Dynamic range compression

Details Dynamic range compression Dynamic range compression

2005-12-06

2005-12-06

Couso, Yon J. (Department: 2625)

Image analysis

Image enhancement or restoration

Image filter

C382S262000

Reexamination Certificate

active

06973218

ABSTRACT:
A method and apparatus for processing image data is described, comprising acquiring a frame of image data and compressing the dynamic range of the frame of image data using a dynamic range compression (DRC) algorithm that utilizes down-sampling, median filtering, and up-sampling. The DRC algorithm comprises down-sampling a frame of image data comprising a first array of pixels to generate a second array of pixels, applying a first median filter to the second array of pixels to generate a blurred array of pixels, up-sampling the blurred array of pixels, and removing at least a portion of low-frequency gradient data generated by previous steps from the frame of image data.

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Erik Meijering, “TransformJ: A Java Package for Geometrical Image Transformation,” “TransformJ: Affine,” 5 pages, retrieved from the Internet on Apr. 15, 2004, http://imagescience.bigr.nl/meijering/software/transformj/index.html and http://imagescience.bigr.nl/meijering/software/transformj/affine.html.

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