s464894/PrzetwarzanieObrazow-DK
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Compare commits

base: s464894:96129bc8ab78265908c436bdcf19fe69d206d5d4
Branches Tags
s464894:main
..
compare: s464894:664d4e19f9d409bf10f1b7a336e8acbac23c3d7a
Branches Tags
s464894:main

No commits in common. "96129bc8ab78265908c436bdcf19fe69d206d5d4" and "664d4e19f9d409bf10f1b7a336e8acbac23c3d7a" have entirely different histories.
96129bc8ab ... 664d4e19f9

2 changed files with 56 additions and 123 deletions
Show Stats Expand all files Collapse all files

91
src/core/transformations/histogram_equalization.cpp
View File

@ -1,6 +1,6 @@
#include "histogram_equalization.h" #include "histogram_equalization.h"
#include "../histogram.h" #include "../histogram.h"
#include <cmath> // Dla funkcji round
HistogramEqualization::HistogramEqualization(PNM* img) : HistogramEqualization::HistogramEqualization(PNM* img) :
Transformation(img) Transformation(img)
@ -14,77 +14,44 @@ HistogramEqualization::HistogramEqualization(PNM* img, ImageViewer* iv) :
PNM* HistogramEqualization::transform() PNM* HistogramEqualization::transform()
{ {
float width = image->width(); int width = image->width();
float height = image->height(); int height = image->height();
// Tworzymy nowy obiekt PNM do przechowywania przetworzonego obrazu
PNM* newImage = new PNM(width, height, image->format()); PNM* newImage = new PNM(width, height, image->format());
Histogram* histogram = image->getHistogram();
QHash<int, int>* R = histogram->get(Histogram::RChannel); // Tworzymy histogram dla obecnego obrazu
QHash<int, int>* G = histogram->get(Histogram::GChannel); Histogram* hist = image->getHistogram(); // Nie przekazujemy argumentów
QHash<int, int>* B = histogram->get(Histogram::BChannel);
QHash<int, int>* L = histogram->get(Histogram::LChannel);
// Probability tables // Pobieramy łączną liczbę pikseli na obrazie
float redProb[255]; int totalPixels = width * height;
float greenProb[255];
float blueProb[255];
float greyProb[255];
float pixelSum = width * height; // Tworzymy dystrybuantę
for (int i = 0; i < 256; i++) QVector<double> cdf(256, 0.0); // Inicjalizujemy wszystkie wartości na 0.0
{ double sum = 0.0;
redProb[i] = (R->value(i)) / (pixelSum); for (int i = 0; i < 256; ++i) {
greenProb[i] = (G->value(i)) / (pixelSum); sum += hist->get(Histogram::LChannel)->value(i) / static_cast<double>(totalPixels); // Używamy kanału luminancji
blueProb[i] = (B->value(i)) / (pixelSum); cdf[i] = sum;
greyProb[i] = (L->value(i)) / (pixelSum);
} }
// D look-up // Normalizujemy dystrybuantę do przedziału [0, 255]
float redD[255]; QVector<int> lookupTable(256, 0);
float greenD[255]; for (int i = 0; i < 256; ++i) {
float blueD[255]; lookupTable[i] = round(cdf[i] * 255);
float greyD[255];
// Create template values
float sumRed = 0;
float sumGreen = 0;
float sumBlue = 0;
float sumGrey = 0;
for(int i = 0; i < 255; i++)
{
sumRed = redProb[i] + sumRed;
redD[i] = sumRed;
sumGreen = greenProb[i] + sumGreen;
greenD[i] = sumGreen;
sumBlue = blueProb[i] + sumBlue;
blueD[i] = sumBlue;
sumGrey= greyProb[i] + sumGrey;
greyD[i] = sumGrey;
} }
for (int x = 0; x < image->width(); x++) // Przeprowadzamy wyrównywanie histogramu
{ for (int y = 0; y < height; ++y) {
for (int y = 0; y < image->height(); y++) for (int x = 0; x < width; ++x) {
{
QRgb pixel = image->pixel(x, y); QRgb pixel = image->pixel(x, y);
if (image->format() == QImage::Format_RGB32) { int grayValue = qGray(pixel); // Pobieramy wartość odcienia szarości
newImage->setPixel(
x, // Używamy wartości z lookupTable jako nowej wartości odcienia szarości
y, int newGrayValue = lookupTable[grayValue];
QColor( QRgb newPixel = qRgb(newGrayValue, newGrayValue, newGrayValue); // Ustawiamy nową wartość dla każdego kanału RGB
redD[qRed(pixel)] * 255,
greenD[qGreen(pixel)] * 255, // Ustawiamy nowy piksel na obrazie docelowym
blueD[qBlue(pixel)] * 255 newImage->setPixel(x, y, newPixel);
).rgb());
}
else {
newImage->setPixel(x, y, greyD[qGray(pixel)] * 255);
}
} }
} }

