Method and device used for enhancing image sequences

Abstract

The invention discloses a method and device used for enhancing image sequences. The method comprises the following steps of: determining the attribute value of each unit in each image in a plurality of associated images, wherein each unit comprises at least a pixel; determining the mapping function corresponding to each unit in each image according to the corresponding relation between the predetermined attribute value and the mapping function, wherein the corresponding relation between the attribute value and the mapping function is obtained according to at least one frame of image in a plurality of associated images; determining the mapped image of each image according to the mapping functions of all the units in the image. According to the method, the mapping functions of a part of images in the associated images are computed and the mapped images of other images are determined according to the corresponding relations between the predetermined attribute values and the mapping functions, and therefore the frequency of traversing other images can be reduced, the computed amount of the image enhancing method can be reduced and the image sequences can be quickly and effectively enhanced; the method has a wide range of application.

Description

Technical field [0001] The present invention relates to the field of image processing, and in particular, to a method and device for image sequence enhancement. Background technique [0002] In the image acquisition system, it is inevitable that some image details will become weak (such as: underexposure, bad weather conditions, etc.). [Document 1] proposes an image enhancement algorithm that performs histogram equalization processing on the image. This method changes the attribute histogram of the original image from a certain attribute interval in a relatively concentrated to a uniform distribution in the entire attribute range. Histogram equalization is to stretch the image non-linearly and redistribute image pixel values ​​so that the number of pixels within a certain attribute range is roughly the same. Histogram equalization is to change the histogram distribution of a given image into a "uniform" distribution histogram distribution. [Document 1] The proposed image enhanc...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the calculation amount of the method for equalizing the image sequence in the related art is too large, which limits the application range of the algorithm, the present invention proposes a method and device for image sequence enhancement, which can reduce the number of images traversed, Save the amount of calculation of the image enhancement method, quickly and effectively enhance the image sequence, and have a wide range of applications

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