Shape description by image moments is a popular topic in image processing. Standard geometric moments are based on a non-orthogonal basis, which has introduced some problems for image reconstruction. Orthogonal moments such as Zernike and Legendre Moments which use orthogonal polynomials have been introduced to overcome this problem. These however are based on continuous polynomials, and are not really suited to digital images processing which is inherently rooted in a discrete domain. Hence, a new type of discrete orthogonal moments, based on Tchebichef polynomials has emerged.

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I've recently been battling with an algorithm, or rather bugs in my implementation of an algorithm, to isolate homogeneous regions in an image. Homogeneous regions? By this we mean areas of identical intensity (the pixel values are the same). As humans we can do this easily; but for a computer, it's harder than it might seem at first... read more...

I need to store some objects in a linked list. Objective-C has a number of container classes NSArray, NSDictionary and NSSet - but I really want a linked list. As I come to Objective-C from a C++ background, I was thinking that this would be where I would use templates, so that I can store any type of in my container. But Objective-C doesn't use templates, it does however have id. read more...