Method and device for color combination in high-dynamic-range image combination

Abstract

The invention discloses a method and a device for color combination in high-dynamic-range image combination. The method comprises the steps of respectively determining a first color difference adjusting function and a second color difference adjusting function according to brightness value distribution of pixels in an objective LE image and an objective HE image; adjusting the color difference values of the objective LE image and the objective HE image according to the first color difference adjusting function and the second color difference adjusting function, combining the intermediate color difference value of an intermediate high-dynamic-range image according to the adjusted color difference value; obtaining the combined brightness value of an objective high-dynamic-range image; determining a saturation adjusting factor according to the brightness values of the pixels in the objective LE image and the objective HE image, the combined brightness value of the objective high-dynamic-range image, the first color difference adjusting function and the second color difference adjusting function; and adjusting the intermediate color difference value of the intermediate high-dynamic-range image by means of the saturation adjusting factor, thereby generating the combined color difference value of the objective high-dynamic-range image. The method for color combination can prevent color distortion.

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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