/// <summary>
/// Applies Sobel filter to the image.
/// </summary>
/// <param name="image">The image to modify.</param>
/// <returns>Returns the edge map of the image.</returns>
public static Bitmap ApplySobelFilter(this ImageFilter imageFilter, Bitmap image)
{
var memory = CreateSimpleMemory(
image,
1, 2, 1,
0, 0, 0,
-1, -2, -1);
imageFilter.FilterImage(memory);
return(CreateImage(memory, image));
}
/// <summary>
/// Applies a vertical edge detection filter to the image.
/// </summary>
/// <param name="image">The image to modify.</param>
/// <returns>Returns the edge map of the image containing only vertical edges.</returns>
public static Bitmap DetectVerticalEdges(this ImageFilter imageFilter, Bitmap image)
{
var memory = CreateSimpleMemory(
image,
1, 0, -1,
1, 0, -1,
1, 0, -1);
imageFilter.FilterImage(memory);
return(CreateImage(memory, image));
}
/// <summary>
/// Applies Gauss filter to an image.
/// </summary>
/// <param name="image">The image to modify.</param>
/// <returns>Returns the smoothed image.</returns>
public static Bitmap ApplyGaussFilter(this ImageFilter imageFilter, Bitmap image)
{
var memory = CreateSimpleMemory(
image,
1, 2, 1,
2, 4, 2,
1, 2, 1,
16);
imageFilter.FilterImage(memory);
return(CreateImage(memory, image));
}