1. A method, comprising: merging a number of two or more images N of a same scene into an output image in an image processing system, by, determining an order of sharpness among the N images, the determining including identifying a sharpest image in the N images; determining vertical and horizontal offsets with respect to the sharpest image in the N images for other images in the N images and generating corresponding offset-free images; generating pixels of an intermediate image by combining corresponding pixels of the sharpest image and the offset-free images, the generating pixels of the intermediate image including calculating a weight of a pixel of an offset-free image based on a calculated standard deviation of noise and an absolute value of a difference between an intensity of the pixel and of a respective pixel of the sharpest image; and filtering noise from the intermediate image to generate the output image, the determining, generating and filtering being performed by one or more configured devices of the image processing system.