[2613] | 1 | //
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| 2 | // C++ Implimentation: RasterEdgeDetector
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| 3 | //
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| 4 | // Description:
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| 5 | //
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| 6 | //
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| 7 | // Author: Takeshi Nakazato <takeshi.nakazato@nao.ac.jp>, (C) 2012
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| 8 | //
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| 9 | // Copyright: See COPYING file that comes with this distribution
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| 10 | //
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| 11 | //
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| 12 | #include <casa/Arrays/Vector.h>
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| 13 | #include <casa/Arrays/ArrayMath.h>
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| 14 | #include <casa/Arrays/ArrayIO.h>
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| 15 | #include <casa/Containers/Record.h>
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| 16 | //#include <casa/Utilities/GenSort.h>
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| 17 |
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| 18 | #include "RasterEdgeDetector.h"
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| 19 |
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| 20 | using namespace std ;
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| 21 | using namespace casa ;
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| 22 |
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| 23 | namespace asap {
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| 24 |
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| 25 | RasterEdgeDetector::RasterEdgeDetector()
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| 26 | : EdgeDetector()
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| 27 | {}
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| 28 |
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| 29 | RasterEdgeDetector::~RasterEdgeDetector()
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| 30 | {}
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| 31 |
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| 32 | Vector<uInt> RasterEdgeDetector::detect()
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| 33 | {
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[2615] | 34 | os_.origin(LogOrigin( "RasterEdgeDetector", "detect", WHERE )) ;
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| 35 |
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[2613] | 36 | initDetect() ;
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| 37 |
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| 38 | detectGap() ;
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| 39 | selection() ;
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| 40 |
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[2615] | 41 | os_ << LogIO::DEBUGGING
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| 42 | << "Detected " << off_.nelements() << " integrations as OFF" << LogIO::POST ;
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| 43 |
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[2613] | 44 | return off_ ;
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| 45 | }
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| 46 |
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| 47 | void RasterEdgeDetector::parseOption( const Record &option )
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| 48 | {
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| 49 | os_.origin(LogOrigin( "RasterEdgeDetector", "parseOption", WHERE )) ;
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| 50 |
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| 51 | String name = "fraction" ;
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| 52 | if ( option.isDefined( name ) ) {
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| 53 | if ( option.dataType( name ) == TpString ) {
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| 54 | String fstr = option.asString( name ) ;
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| 55 | if ( fstr == "auto" ) {
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| 56 | fraction_ = -1.0 ; // indicates "auto"
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| 57 | }
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| 58 | else {
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| 59 | // should be "xx%" format
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[2626] | 60 | fstr.substr(0,fstr.size()-1) ;
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[2613] | 61 | fraction_ = String::toFloat( fstr ) * 0.01 ;
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| 62 | }
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| 63 | }
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| 64 | else {
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| 65 | fraction_ = option.asFloat( name ) ;
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| 66 | }
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| 67 | }
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| 68 | else {
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| 69 | fraction_ = 0.1 ; // default is 10%
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| 70 | }
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| 71 | name = "npts" ;
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| 72 | if ( option.isDefined( name ) ) {
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| 73 | npts_ = option.asInt( name ) ;
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| 74 | }
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| 75 | else {
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| 76 | npts_ = -1 ; // default is -1 (use fraction_)
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| 77 | }
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| 78 |
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| 79 | os_ << "OPTION SUMMARY: " << endl
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| 80 | << " fraction=" << fraction_ << endl
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| 81 | << " npts=" << npts_ << LogIO::POST ;
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| 82 | }
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| 83 |
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| 84 | void RasterEdgeDetector::detectGap()
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| 85 | {
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| 86 | os_.origin(LogOrigin( "RasterEdgeDetector", "detectGap", WHERE )) ;
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| 87 |
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| 88 | uInt n = time_.nelements() ;
