Raised cosine function for image data interpolation

Abstract Spline functions because of their smoothing and interpolating properties are gaining popularity in engineering applications and image processing. In the present paper a new set of functions is proposed which has all the useful properties of spline function but are more smooth and are practically a band-limited type. These functions are the convolved raised cosine functions. The performance of image data reconstruction through the raised cosine functions is found to be better than that of spline functions for the two representative images.