The present disclosure relates to a method and system for processing an image extracted from a document. The image processing system detects one or more edges of the image and determines a missing edge in the image by comparing color gradients of the edges. The missing edges are recreated by cloning image pixels based on data pixels of an edge, opposite to the missing edge, amongst the one or more edges to obtain a reconstructed image. Outer corner points in the reconstructed image are identified based on quadratic corner points, wherein the quadratic corner points are determined based on the one or more edges and the reconstructed edge. Further, the image processing system performs an image perspective correction on the reconstructed image, based on the outer corner points, to obtain a processed image.