A New Scale Invariant Optimized Chain Code for Nastaliq Character Representation

Scale invariant code is a code that will remain identical even when we change the scale of an object means when we scale in/out, the output chain code will remain same, so it can be used in object representation and recognition. The algorithm is developed for Nastaliq characters, but is it general in nature and can be used for boundary representation of any object. The basic idea is that instead of storing and computing the chain code of each pixel, we create segments by using corner points and develop a new code for the segments not for pixels, and that code will be scale invariant and of course will be much shorter than the chain code. A segment is a portion between two corner points; as the ratio between segments will remain same even when we change the scale of image, so we compute the ratio of each segment to the whole image, and will finally compute optimized scale invariant code.