Commit 3033b88677f3d9c402a43cbaac5b6c19b0db4565
1 parent
177c7863
implemented spectral cropping in BIL and BIP files
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2 changed files
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72 additions
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25 deletions
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stim/envi/bil.h
@@ -1012,27 +1012,48 @@ public: | @@ -1012,27 +1012,48 @@ public: | ||
1012 | unsigned long long b0, | 1012 | unsigned long long b0, |
1013 | unsigned long long b1){ | 1013 | unsigned long long b1){ |
1014 | 1014 | ||
1015 | - //calculate the new number of samples and lines | ||
1016 | - unsigned long long sam = x1 - x0; //samples | ||
1017 | - unsigned long long lin = y1 - y0; //lines | ||
1018 | - unsigned long long L = sam * Z() * sizeof(T); | ||
1019 | - //get specified band and save | ||
1020 | - T* temp = (T*)malloc(L); | 1015 | + //calculate the new image parameters |
1016 | + unsigned long long samples = x1 - x0; | ||
1017 | + unsigned long long lines = y1 - y0; | ||
1018 | + unsigned long long bands = b1 - b0; | ||
1019 | + | ||
1020 | + //calculate the size of a line | ||
1021 | + unsigned long long L = samples * sizeof(T); | ||
1022 | + | ||
1023 | + | ||
1024 | + //allocate space for a line | ||
1025 | + T* temp = (T*)malloc(bands * L); | ||
1026 | + | ||
1027 | + //create an output stream to store the cropped file | ||
1021 | std::ofstream out(outfile.c_str(), std::ios::binary); | 1028 | std::ofstream out(outfile.c_str(), std::ios::binary); |
1022 | - unsigned long long jumpb = (X() - sam) * sizeof(T); //jump pointer to the next band | ||
1023 | - //get start | ||
1024 | - file.seekg((y0 * X() * Z() + x0) * sizeof(T), std::ios::beg); | ||
1025 | - for (unsigned i = 0; i < lin; i++) | 1029 | + |
1030 | + //calculate the distance between bands | ||
1031 | + unsigned long long jumpb = (X() - samples) * sizeof(T); | ||
1032 | + | ||
1033 | + //distance needed to jump from the previous line of the last band to the next line of the first band | ||
1034 | + unsigned long long longjump = ((Z() - b1) * X() + b0 * X()) * sizeof(T); | ||
1035 | + | ||
1036 | + //set the start position for the cropped region | ||
1037 | + file.seekg((y0 * X() * Z() + b0 * X() + x0) * sizeof(T), std::ios::beg); | ||
1038 | + | ||
1039 | + for (unsigned x = 0; x < lines; x++) | ||
1026 | { | 1040 | { |
1027 | - for (unsigned j = 0; j < Z(); j++) | 1041 | + for (unsigned z = b0; z < b1; z++) |
1028 | { | 1042 | { |
1029 | - file.read((char *)(temp + j * sam), sizeof(T) * sam); | 1043 | + file.read((char *)(temp + z * samples), sizeof(T) * samples); |
1030 | file.seekg(jumpb, std::ios::cur); //go to the next band | 1044 | file.seekg(jumpb, std::ios::cur); //go to the next band |
1031 | 1045 | ||
1032 | - thread_data = (double)(i * Z() + j) / (lin * Z()) * 100; | 1046 | + thread_data = (double)(x * Z() + z) / (lines * Z()) * 100; |
1033 | } | 1047 | } |
1034 | - out.write(reinterpret_cast<const char*>(temp), L); //write slice data into target file | 1048 | + |
1049 | + //write slice data into target file | ||
1050 | + out.write(reinterpret_cast<const char*>(temp), bands * L); | ||
1051 | + | ||
1052 | + //seek to the beginning of the next X-Z slice | ||
