A method and device for color synthesis in high dynamic range image synthesis

Abstract

The invention discloses a method and device for color synthesis in high dynamic range image synthesis. The method includes: respectively determining the first and second color values ​​according to the value distribution of the brightness values ​​of pixels in the target LE image and the target HE image. A color difference adjustment function; adjust the color difference values ​​of the target LE image and the target HE image respectively according to the first and second color difference adjustment functions, and use the adjusted color difference value to synthesize the intermediate color difference value of the middle high dynamic range image; obtain the target The composite brightness value of the high dynamic range image; according to the brightness value of the pixel point in the target LE image and the target HE image, the composite brightness value of the target high dynamic range image, and the first and second color difference adjustment functions, determine the saturation adjustment factor; adopt The saturation adjustment factor adjusts the intermediate color difference values ​​of the intermediate high dynamic range image to generate the composite color difference value of the target high dynamic range image. With this color synthesis method, no color distortion will occur.

Description

technical field [0001] The invention relates to the technical field of image synthesis, in particular to a method and device for color synthesis in high dynamic range image synthesis. Background technique [0002] For the photosensitive element, the dynamic range refers to the range from "darkest" to "brightest" contained in the image generated by the photosensitive element after exposure. The larger the dynamic range, the richer the image can express. The included color space Also wider. For actual scenes, the dynamic range indicates the range from "darkest" to "brightest" contained in the scene. The larger the dynamic range, the richer the layers of pictures in the scene and the wider the color space contained. [0003] If the dynamic range of the photosensitive element is larger than the dynamic range of the actual scene to be photographed, in the image generated after shooting the actual scene with the photosensitive element, the level of the scene is more prominent and...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the embodiments of the present invention is to provide a method and device for color synthesis in high dynamic range image synthesis, so as to solve the problem that the color synthesis in the existing method for high dynamic range image synthesis is easy to deviate and appear The problem of color distortion

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