1. An imaging sensor comprising: a photo sensor array comprising a plurality of photo pixel sites arranged in an array, each photo pixel site comprising a photo sensor and a neutral density filter attached thereon filtering the photo sensor, each neutral density filter having a density value, the density values of the neutral density filters being graduated over a range of densities; the photo sensor array being linearly movable, wherein when the photo sensor array is moved across an image, each point in the image is exposed to at least one pixel site having a filter with each of the graduated density values, such that when each of the photo pixel sites of the array is exposed to a same light input during a time span of exposure, the image is captured at a plurality of exposure values within a defined range.