// Selection changed in component combo
private void componentCombo_SelectedIndexChanged(object sender, System.EventArgs e)
{
AForge.Math.ContinuousHistogram h = null;
DoubleRange input = new DoubleRange(0, 1);
DoubleRange output = new DoubleRange(0, 1);
if (componentCombo.SelectedIndex == 0)
{
// satureation
h = imgStat.Saturation;
input = inSaturation;
output = outSaturation;
}
else
{
// luminance
h = imgStat.Luminance;
input = inLuminance;
output = outLuminance;
}
histogram.Values = h.Values;
inMinBox.Text = input.Min.ToString("F3");
inMaxBox.Text = input.Max.ToString("F3");
outMinBox.Text = output.Min.ToString("F3");
outMaxBox.Text = output.Max.ToString("F3");
// input slider
inSlider.Min = (int)(input.Min * 255);
inSlider.Max = (int)(input.Max * 255);
// output slider
outSlider.Min = (int)(output.Min * 255);
outSlider.Max = (int)(output.Max * 255);
}
// Selection changed in component combo
private void componentCombo_SelectedIndexChanged(object sender, System.EventArgs e)
{
AForge.Math.ContinuousHistogram h = null;
DoubleRange input = new DoubleRange(0, 1);
DoubleRange output = new DoubleRange(0, 1);
double start = 0;
switch (componentCombo.SelectedIndex)
{
case 0:
// Y
h = imgStat.Y;
input = inY;
output = outY;
break;
case 1:
// Cb
h = imgStat.Cb;
input = inCb;
output = outCb;
start = -0.5;
break;
case 2:
// Cr
h = imgStat.Cr;
input = inCr;
output = outCr;
start = -0.5;
break;
}
histogram.Values = h.Values;
inMinBox.Text = input.Min.ToString("F3");
inMaxBox.Text = input.Max.ToString("F3");
outMinBox.Text = output.Min.ToString("F3");
outMaxBox.Text = output.Max.ToString("F3");
// input slider
inSlider.Min = (int)((input.Min - start) * 255);
inSlider.Max = (int)((input.Max - start) * 255);
// output slider
outSlider.Min = (int)((output.Min - start) * 255);
outSlider.Max = (int)((output.Max - start) * 255);
}
// Gather statistics for the specified image
private unsafe void ProcessImage( UnmanagedImage image, byte* mask, int maskLineSize )
{
// get image dimension
int width = image.Width;
int height = image.Height;
pixels = pixelsWithoutBlack = 0;
int[] s = new int[256];
int[] l = new int[256];
int[] swb = new int[256];
int[] lwb = new int[256];
RGB rgb = new RGB( );
HSL hsl = new HSL( );
int pixelSize = ( image.PixelFormat == PixelFormat.Format24bppRgb ) ? 3 : 4;
int offset = image.Stride - width * pixelSize;
int maskOffset = maskLineSize - width;
// do the job
byte * p = (byte*) image.ImageData.ToPointer( );
if ( mask == null )
{
// for each line
for ( int y = 0; y < height; y++ )
{
// for each pixel
for ( int x = 0; x < width; x++, p += pixelSize )
{
rgb.Red = p[RGB.R];
rgb.Green = p[RGB.G];
rgb.Blue = p[RGB.B];
// convert to HSL color space
AForge.Imaging.HSL.FromRGB( rgb, hsl );
s[(int) ( hsl.Saturation * 255 )]++;
l[(int) ( hsl.Luminance * 255 )]++;
pixels++;
if ( hsl.Luminance != 0.0 )
{
swb[(int) ( hsl.Saturation * 255 )]++;
lwb[(int) ( hsl.Luminance * 255 )]++;
pixelsWithoutBlack++;
}
}
p += offset;
}
}
else
{
// for each line
for ( int y = 0; y < height; y++ )
{
// for each pixel
for ( int x = 0; x < width; x++, p += pixelSize, mask++ )
{
if ( *mask == 0 )
continue;
rgb.Red = p[RGB.R];
