| 490 | {
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|---|
| 491 | SetLvl1(GetEnvValue(env, prefix, "CleaningLevel1", fCleanLvl1));
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|---|
| 492 | if (fCleanLvl1<0)
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|---|
| 493 | {
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|---|
| 494 | *fLog << err << "ERROR - Negative values for Cleaning Level 1 forbidden." << endl;
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|---|
| 495 | return kERROR;
|
|---|
| 496 | }
|
|---|
| 497 | }
|
|---|
| 498 |
|
|---|
| 499 | if (!IsEnvDefined(env, prefix, "CleaningLevel2", print))
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|---|
| 500 | rc = kFALSE;
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|---|
| 501 | else
|
|---|
| 502 | {
|
|---|
| 503 | SetLvl2(GetEnvValue(env, prefix, "CleaningLevel2", fCleanLvl2));
|
|---|
| 504 | if (fCleanLvl2<0)
|
|---|
| 505 | {
|
|---|
| 506 | *fLog << err << "ERROR - Negative values for Cleaning Level 2 forbidden." << endl;
|
|---|
| 507 | return kERROR;
|
|---|
| 508 | }
|
|---|
| 509 | }
|
|---|
| 510 |
|
|---|
| 511 | return rc;
|
|---|
| 512 | }
|
|---|
