public Bitmap Calculate(GradientTypeEnum gradientType, int threshold)
{
Bitmap grayBitmap = new Bitmap(_bitmap.Width, _bitmap.Height);
for (int i = 0; i < _bitmap.Width; i++)
{
for (int j = 0; j < _bitmap.Height; j++)
{
//得到像素的原始色彩
var oColor = _bitmap.GetPixel(i, j);
//得到该色彩的亮度
var brightness = oColor.GetBrightness();
//用该亮度计算灰度
var gRGB = (int)(brightness * 255);
//组成灰度色彩
var gColor = Color.FromArgb(gRGB, gRGB, gRGB);
//最后将该灰度色彩赋予该像素
grayBitmap.SetPixel(i, j, gColor);
}
}
var gradientTemplate = Gradient.GetGradientTemplate(gradientType);
var destBitmap = EdgeDectect(grayBitmap, gradientTemplate, threshold);
return(destBitmap);
}
public static int[,] GetGradientTemplate(GradientTypeEnum gradientType)
{
int[,] gradientTemplate = null;
switch (gradientType)
{
case GradientTypeEnum.Lapacian:
{
gradientTemplate = Lapacian;
break;
}
case GradientTypeEnum.Sobel_Horizontal:
{
gradientTemplate = Sobel_Horizontal;
break;
}
case GradientTypeEnum.Sobel_Vertical:
{
gradientTemplate = Sobel_Vertical;
break;
}
case GradientTypeEnum.Sobel_Diagonal1:
{
gradientTemplate = Sobel_Diagonal1;
break;
}
case GradientTypeEnum.Sobel_Diagonal2:
{
gradientTemplate = Sobel_Diagonal2;
break;
}
case GradientTypeEnum.Prewitt_Horizontal:
{
gradientTemplate = Prewitt_Horizontal;
break;
}
case GradientTypeEnum.Prewitt_Vertical:
{
gradientTemplate = Prewitt_Vertical;
break;
}
case GradientTypeEnum.Prewitt_Diagonal1:
{
gradientTemplate = Prewitt_Diagonal1;
break;
}
case GradientTypeEnum.Prewitt_Diagonal2:
{
gradientTemplate = Prewitt_Diagonal2;
break;
}
default:
break;
}
return(gradientTemplate);
}
