Method and apparatuf for processing an image

By synthesizing and compressing HDR images in a Luma or YUV domain, the electronic device addresses the display limitations of LDR/SDR mobile devices, enabling effective display of HDR content with improved brightness and contrast control.

KR102993505B1Active Publication Date: 2026-07-21SAMSUNG ELECTRONICS CO LTD
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Patent Information

Application Number
KR1020210052525
Authority / Receiving Office
KR · KR
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-12-31
Filing Date
2021-04-22
Publication Date
2026-07-21
Estimated Expiration
2041-04-22

AI Technical Summary

Technical Problem

Mobile devices with low dynamic range (LDR) or standard dynamic range (SDR) displays are unable to effectively display high dynamic range (HDR) images, as existing multi-frame processing technologies do not account for the limitations of these displays.

Method used

An electronic device processes HDR images by synthesizing multiple images of different exposure levels, converting them into a Luma or YUV domain, fusing them, generating a gain map, and applying pixel-unit compression to generate a displayable bit range image suitable for LDR or SDR displays.

Benefits of technology

The solution allows HDR images to be compressed and displayed on LDR or SDR devices, preserving image details and user preferences for brightness and contrast, thereby enhancing the visual experience.

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Abstract

An electronic device is disclosed comprising: a memory for storing at least one instruction; and at least one processor, wherein the at least one processor executes the at least one instruction to acquire a first image, synthesizes a plurality of images of a transformed domain having different exposure levels based on the first image, fuses the plurality of images of the transformed domain, generates a gain map based on the first image and the fused image, and acquires a second image by applying a gain to the first image based on the gain map.
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Citation Information

Patent Citations

  • High dynamic range image generation and rendering

    KR1020160150650A

  • Method and device for reconstructing HDR images

    KR1020190117691A

  • Hybrid tone mapping for consistent tone reproduction of scenes in camera systems

    US20190043177A1