Image contrast enhancement

摘要

A method for contrast enhancement for digital images, including filtering an original image having original color values, to generate a filtered image, receiving parameters for a response curve, the response curve being a function of color value that is user-adjustable, deriving local multipliers by applying the response curve to the filtered image, multiplying the original color values by the local multipliers, thereby generating a contrast-enhanced image from the original image. A system and a computer-readable storage medium are also described.

主权项

1. A method for smoothing digital images, comprising operating on an original source image, I, comprising pixel values p(i, j) at respective pixel locations (i, j), to produce a smoothed image, Ismoothed, comprising pixel values psmoothed(i, j) at respective pixel locations (i, j), wherein for each pixel location (i, j) the smoothed pixel value psmoothed(i, j) is computed as a weighted average of the corresponding pixel value p(i, j) with at least one pixel window average of I, and wherein the pixel window averages of I are each used for the weighted average at more than one pixel location (i, j).