1053 | + file.seekg(longjump, std::ios::cur); | ||
1035 | } | 1054 | } |
1055 | + | ||
1056 | + //free the temporary frame | ||
1036 | free(temp); | 1057 | free(temp); |
1037 | 1058 | ||
1038 | thread_data = 100; | 1059 | thread_data = 100; |
stim/envi/bip.h
@@ -1068,24 +1068,50 @@ public: | @@ -1068,24 +1068,50 @@ public: | ||
1068 | unsigned long long b0, | 1068 | unsigned long long b0, |
1069 | unsigned long long b1){ | 1069 | unsigned long long b1){ |
1070 | 1070 | ||
1071 | - //calculate the new number of samples and lines | ||
1072 | - unsigned long long sam = x1 - x0; //samples | ||
1073 | - unsigned long long lin = y1 - y0; //lines | ||
1074 | - unsigned long long L = Z() * sizeof(T); | ||
1075 | - //get specified band and save | 1071 | + //calculate the new number of samples, lines, and bands |
1072 | + unsigned long long samples = x1 - x0; | ||
1073 | + unsigned long long lines = y1 - y0; | ||
1074 | + unsigned long long bands = b1 - b0; | ||
1075 | + | ||
1076 | + //calculate the length of one cropped spectrum | ||
1077 | + unsigned long long L = bands * sizeof(T); | ||
1078 | + | ||
1079 | + //unsigned long long L = Z() * sizeof(T); | ||
1080 | + | ||
1081 | + //allocate space for the spectrum | ||
1076 | T* temp = (T*)malloc(L); | 1082 | T* temp = (T*)malloc(L); |
1083 | + | ||
1084 | + //open an output file for binary writing | ||
1077 | std::ofstream out(outfile.c_str(), std::ios::binary); | 1085 | std::ofstream out(outfile.c_str(), std::ios::binary); |
1078 | - //get start | ||
1079 | - unsigned long long sp = y0 * X() + x0; //start pixel | ||
1080 | - for (unsigned i = 0; i < lin; i++) | 1086 | + |
1087 | + //seek to the first pixel in the cropped image | ||
1088 | + file.seekg( (y0 * X() * Z() + x0 * Z() + b0) * sizeof(T), std::ios::beg); | ||
1089 | + | ||
1090 | + //distance between sample spectra in the same line | ||
1091 | + unsigned long long jump_sample = ( (Z() - b1) + b0 ) * sizeof(T); | ||
1092 | + | ||
1093 | + //distance between sample spectra in adjacent lines | ||
1094 | + unsigned long long jump_line = (X() - x1) * Z() * sizeof(T); | ||
1095 | + | ||
1096 | + | ||
1097 | + //unsigned long long sp = y0 * X() + x0; //start pixel | ||
1098 | + | ||
1099 | + //for each pixel in the image | ||
1100 | + for (unsigned y = 0; y < lines; y++) | ||
1081 | { | 1101 | { |
1082 | - for (unsigned j = 0; j < sam; j++) | 1102 | + for (unsigned x = 0; x < samples; x++) |
1083 | { | 1103 | { |
1084 | - pixel(temp, sp + j + i * X()); | 1104 | + //read the cropped spectral region |
1105 | + file.read( (char*) temp, L ); | ||
1106 | + //pixel(temp, sp + x + y * X()); | ||
1085 | out.write(reinterpret_cast<const char*>(temp), L); //write slice data into target file | 1107 | out.write(reinterpret_cast<const char*>(temp), L); //write slice data into target file |
1086 | 1108 | ||
1087 | - thread_data = (double)(i * sam + j) / (lin * sam) * 100; | 1109 | + file.seekg(jump_sample, std::ios::cur); |
1110 | + | ||
1111 | + thread_data = (double)(y * samples + x) / (lines * samples) * 100; | ||
1088 | } | 1112 | } |
1113 | + | ||
1114 | + file.seekg(jump_line, std::ios::cur); | ||
1089 | } | 1115 | } |
1090 | free(temp); | 1116 | free(temp); |
1091 | 1117 |