88
src/core/transformations/histogram_stretching.cpp
View File

@ -20,76 +20,42 @@ PNM* HistogramStretching::transform()
PNM* newImage = new PNM(width, height, image->format()); PNM* newImage = new PNM(width, height, image->format());
Histogram* histogram = image->getHistogram(); Histogram* histogram = image->getHistogram();
int maxRed = 255, maxGreen = 255, maxBlue = 255, maxGrey = 255; int minValue = -1;
int maxValue = -1;
int minRed = 0, minGreen = 0, minBlue = 0, minGrey = 0; for (int y = 0; y < image->height(); ++y) {
for (int x = 0; x < image->width(); ++x) {
QHash<int, int>* R = histogram->get(histogram->RChannel); if (histogram->get(Histogram::LChannel)->value(x + y * x) != 0)
QHash<int, int>* G = histogram->get(histogram->GChannel); {
QHash<int, int>* B = histogram->get(histogram->BChannel); minValue = histogram->get(Histogram::LChannel)->value(x + y * x);
QHash<int, int>* L = histogram->get(histogram->LChannel); break;
}
for (int i=0; i<256; i++)
{
if (R->value(minRed) == 0) {
minRed++;
}
if (G->value(minGreen) == 0) {
minGreen++;
}
if (B->value(minBlue) == 0) {
minBlue++;
}
if (L->value(minGrey) == 0) {
minGrey++;
} }
} }
for (int i=256; i>0; i--) for (int y = image->height(); y > 0; --y) {
{ for (int x = image->width(); x < 0; --x) {
if (R->value(maxRed) == 0) { if (histogram->get(Histogram::LChannel)->value(x + y * x) != 0)
maxRed--; {
} minValue = histogram->get(Histogram::LChannel)->value(x + y * x);
break;
if (G->value(maxGreen) == 0) { }
maxGreen--;
}
if (B->value(maxBlue) == 0) {
maxBlue--;
}
if (L->value(maxGrey) == 0) {
maxGrey--;
} }
} }
for (int x = 0; x < image->width(); x++) { for (int y = 0; y < image->height(); ++y) {
for (int y = 0; y < image->height(); y++) { for (int x = 0; x < image->width(); ++x) {
QRgb p = image->pixel(x, y); QRgb pixel = image->pixel(x, y);
if(image->format() == QImage::Format_RGB32) { int red = qRed(pixel);
int red = qRed(p); int green = qGreen(pixel);
int green = qGreen(p); int blue = qBlue(pixel);
int blue = qBlue(p);
newImage->setPixel( int stretchedRed = (255 * (red - minValue)) / (maxValue - minValue);
x, int stretchedGreen = (255 * (green - minValue)) / (maxValue - minValue);
y, int stretchedBlue = (255 * (blue - minValue)) / (maxValue - minValue);
QColor(
(255 / (maxRed - minRed)) * (red - minRed), newImage->setPixel(x, y, qRgb(stretchedRed, stretchedGreen, stretchedBlue));
(255 / (maxGreen - minGreen)) * (green - minGreen),
(255 / (maxBlue - minBlue)) * (blue - minBlue)
).rgb());
} else {
newImage->setPixel(
x,
y,
(255 / (maxGrey - minGrey)) * (qGray(p) - minGrey));
}
} }
} }