QImage ribi::HistogramEqualizationerMainDialog::DoHistogramEqualization(const QImage& source) noexcept
{
QImage image(source);
const int width = image.width();
const int height = image.height();
const int surface = width * height;
const int nGreyValues = 256; //There are 256 different pixel intensities
const std::vector<int> histogram = GetImageHistogram(image);
assert(nGreyValues==static_cast<int>(histogram.size()));
const std::vector<int> cumulativeHistogram = GetCumulativeHistogram(histogram);
assert(nGreyValues==static_cast<int>(cumulativeHistogram.size()));
//Works, but anybody knows how to use std::for_each or std::transform for this?
std::vector<int> rescaledHistogram(nGreyValues,0);
for (int i=0; i!=nGreyValues; ++i)
{
//'surface + 1' to prevent that rescaledGreyValue == 256
const int rescaledGreyValue
= static_cast<int>(
static_cast<double>(nGreyValues)
* static_cast<double>(cumulativeHistogram[i])
/ static_cast<double>(surface + 1) );
assert(rescaledGreyValue >= 0);
assert(rescaledGreyValue < 256);
rescaledHistogram[i] = rescaledGreyValue;
}
for (int y=0; y!=height; ++y)
{
for (int x=0; x!=width; ++x)
{
const QRgb rgb { image.pixel(x,y) };
const int grey {
( qRed(rgb) + qGreen(rgb) + qBlue(rgb) ) / 3
};
assert(grey >= 0);
assert(grey < 256);
const int greyNew = rescaledHistogram[grey];
assert(greyNew >= 0);
assert(greyNew < 256);
image.setPixel(x,y,qRgb(greyNew,greyNew,greyNew));
}
}
return image;
}
gboolean isTennisFree()
{
gboolean
res = FALSE;
ExceptionInfo
*exception;
Image
*image;
ImageInfo
*image_info;
unsigned long
colors;
ColorPacket
*histogram;
unsigned long
i = 0;
char*
img_path = "video.jpg";
getImg();
exception = AcquireExceptionInfo();
image_info = CloneImageInfo((ImageInfo *) NULL);
strcpy(image_info->filename, img_path);
image = ReadImage(image_info,exception);
if (exception->severity != UndefinedException)
{
CatchException(exception);
}
if (image == (Image *) NULL)
{
return FALSE;
//exit(1);
}
histogram = GetImageHistogram(image, &colors, exception);
qsort((void *) histogram, (size_t) colors, sizeof(*histogram), myHistogramCompare);
if (histogram == (ColorPacket*) NULL)
{
MagickError(exception->severity, exception->reason, exception->description);
}
if(colors > 0)
{
if(histogram[i].count > 5000
&& ScaleQuantumToChar(RoundToQuantum(histogram[i].pixel.red)) < 35
&& ScaleQuantumToChar(RoundToQuantum(histogram[i].pixel.green)) < 35
&& ScaleQuantumToChar(RoundToQuantum(histogram[i].pixel.blue)) < 35)
{
res = TRUE;
printf("Empty\n");
}
else
{
res = FALSE;
printf("Busy\n");
}
// printf("%d %d %d %d\n", (int)histogram[i].count, ScaleQuantumToChar(RoundToQuantum(histogram[i].pixel.red)), ScaleQuantumToChar(RoundToQuantum(histogram[i].pixel.green)), ScaleQuantumToChar(RoundToQuantum(histogram[i].pixel.blue)));
}
// remove(img_path);
histogram = (ColorPacket *) RelinquishMagickMemory(histogram);
DestroyImage(image);
image_info=DestroyImageInfo(image_info);
exception=DestroyExceptionInfo(exception);
return res;
}
int main(int argc,char **argv)
{
ExceptionInfo
*exception;
Image
*image;
ImageInfo
*image_info;
unsigned long
colors;
ColorPacket
*histogram;
unsigned long
i = 0;
char*
img_path = "video.jpg";
getImg();
MagickCoreGenesis(*argv,MagickTrue);
exception = AcquireExceptionInfo();
image_info = CloneImageInfo((ImageInfo *) NULL);
strcpy(image_info->filename, img_path);
image = ReadImage(image_info,exception);
if (exception->severity != UndefinedException)
{
CatchException(exception);
}
if (image == (Image *) NULL)
{
exit(1);
}
histogram = GetImageHistogram(image, &colors, exception);
qsort((void *) histogram, (size_t) colors, sizeof(*histogram), myHistogramCompare);
if (histogram == (ColorPacket*) NULL)
{
MagickError(exception->severity, exception->reason, exception->description);
}
if(colors > 0)
{
if(histogram[i].count > 10000
&& ScaleQuantumToChar(RoundToQuantum(histogram[i].pixel.red)) < 35
&& ScaleQuantumToChar(RoundToQuantum(histogram[i].pixel.green)) < 35
&& ScaleQuantumToChar(RoundToQuantum(histogram[i].pixel.blue)) < 35)
{
printf("Empty\n");
}
else
{
printf("Busy\n");
}
// printf("%u %d %d %d\n", histogram[i].count, ScaleQuantumToChar(RoundToQuantum(histogram[i].pixel.red)), ScaleQuantumToChar(RoundToQuantum(histogram[i].pixel.green)), ScaleQuantumToChar(RoundToQuantum(histogram[i].pixel.blue)));
}
remove(img_path);
histogram = (ColorPacket *) RelinquishMagickMemory(histogram);
DestroyImage(image);
image_info=DestroyImageInfo(image_info);
exception=DestroyExceptionInfo(exception);
MagickCoreTerminus();
return(0);
}