MULTI LAYERED IMAGE ENHANCEMENT TECHNIQUE

摘要

A system for enhancing an input image including receiving an input image and filtering the input image with a plurality of non-linear smoothing filters providing a respective plurality of filtered outputs. The system processes a plurality of the filtered outputs with respect to at least one of another of the filtered outputs and the input image to determine a plurality of detail layers. The system filters the plurality of detail layers with a plurality of non-linear smoothing filters providing a respective plurality of smoothed layers. The system adjusts the plurality of smoothed layers in such a manner that regions closer to an edge are enhanced to a lesser extent than regions farther from an edge and combining the adjusted the smoothed layers to provide an enhanced output image.

主权项

1. A method for enhancing an input image comprising:
(a) receiving an input image; (b) filtering said input image with a first non-linear filter that attenuates regions of said input image proximate edges to an extent less than regions of said input image not said proximate said edges to provide a first filtered image; (c) processing said first filtered image by determining a comparison between said first filtered image and said input image to provide a difference filtered image; (d) filtering said difference filtered image with a second non-linear filter that reduces the amount of noise in said difference filtered image in a manner not dependent on the content of said difference filtered image to provide a second filtered image; (e) processing said second filtered image by determining a comparison between said second filtered image and said input image to provide an enhanced output image.