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Abstract

A method includes (a) performing image deblur at the original size of underexposed and normally exposed images when their original image size is small. Otherwise, the method includes (b) downsizing the images and performing image deblur on the downsized images. The image deblur on downsized images includes (c) applying a global color transfer between the images if their difference of average gray values is small. Otherwise, the method includes four successive sub-procedures: (d) histogram customizing of the underexposed image based on the normally exposed image; (e) region segmentation for the histogram-customized underexposed image and local alignment of regions in the histogram-customized underexposed image with the normally exposed image; (f) color tuning for the histogram-customized underexposed image based on the local alignment and a global alignment between the underexposed and the normally exposed images; and (g) local color transfer with multi-size neighbor windows from between the images.

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First Claim