Humans are sensitive to edges and the contrast of images.We propose a novel image zooming method which preserves the edges and enhances the contrast of an image synchronously. In our system

images are reconstructed by solving a Poisson equation after Canny edges detection

gradients scaling and smoothing on edges. The gradients along the image edges are scaled

which preserves the edges for image scaling. Our method not only preserves the image edges

but also enhances the image contrast which reveals more image details. This method is easy to implement

and can be applied to several areas such as image scaling and contrast enhancement.