/// <summary>
/// Measures the sharpness.
/// </summary>
/// <param name="currentImage">The current image.</param>
/// <param name="ScaleVal">The scale val.</param>
/// <returns></returns>
public HTuple MeasureSharpness(HImage currentImage, HTuple ScaleVal)
{
HTuple hv_Sharpness = new HTuple();
try
{
if (currentImage.CountChannels() == 3)
{
currentImage = currentImage.Rgb1ToGray();
}
string hv_Type = null;
int hv_Width = 0;
int hv_Height = 0;
IntPtr imagePtr = currentImage.GetImagePointer1(out hv_Type, out hv_Width, out hv_Height);
HImage ho_ImageZoomed = new HImage();
HImage ho_ImageFFT = new HImage();
HImage ho_ImageCorrelation = new HImage();
HImage ho_ImageFFTInv = new HImage();
HTuple hv_ZoomedWidth;
HTuple hv_ZoomedHeight;
HTuple IRow = new HTuple(4);
HTuple ICol = new HTuple(4);
HTuple hv_SumCorrelation;
ho_ImageZoomed = currentImage.ZoomImageFactor(ScaleVal, ScaleVal, "constant");
ho_ImageZoomed.GetImageSize(out hv_ZoomedWidth, out hv_ZoomedHeight);
ho_ImageFFT = ho_ImageZoomed.RftGeneric("to_freq", "none", "complex", hv_ZoomedWidth);
ho_ImageCorrelation = ho_ImageFFT.CorrelationFft(ho_ImageFFT);
ho_ImageFFTInv = ho_ImageCorrelation.RftGeneric("from_freq", "n", "real", hv_ZoomedWidth);
IRow[0] = 0;
IRow[1] = 1;
IRow[2] = hv_ZoomedHeight - 1;
IRow[3] = hv_ZoomedHeight - 2;
ICol[0] = 1;
ICol[1] = 0;
ICol[2] = hv_ZoomedWidth - 2;
ICol[3] = hv_ZoomedWidth - 1;
hv_SumCorrelation = ho_ImageFFTInv.GetGrayval(IRow, ICol);
HTuple hv_Mean;
HTuple hv_Deviation;
hv_Mean = ho_ImageZoomed.Intensity(ho_ImageZoomed, out hv_Deviation);
HTuple hv_Blurness;
hv_Blurness = ((hv_SumCorrelation / (hv_ZoomedWidth * hv_ZoomedHeight)) - (hv_Mean * hv_Mean)) / (hv_Deviation * hv_Deviation);
hv_Sharpness = 1000.0 - ((hv_Blurness.TupleMin()) * 1000.0);
hv_Sharpness = hv_Sharpness * 100;
hv_Sharpness = hv_Sharpness.TupleRound();
hv_Sharpness = hv_Sharpness.TupleReal();
hv_Sharpness = hv_Sharpness / 100;
}
catch (Exception ex)
{
SetFocusStatusMessage(ex.Message, Color.Pink);
//this.lblFocusStatus.Text = ex.Message;
//this.lblFocusStatus.BackColor = Color.Pink;
}
return(hv_Sharpness);
}