Invention Grant
- Patent Title: Intensity separated local white balance correction
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Application No.: US18194762Application Date: 2023-04-03
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Publication No.: US12143733B2Publication Date: 2024-11-12
- Inventor: Gang Hua , Shashank Dabral , Mihir Narendra Mody , Rajasekhar Reddy Allu , Niraj Nandan
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Xianghui Huang; Frank D. Cimino
- Main IPC: H04N23/88
- IPC: H04N23/88 ; H04N9/78 ; H04N23/71 ; H04N23/741 ; H04N23/76

Abstract:
Local automatic white balance (AWB) of wide dynamic range (WDR) images is provided. Methods and systems include collecting, by an image signal processor (ISP), statistics for local AWB from at least one wide dynamic range (WDR) image received by the ISP; generating, by a processor, based on the statistics, local gain lookup tables (LUTs), one for each color channel represented in the WDR image(s), each local gain LUT providing a correlation between gain and intensity; and storing the local gain LUTs. Further processing includes, for each of multiple pixels of a WDR image to be output calculating an intensity value, accessing the local gain LUT for the color channel corresponding to that pixel using the calculated intensity value to identify a corresponding local gain value, and applying the local gain value to that pixel.
Public/Granted literature
- US20230239585A1 Intensity Separated Local White Balance Correction Public/Granted day:2023-07-27
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