Image exposure control methods, apparatus, devices and storage media

By performing multi-resolution hierarchical segmentation and brightness value pair fitting on the image, the exposure control problem when mapping high dynamic range images to low dynamic range images is solved, realizing refined automatic exposure control and improving the accuracy and stability of the exposure effect.

CN121357427BActive Publication Date: 2026-05-26HANGZHOU QUNHE INFORMATION TECHNOLOGIES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HANGZHOU QUNHE INFORMATION TECHNOLOGIES CO LTD
Filing Date
2025-12-16
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing technologies suffer from poor global exposure control adaptability and prone to defects in local exposure control when mapping high dynamic range images to low dynamic range images, making it difficult to achieve efficient and accurate exposure effects.

Method used

By performing multi-resolution hierarchical segmentation on the image, constructing pairs of brightness values, and fitting the target exposure function, refined automatic exposure control is achieved. The target exposure function is obtained by averaging or weighting the exposure parameters of each resolution level.

Benefits of technology

It significantly improves the accuracy and stability of exposure control, avoids visual defects in traditional methods, and ensures the overall effect of image exposure processing and the coordination of local details.

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Abstract

This disclosure provides an image exposure control method, apparatus, device, and storage medium. The method includes: segmenting a first image based on the i-th resolution level out of N resolution levels to obtain M... i Image blocks; N and M i All are integers greater than 1; for the i-th resolution level, M i Each image block in the image block is sampled to obtain multiple first pixels in each image block; based on the original brightness value and target brightness value of each first pixel in each image block, a brightness value pair is constructed; wherein, the target brightness value is the brightness value obtained after applying a preset correction rule to the first pixel; based on the brightness value pair corresponding to each image block, a target exposure function is fitted; wherein, the target exposure function can characterize the mapping relationship between the original brightness value and the target brightness value of the first pixel.
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Citation Information

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