US 12,293,486 B2
Image processing method, image processing system, and non-transitory computer readable storage medium for processing image with one or more brightness ranges
Kung Ho Lee, Hsinchu (TW); Yu Cheng Cheng, Hsinchu (TW); and Jia Wei Wu, Hsinchu (TW)
Assigned to Realtek Semiconductor Corporation, Hsinchu (TW)
Filed by Realtek Semiconductor Corporation, Hsinchu (TW)
Filed on May 18, 2022, as Appl. No. 17/663,829.
Claims priority of application No. 110146447 (TW), filed on Dec. 10, 2021.
Prior Publication US 2023/0186442 A1, Jun. 15, 2023
Int. Cl. G06T 5/40 (2006.01); G06T 1/20 (2006.01); G06T 7/13 (2017.01); G06T 7/50 (2017.01); G06T 11/00 (2006.01)
CPC G06T 5/40 (2013.01) [G06T 1/20 (2013.01); G06T 7/13 (2017.01); G06T 7/50 (2017.01); G06T 11/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An image processing method, comprising:
generating, by a processor, a sliding window for a target pixel in a plurality of pixels in image data;
generating, by the processor, an original brightness histogram of the sliding window according to an original bit depth;
generating, by the processor, a low-bit-depth brightness histogram of the sliding window according to a low bit depth;
determining, by the processor, a target low-bit-depth range from the low-bit-depth brightness histogram according to the target pixel;
extracting, by the processor, a partial original brightness histogram from the original brightness histogram according to the target low-bit-depth range; and
performing, by the processor, a histogram equalization process on the partial original brightness histogram according to the original bit depth to generate a final brightness value of the target pixel.