Invention Grant
- Patent Title: Automatic selection of optimum algorithms for high dynamic range image processing based on scene classification
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Application No.: US14105652Application Date: 2013-12-13
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Publication No.: US09852499B2Publication Date: 2017-12-26
- Inventor: Wei Ming , Xiaonong Zhan
- Applicant: KONICA MINOLTA LABORATORY U.S.A., INC.
- Applicant Address: US CA San Mateo
- Assignee: KONICA MINOLTA LABORATORY U.S.A., INC.
- Current Assignee: KONICA MINOLTA LABORATORY U.S.A., INC.
- Current Assignee Address: US CA San Mateo
- Agency: Chen Yoshimura LLP
- Main IPC: G06K9/36
- IPC: G06K9/36 ; G06T5/50 ; G06T5/00 ; G06K9/00

Abstract:
A method for processing high dynamic range (HDR) images by selecting preferred tone mapping operators and gamut mapping algorithms based on scene classification. Scenes are classified into indoor scenes, outdoor scenes, and scenes with people, and tone mapping operators and gamut mapping algorithms are selected on that basis. Prior to scene classification, the multiple images taken at various exposure values are fused into a low dynamic range (LDR) image using an exposure fusing algorithm, and scene classification is performed using the fused LDR image. Then, the HDR image generated from the multiple images are tone mapped into a LDR image using the selected tone mapping operator and then gamut mapped to the color space of the output device such as printer.
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