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[!!! TASK] Begin implementing partial linear histogramm adaption - broken;

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This commit is contained in:
Jan Philipp Timme 2015-11-23 13:01:11 +01:00
parent fd24f7bb6c
commit 282fa987ed
1 changed files with 41 additions and 7 deletions
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48
imageviewer-qt4.cpp
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@ -371,19 +371,53 @@ void ImageViewer::linearHistogrammAdaption(void) {
void ImageViewer::partialLinearHistogrammAdaption() {
logFile << "Doing partial linear histogramm adaption ..." << std::endl;
renewLogging();
// TODO
// Get cumulative histogramm from reference image
double* reference_histogramm = histogramm_reference->getRelativeCumulativeIntensityHistogramm();
// Split [0,255] into n parts (slider)
// fetch the values for the n parts, do some math and create the histogramm map
int number_parts = partial_adaption_pieces_slider->value();
int* parts = (int*) malloc(number_parts*sizeof(int));
for(int i=0; i<=number_parts; i++) {
parts[i] = qRound((255.0/number_parts)*i);
}
// Create
double* histogramm_map = (double*) malloc(256*sizeof(double));
for(int i=0; i<=number_parts; i++) {
int current_n = parts[i];
if(current_n == 0) continue; // First part is always at zero!
int last_n = parts[i-1];
int delta_n = current_n - last_n;
double delta_i = reference_histogramm[current_n] - reference_histogramm[last_n];
double m = delta_i / delta_n;
double offset = histogramm_map[last_n];
// Fill in the blanks
for(int j=last_n; j<=current_n; j++) {
int delta_n = j - last_n;
histogramm_map[j] = (offset + delta_n*m);
logFile << j << " -> " << histogramm_map[j] << std::endl;
}
}
// Apply the histogramm map (see succeeding Histogramm Adaption)
/*
int h, s, l;
int pixels = working_copy->getImage()->width() * working_copy->getImage()->height();
for(int x=0; x<working_copy->getImage()->width(); x++) {
for(int y=0; y<working_copy->getImage()->height(); y++) {
QColor color = QColor::fromRgb(original->getImage()->pixel(x, y));
color.getHsl(&h, &s, &l);
l = qRound(histogramm_map[l] * (255/pixels));
color.setHsl(h, s, l);
working_copy->getImage()->setPixel(x, y, color.rgb());
}
}*/
// Done.
free(histogramm_map);
free(parts);
logFile << "done." << std::endl;
renewLogging();
updateImageDisplay();
}
/**