... A new method for the discrimination of point-like objects in astronomical images is presented. The method makes use of the surface curvature of the image, without any a priori knowledge of the shape of the point-like objects. ... We propose a new approach to the problem based on the properties of surface curvature which is related to peaks, pits and flats in images and therefore contain the key information to discriminate point-like objects. ... The image of means is called the analysis image. ...