1. An image processing method comprising; obtaining a first underexposed and sharp image of a scene; obtaining a second image relatively well exposed and blurred compared to said first image, nominally of the same scene, wherein said second image is acquired at a different exposure time than said first image; scanning across said first and second images to: provide a portion of said first image as an input signal to an adaptive filter; provide a corresponding portion of said second image as a desired signal to said adaptive filter; and calculate filter coefficients for said portion of said images at a given scanning location based on a combination of said input signal, said desired signal and existing filter coefficients for said scanning location; and adaptively filter said input signal based on said filter coefficients to produce an output signal and constructing a first filtered image from said output signal, less blurred than said second image.