private void buttonHDR_Click(object sender, RoutedEventArgs e)
{
var watch = System.Diagnostics.Stopwatch.StartNew();
labelOutput.Content = "";
OpenFileDialog dialog = new OpenFileDialog
{
Filter = "Image files (*.jpg, *.jpeg, *.jpe, *.jfif) | *.jpg; *.jpeg; *.jpe; *.jfif",
Title = "Please select image",
Multiselect = true
};
if (dialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
// Load images
MyImage[] images = loadImages(dialog.FileNames);
// Get parameters
int smoothfactor = (int)getParamater(textboxSmoothFactor);
int samples = (int)getParamater(textboxSample);
// Display images
drawImages(images);
// Process images
HDResult hdrResult = ImageProcessing.HDR(images, smoothfactor, samples);
// Draw response graphs
drawReponsesGraph(hdrResult.response);
// Save HDR image
HDRImage = hdrResult.HDR;
MyImage tempImage = HDRImage.ToMyImage();
// Show HDR image
processedImage.Source = Utils.getSource(tempImage.GetBitmap());
// Create histograms
displayHistograms(tempImage);
}
watch.Stop();
string timeTaken = String.Format(" HDR {0} ms", watch.ElapsedMilliseconds.ToString());
Console.WriteLine(timeTaken);
labelOutput.Content += timeTaken;
}
// ============================================
// HDR
// ============================================
public static HDResult HDR(MyImage[] images, int smoothfactor, int samples)
{
// Prepare data
int imagesCount = images.Length;
int width = images[0].width;
int height = images[0].height;
int numCh = images[0].numCh;
// Create random points for samples
Random random = new Random();
int[] randomX = new int[samples];
int[] randomY = new int[samples];
for (int i = 0; i < samples; ++i)
{
randomX[i] = random.Next(width);
randomY[i] = random.Next(height);
}
// Get sample pixels and exposure time
Pixel[][] imagesSamples = new Pixel[imagesCount][];
double[] exposureTime = new double[imagesCount];
for (int i = 0; i < imagesCount; ++i)
{
imagesSamples[i] = images[i].getSamples(samples, randomX, randomY);
exposureTime[i] = images[i].exposureTime;
}
// Process each channel
HDResult hdrResult = new HDResult(new MyImageDouble(width, height, numCh));
Parallel.For(0, numCh, ch =>
{
hdrResult.response[ch] = GSolve(imagesSamples, exposureTime, smoothfactor, ch);
hdrResult.HDR.bitplane[ch] = RadianceMap(getChannelFromimages(images, ch), hdrResult.response[ch], width, height, numCh);
});
hdrResult.HDR.log();
hdrResult.HDR.normalize();
hdrResult.HDR.divide(hdrResult.HDR.findMax());
hdrResult.HDR.multiply(255.0);
return(hdrResult);
}