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| 89 | Vector<Double> tdiff( n-1 ) ;
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| 90 | for ( uInt i = 0 ; i < n-1 ; i++ ) {
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| 91 | tdiff[i] = time_[i+1] - time_[i] ;
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| 92 | }
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| 93 | Double tmed = median( tdiff, False, True, False ) ;
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| 94 | Double threshold = tmed * 5.0 ;
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| 95 | uInt idx = 0 ;
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| 96 | tempuInt_[idx++] = 0 ;
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| 97 | for ( uInt i = 0 ; i < n-1 ; i++ ) {
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| 98 | if ( tdiff[i] > threshold ) {
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| 99 | tempuInt_[idx++] = i+1 ;
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| 100 | }
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| 101 | }
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| 102 | if ( tempuInt_[idx-1] != n ) {
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| 103 | tempuInt_[idx++] = n ;
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| 104 | }
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| 105 | gaplist_ = vectorFromTempStorage( idx ) ;
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[2615] | 106 |
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| 107 | os_ << LogIO::DEBUGGING
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| 108 | << "Detected " << gaplist_.nelements() << " time gaps." << LogIO::POST ;
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[2613] | 109 | }
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| 110 |
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| 111 | void RasterEdgeDetector::selection()
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| 112 | {
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[2615] | 113 | // os_.origin(LogOrigin( "RasterEdgeDetector", "selection", WHERE )) ;
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[2613] | 114 |
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| 115 | uInt n = gaplist_.nelements() - 1 ;
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| 116 | uInt idx = 0 ;
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| 117 | for ( uInt i = 0 ; i < n ; i++ ) {
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| 118 | uInt start = gaplist_[i] ;
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| 119 | uInt end = gaplist_[i+1] ;
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| 120 | selectionPerRow( idx, start, end ) ;
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| 121 | }
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| 122 | off_ = vectorFromTempStorage( idx ) ;
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| 123 | //sort( off_, Sort::Ascending, Sort::QuickSort | Sort::NoDuplicates ) ;
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| 124 | }
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| 125 |
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| 126 | void RasterEdgeDetector::selectionPerRow( uInt &idx,
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| 127 | const uInt &start,
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| 128 | const uint &end )
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| 129 | {
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[2615] | 130 | // os_.origin(LogOrigin( "RasterEdgeDetector", "selectionPerRow", WHERE )) ;
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[2613] | 131 |
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| 132 | uInt len = end - start ;
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| 133 | uInt noff = numOff( len ) ;
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| 134 |
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| 135 | if ( len > noff * 2 ) {
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| 136 | uInt n = start + noff ;
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| 137 | for ( uInt i = start ; i < n ; i++ ) {
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| 138 | tempuInt_[idx++] = i ;
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| 139 | }
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| 140 | n = end - noff ;
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| 141 | for ( uInt i = n ; i < end ; i++ ) {
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| 142 | tempuInt_[idx++] = i ;
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| 143 | }
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| 144 | }
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| 145 | else {
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| 146 | // add all elements to off position list
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| 147 | for ( uInt i = start ; i < end ; i++ ) {
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| 148 | tempuInt_[idx++] = i ;
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| 149 | }
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| 150 | }
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| 151 | }
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| 152 |
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| 153 | uInt RasterEdgeDetector::numOff( const uInt &n )
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| 154 | {
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| 155 | uInt ret = 0 ;
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| 156 | if ( npts_ > 0 ) {
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| 157 | ret = min( (uInt)npts_, n ) ;
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| 158 | }
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| 159 | else if ( fraction_ < 0 ) {
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| 160 | ret = optimumNumber( n ) ;
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| 161 | }
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| 162 | else {
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| 163 | ret = int( n * fraction_ ) ;
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| 164 | }
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| 165 | return ((ret > 0) ? ret : 1) ;
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| 166 | }
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| 167 |
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| 168 | uInt RasterEdgeDetector::optimumNumber( const uInt &n )
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| 169 | {
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| 170 | return uInt( sqrt( n + 1 ) ) - 1 ;
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| 171 | }
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| 172 |
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| 173 | } // namespace asap
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