private List <Bitmap> CLHSL(Bitmap bmp)
{
if (CLCalc.CLAcceleration == CLCalc.CLAccelerationType.Unknown)
{
CLCalc.InitCL();
}
if (CLCalc.CLAcceleration != CLCalc.CLAccelerationType.UsingCL)
{
return(null);
}
InitKernels();
if (CLBmpSaturation == null)
{
CLBmpSaturation = new CLCalc.Program.Image2D(bmp);
CLBmpIntens = new CLCalc.Program.Image2D(bmp);
}
if (CLbmp == null || CLbmp.Height != bmp.Height || CLbmp.Width != bmp.Width)
{
CLbmp = new CLCalc.Program.Image2D(bmp);
CLNewBmp = new CLCalc.Program.Image2D(bmp);
CLBmpSaturation = new CLCalc.Program.Image2D(bmp);
CLBmpIntens = new CLCalc.Program.Image2D(bmp);
}
else
{
CLbmp.WriteBitmap(bmp);
CLN.WriteToDevice(new int[] { NLumIntens });
CLWidth.WriteToDevice(new int[] { bmp.Width });
CLHeight.WriteToDevice(new int[] { bmp.Height });
}
kernelComputeHue.Execute(new CLCalc.Program.MemoryObject[] { CLbmp, CLNewBmp, CLBmpSaturation, CLBmpIntens }, new int[] { bmp.Width, bmp.Height });
return(new List <Bitmap>()
{
CLNewBmp.ReadBitmap(), CLBmpSaturation.ReadBitmap(), CLBmpIntens.ReadBitmap()
});
}
/// <summary>Equalizes image histogram using OpenCL</summary>
private void CLEqualizeHistogram(ref Bitmap bmp)
{
if (CLCalc.CLAcceleration == CLCalc.CLAccelerationType.Unknown)
{
CLCalc.InitCL();
}
if (CLCalc.CLAcceleration != CLCalc.CLAccelerationType.UsingCL)
{
return;
}
float[] PartialHistograms = new float[NLumIntens * bmp.Width];
float[] histLuminance = new float[NLumIntens];
if (kernelComputeHistograms == null || CLN == null || CLHistogram == null)
{
CLHistogram = new CLCalc.Program.Variable(histLuminance);
CLPartialHistograms = new CLCalc.Program.Variable(PartialHistograms);
}
InitKernels();
System.Diagnostics.Stopwatch swTotal = new System.Diagnostics.Stopwatch();
System.Diagnostics.Stopwatch swCopyBmp = new System.Diagnostics.Stopwatch();
System.Diagnostics.Stopwatch swRescaling = new System.Diagnostics.Stopwatch();
System.Diagnostics.Stopwatch swComputeHistPartial = new System.Diagnostics.Stopwatch();
System.Diagnostics.Stopwatch swComputeHistConsolid = new System.Diagnostics.Stopwatch();
System.Diagnostics.Stopwatch swHistIntegral = new System.Diagnostics.Stopwatch();
swTotal.Start();
swCopyBmp.Start();
if (CLbmp == null || CLbmp.Height != bmp.Height || CLbmp.Width != bmp.Width)
{
CLbmp = new CLCalc.Program.Image2D(bmp);
CLNewBmp = new CLCalc.Program.Image2D(bmp);
CLPartialHistograms = new CLCalc.Program.Variable(PartialHistograms);
}
else
{
CLbmp.WriteBitmap(bmp);
CLN.WriteToDevice(new int[] { NLumIntens });
CLWidth.WriteToDevice(new int[] { bmp.Width });
CLHeight.WriteToDevice(new int[] { bmp.Height });
}
swCopyBmp.Stop();
swComputeHistPartial.Start();
//Partial histograms
CLCalc.Program.MemoryObject[] args = new CLCalc.Program.MemoryObject[] { CLbmp, CLPartialHistograms, CLHeight, CLN };
kernelComputeHistograms.Execute(args, bmp.Width);
CLCalc.Program.Sync();
swComputeHistPartial.Stop();
swComputeHistConsolid.Start();
args = new CLCalc.Program.MemoryObject[] { CLPartialHistograms, CLHistogram, CLHeight, CLN };
kernelConsolidateHist.Execute(args, NLumIntens);
CLHistogram.ReadFromDeviceTo(histLuminance);
swComputeHistConsolid.Stop();
swHistIntegral.Start();
//Perform histogram integration - better performance in CPU
//Compute histogram integrals in-place
for (int i = 1; i < NLumIntens; i++)
{
histLuminance[i] += histLuminance[i - 1];
}
float scale = 0.9f / histLuminance[NLumIntens - 1];
//Scales histograms
for (int i = 0; i < NLumIntens; i++)
{
histLuminance[i] *= scale;
}
//Writes histogram integral
CLHistogram.WriteToDevice(histLuminance);
swHistIntegral.Stop();
swRescaling.Start();
//Computes equalized image
args = new CLCalc.Program.MemoryObject[] { CLbmp, CLNewBmp, CLHistogram, CLN };
kernelPerformNormalization.Execute(args, new int [] { bmp.Width, bmp.Height });
bmp = CLNewBmp.ReadBitmap();
swRescaling.Stop();
swTotal.Stop();
}
