Zadanie 3 ready with all changes
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@ -29,10 +29,12 @@ void Histogram::generate(QImage* image)
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for(int i = 0 ; i < image->height(); i++){
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for(int j = 0 ; j < image->width() ; j++){
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QColor *clrCurrent = new QColor( image->pixel(i,j) );
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R->insert(clrCurrent->red(),R->value(clrCurrent->red())+1);
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G->insert(clrCurrent->green(),R->value(clrCurrent->green())+1);
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B->insert(clrCurrent->blue(),R->value(clrCurrent->blue())+1);
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L->insert(clrCurrent->alpha(),R->value(clrCurrent->alpha())+1);
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QRgb pixel = image->pixel(i,j);
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R->insert(qRed(pixel),R->value(qRed(pixel))+1);
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G->insert(qGreen(pixel),G->value(qGreen(pixel))+1);
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B->insert(qBlue(pixel),B->value(qBlue(pixel))+1);
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L->insert(qAlpha(pixel),L->value(qAlpha(pixel))+1);
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}
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}
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}
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@ -65,7 +67,7 @@ int Histogram::getMaxFromQHashHelper( QHash<int, int> * channel ){
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QHash<int, int>::const_iterator iterator = channel->begin();
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while (iterator != channel->end())
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{
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if(iterator.value() > max){
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if(iterator.value() > max && iterator.value() != 0 ){
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max = iterator.value();
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}
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++iterator;
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@ -80,7 +82,7 @@ int Histogram::getMaxKey( QHash<int, int> * channel ){
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QHash<int, int>::const_iterator iterator = channel->begin();
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while (iterator != channel->end())
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{
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if(iterator.key() > max){
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if(iterator.key() > max && iterator.value() != 0){
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max = iterator.key();
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}
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++iterator;
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@ -95,7 +97,7 @@ int Histogram::getMinKey( QHash<int, int> * channel ){
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QHash<int, int>::const_iterator iterator = channel->begin();
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while (iterator != channel->end())
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{
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if(iterator.key() < min){
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if(iterator.key() < min && iterator.value() != 0){
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min = iterator.key();
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}
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++iterator;
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@ -111,7 +113,7 @@ int Histogram::getMinFromQHashHelper( QHash<int, int> * channel ){
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QHash<int, int>::const_iterator iterator = channel->begin();
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while (iterator != channel->end())
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{
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if(iterator.value() < min){
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if(iterator.value() < min && iterator.value() != 0){
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min = iterator.value();
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}
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++iterator;
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@ -16,11 +16,73 @@ PNM* HistogramEqualization::transform()
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{
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int width = image->width();
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int height = image->height();
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int pixelAmounts = width* height;
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PNM* newImage = new PNM(width, height, image->format());
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double LUTr[256], LUTg[256], LUTb[256],
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redHist[256], greenHist[256], blueHist[256],
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distRed[256], distGreen[256], distBlue[256];
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qDebug() << Q_FUNC_INFO << "Not implemented yet!";
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zeros(redHist,greenHist,blueHist);
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zeros(distRed,distGreen,distBlue);
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zeros(LUTr,LUTb,LUTg);
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for (int x = 0; x < width; x++){
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for (int y = 0; y < height; y++)
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{
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QRgb pixel = image->pixel(x,y);
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redHist[qRed(pixel)]++;
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greenHist[qGreen(pixel)]++;
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blueHist[qBlue(pixel)]++;
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}
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}
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double sumR = 0;
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double sumG = 0;
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double sumB = 0;
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for (int i=0; i<256; i++)
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{
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sumR += (redHist[i]/pixelAmounts);
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sumG += (greenHist[i]/pixelAmounts);
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sumB += (blueHist[i]/pixelAmounts);
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distRed[i] += sumR;
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distGreen[i] += sumG;
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distBlue[i] += sumB;
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}
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prepareLUTperChannel(distRed, LUTr);
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prepareLUTperChannel(distGreen, LUTg );
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prepareLUTperChannel(distBlue, LUTb );
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for (int i = 0; i< width; i++){
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for (int j = 0; j< height; j++)
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{
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QRgb pixel = image->pixel(i,j);
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newImage->setPixel(i,j, QColor( LUTr[qRed(pixel)], LUTg[qGreen(pixel)], LUTb[qBlue(pixel)]).rgba() );
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}
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}
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return newImage;
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}
