По наводке с RSDN-а, подборка алгоритмов обработки изображений (на C#):
http://softwarebydefault.com/2013/06/09/image-blur-filters/C# How to: Image Transform Rotate | Software by Default
C# How to: Image Transform Shear | Software by Default
C# How to: Compass Edge Detection | Software by Default
C# How to: Oil Painting and Cartoon Filter | Software by Default
C# How to: Stained Glass Image Filter | Software by Default
C# How to: Calculating Gaussian Kernels | Software by Default
C# How to: Image Cartoon Effect | Software by Default
C# How to: Boolean Edge Detection | Software by Default
C# How to: Morphological Edge Detection | Software by Default
C# How to: Image Erosion and Dilation | Software by Default
C# How to: Image Colour Average | Software by Default
C# How to: Image Unsharp Mask | Software by Default
C# How to: Image Median Filter | Software by Default
C# How to: Difference Of Gaussians | Software by Default
C# How to: Image Edge Detection | Software by Default
C# How to: Image Convolution | Software by Default
C# How to: Generate a Web Service from WSDL | Software by Default
C# How to: Decoding/Converting Base64 strings to Bitmap images | Software by Default
C# How to: Bitmap Colour Substitution implementing thresholds | Software by Default
C# How to: Swapping Bitmap ARGB Colour Channels | Software by Default
C# How to: Image filtering by directly manipulating Pixel ARGB values | Software by Default
C# How to: Image ASCII Art | Software by Default
C# How to: Weighted Difference of Gaussians | Software by Default
C# How to: Image Boundary Extraction | Software by Default