Have a look at Craig's Utility Library http://cul.codeplex.com/
Image manipulation available:
- Cropping, resizing, rotating, flipping
- To black and white or sepia tone
- Threshold and edge detection (including Sobel and Laplace)
- Text drawing, watermarks, object drawing helpers
- Taking a screenshot which spans monitors
- RGB Histograms
- Various convolution filters such as sharpen, sobel emboss, etc. along
with the ability to create your own
easily
- Various other filters such as "jitter", pixelate, sin wave, median
filter, and dilation, -red/green/blue
filters
- Multiple blurring techniques including box blur, Gaussian blur,
Kuwahara, and Symmetric Nearest
Neighbor blur
- Bump map and Normal map helpers
- ASCII art generator
- Adjust brightness, gamma, and contrast
Also you may like: OpenCVSharp and EmguCV - by the way, EmguCV the most advanced one.