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void HistogramEqualization::prepareLUTperChannel(double *D, double *LUT)
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{
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double Dmin = 0;
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for(int i = 0; i < 256 ; i++){
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if(D[i+1] > 0){
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Dmin = D[i+1];
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break;
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}
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}
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for (int i=0; i<256; i++){
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LUT[i] = ( 255* ((D[i] - Dmin) / (1 - Dmin))) ;
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}
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}
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void HistogramEqualization::zeros(double * r_tab, double * g_tab, double* b_tab){
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for (int i=0; i<256; i++)
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{
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r_tab[i] = 0;
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g_tab[i] = 0;
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b_tab[i] = 0;
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}
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}
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@ -8,8 +8,12 @@ class HistogramEqualization : public Transformation
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public:
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HistogramEqualization(PNM*);
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HistogramEqualization(PNM*, ImageViewer*);
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QHash<int, int> prepareDistrubuantPerChannel(QHash <int,int> * , int);
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void prepareLUTperChannel(double *, double * );
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void zeros(double *, double * , double * );
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virtual PNM* transform();
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int min(QHash<int, int> *dist);
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};
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@ -14,10 +14,9 @@ HistogramStretching::HistogramStretching(PNM* img, ImageViewer* iv) :
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PNM* HistogramStretching::transform()
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{
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qDebug() << Q_FUNC_INFO << "START";
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int width = image->width();
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int height = image->height();
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PNM* newImage = new PNM(width, height, image->format());
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Histogram * histogram = image->getHistogram();
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@ -30,10 +29,6 @@ PNM* HistogramStretching::transform()
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int maxBlue = histogram->getMaxKey(histogram->get(histogram->BChannel));
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int minBlue = histogram->getMinKey(histogram->get(histogram->BChannel));
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int maxAlpha = histogram->getMaxKey(histogram->get(histogram->LChannel));
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int minAlpha = histogram->getMinKey(histogram->get(histogram->LChannel));
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qDebug() << Q_FUNC_INFO << "LOOP";
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for(int x = 0 ; x < width; x++){
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for (int y = 0 ; y < height; y++) {
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@ -41,11 +36,6 @@ PNM* HistogramStretching::transform()
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int g = (qGreen(pixel) - minGreen) * (MAX_VALUE/(maxGreen-minGreen));
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int r = (qRed(pixel) - minRed) * (MAX_VALUE/(maxRed-minRed));
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int b = (qBlue(pixel) - minBlue) * (MAX_VALUE/(maxBlue-minBlue));
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// int a = (qAlpha(pixel) - minAlpha) * (MAX_VALUE/(maxAlpha-minAlpha));
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qDebug() << Q_FUNC_INFO << "1. Here is working !!";
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QRgb blee = QColor(r,g,b).rgba();
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qDebug() << Q_FUNC_INFO << "2. Here is workingt too !!";
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newImage->setPixel(x,y,QColor(r,g,b).rgba());
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}
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}
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@ -1,48 +0,0 @@
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#include "histogram_stretching.h"
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#include "../histogram.h"
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HistogramStretching::HistogramStretching(PNM* img) :
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Transformation(img)
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{
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}
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HistogramStretching::HistogramStretching(PNM* img, ImageViewer* iv) :
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Transformation(img, iv)
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{
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}
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PNM* HistogramStretching::transform()
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{
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qDebug() << Q_FUNC_INFO << "START";
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int width = image->width();
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int height = image->height();
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PNM* newImage = new PNM(width, height, image->format());
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Histogram * histogram = image->getHistogram();
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int maxRed = histogram->getMaxKey(histogram->get(histogram->RChannel));
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int minRed = histogram->getMinKey(histogram->get(histogram->RChannel));
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int maxGreen = histogram->getMaxKey(histogram->get(histogram->GChannel));
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int minGreen = histogram->getMinKey(histogram->get(histogram->GChannel));
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int maxBlue = histogram->getMaxKey(histogram->get(histogram->BChannel));
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int minBlue = histogram->getMinKey(histogram->get(histogram->BChannel));
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qDebug() << Q_FUNC_INFO << "LOOP";
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for(int x = 0 ; x < width; x++){
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for (int y = 0 ; y < height; y++) {
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QRgb pixel = image->pixel(x,y);
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int g = (qGreen(pixel) - minGreen) * (MAX_VALUE/(maxGreen-minGreen));
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int r = (qRed(pixel) - minRed) * (MAX_VALUE/(maxRed-minRed));
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int b = (qBlue(pixel) - minBlue) * (MAX_VALUE/(maxBlue-minBlue));
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newImage->setPixel(x,y,QColor(r,g,b).rgba());
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}
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}
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return newImage;
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}
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