rgb.Green = p[RGB.G];
rgb.Blue = p[RGB.B];
// convert to HSL color space
AForge.Imaging.HSL.FromRGB( rgb, hsl );
s[(int) ( hsl.Saturation * 255 )]++;
l[(int) ( hsl.Luminance * 255 )]++;
pixels++;
if ( hsl.Luminance != 0.0 )
{
swb[(int) ( hsl.Saturation * 255 )]++;
lwb[(int) ( hsl.Luminance * 255 )]++;
pixelsWithoutBlack++;
}
}
p += offset;
mask += maskOffset;
}
}
// create histograms
saturation = new ContinuousHistogram( s, new Range( 0, 1 ) );
luminance = new ContinuousHistogram( l, new Range( 0, 1 ) );
saturationWithoutBlack = new ContinuousHistogram( swb, new Range( 0, 1 ) );
luminanceWithoutBlack = new ContinuousHistogram( lwb, new Range( 0, 1 ) );
}
// Gather statistics for the specified image
private unsafe void ProcessImage(UnmanagedImage image, byte* mask, int maskLineSize)
{
// get image dimension
int width = image.Width;
int height = image.Height;
pixels = pixelsWithoutBlack = 0;
int[] yhisto = new int[256];
int[] cbhisto = new int[256];
int[] crhisto = new int[256];
int[] yhistoWB = new int[256];
int[] cbhistoWB = new int[256];
int[] crhistoWB = new int[256];
RGB rgb = new RGB();
YCbCr ycbcr = new YCbCr();
int pixelSize = (image.PixelFormat == PixelFormat.Format24bppRgb) ? 3 : 4;
int offset = image.Stride - width * pixelSize;
int maskOffset = maskLineSize - width;
// do the job
byte* p = (byte*)image.ImageData.ToPointer();
if (mask == null)
{
// for each line
for (int y = 0; y < height; y++)
{
// for each pixel
for (int x = 0; x < width; x++, p += pixelSize)
{
rgb.Red = p[RGB.R];
rgb.Green = p[RGB.G];
rgb.Blue = p[RGB.B];
// convert to YCbCr color space
AForge.Imaging.YCbCr.FromRGB(rgb, ycbcr);
yhisto[(int)(ycbcr.Y * 255)]++;
cbhisto[(int)((ycbcr.Cb + 0.5) * 255)]++;
crhisto[(int)((ycbcr.Cr + 0.5) * 255)]++;
pixels++;
if ((ycbcr.Y != 0.0) || (ycbcr.Cb != 0.0) || (ycbcr.Cr != 0.0))
{
yhistoWB[(int)(ycbcr.Y * 255)]++;
cbhistoWB[(int)((ycbcr.Cb + 0.5) * 255)]++;
crhistoWB[(int)((ycbcr.Cr + 0.5) * 255)]++;
pixelsWithoutBlack++;
}
}
p += offset;
}
}
else
{
// for each line
for (int y = 0; y < height; y++)
{
// for each pixel
for (int x = 0; x < width; x++, p += pixelSize, mask++)
{
if (*mask == 0)
continue;
rgb.Red = p[RGB.R];
rgb.Green = p[RGB.G];
rgb.Blue = p[RGB.B];
// convert to YCbCr color space
AForge.Imaging.YCbCr.FromRGB(rgb, ycbcr);
yhisto[(int)(ycbcr.Y * 255)]++;
cbhisto[(int)((ycbcr.Cb + 0.5) * 255)]++;
crhisto[(int)((ycbcr.Cr + 0.5) * 255)]++;
pixels++;
if ((ycbcr.Y != 0.0) || (ycbcr.Cb != 0.0) || (ycbcr.Cr != 0.0))
{
yhistoWB[(int)(ycbcr.Y * 255)]++;
cbhistoWB[(int)((ycbcr.Cb + 0.5) * 255)]++;
crhistoWB[(int)((ycbcr.Cr + 0.5) * 255)]++;
pixelsWithoutBlack++;
}
}
p += offset;
mask += maskOffset;
}
}
// create histograms
yHistogram = new ContinuousHistogram(yhisto, new Range(0.0f, 1.0f));
cbHistogram = new ContinuousHistogram(cbhisto, new Range(-0.5f, 0.5f));
crHistogram = new ContinuousHistogram(crhisto, new Range(-0.5f, 0.5f));
yHistogramWithoutBlack = new ContinuousHistogram(yhistoWB, new Range(0.0f, 1.0f));
cbHistogramWithoutBlack = new ContinuousHistogram(cbhistoWB, new Range(-0.5f, 0.5f));
crHistogramWithoutBlack = new ContinuousHistogram(crhistoWB, new Range(-0.5f, 0.5f));
}
