Method and system for real-time noise removal and image enhancement of high-dynamic range images
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United States of America Patent
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Jun 2, 2020
Grant Date -
Feb 22, 2018
app pub date -
Mar 2, 2016
filing date -
Mar 5, 2015
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Abstract
A method and system for real-time noise removal and image enhancement of high-dynamic range (HDR) images. The method includes receiving an HDR input image I and operating processing circuitry for (i) applying a first edge-preserving filter (e.g. guided filter) to the input image I, thereby generating a first image component B1 and a first set of linear coefficients āi,1; (ii) applying a second edge-preserving filter (e.g. guided filter) to the input image I, thereby generating a second image component B2 and a second set of linear coefficients āi,2; (iii) generating a plausibility mask P from a combination of the first set of linear coefficients āi,1 and the second set of linear coefficients āi,2, the plausibility mask P indicating spatial detail within the input image I; and (iv) generating an output image O based on first image component B1, the second image component B2 and the plausibility mask P.
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