US 12,266,084 B2
Methods and systems for improving a quality of digital images
Neil Woodall, Newport Beach, CA (US)
Assigned to PIXELWORKS SEMICONDUCTOR TECHNOLOGY (SHANGHAI) CO. LTD., Shanghai (CN)
Filed by Pixelworks Semiconductor Technology (Shanghai) Co., Ltd., Shanghai (CN)
Filed on Oct. 18, 2021, as Appl. No. 17/451,252.
Prior Publication US 2023/0117976 A1, Apr. 20, 2023
Int. Cl. G06T 5/40 (2006.01); G06T 3/4053 (2024.01); G06T 5/20 (2006.01); G06T 5/92 (2024.01)
CPC G06T 5/40 (2013.01) [G06T 3/4053 (2013.01); G06T 5/20 (2013.01); G06T 5/92 (2024.01); G06T 2207/20072 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for processing a digital image comprising:
generating a higher resolution histogram from the digital image, the higher resolution histogram generated from a lower resolution histogram of raw image data of the digital image;
filtering the higher resolution histogram;
downsampling the filtered, higher resolution histogram to form a downsampled histogram;
generating one or more picture quality adjustments based on the downsampled histogram;
applying the one or more picture quality adjustments to the raw image data of the digital image to generate an improved digital image, the improved digital image having a higher picture quality than the digital image;
displaying the improved digital image on a display device; and
generating the lower resolution histogram by:
assigning each pixel of the raw image data to a bin of a plurality of bins of the lower resolution histogram; and
for each bin of the lower resolution histogram:
calculating a representative pixel intensity value of pixel intensity values assigned to that bin; and
assigning the representative pixel intensity value to each pixel in that bin.