A method and device for improving the resolution of human face images

Abstract

The invention discloses a method and device for improving the resolution of a human face image, extracting a first original human face image from an image; performing resolution amplification processing on the first original human face image to obtain a first target human face Image; the face feature point extraction process is carried out to the first target face image, and the first face feature point is obtained; the first face feature point is interpolated to obtain the first face prior information; The first face prior information and the first target face image are fused to obtain a second target face image with a higher resolution. Of course, in order to obtain a higher-resolution image, it is also possible to continue to extract face prior information from the obtained second target face image, so as to obtain a higher-resolution face image. This scheme fully considers the prior information of the face, and the obtained reconstructed face image has more details and can obtain better reconstruction effect.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method and device for improving the resolution of a human face image. Background technique [0002] Image super-resolution reconstruction technology refers to digital image processing technology that generates high-resolution, high-quality images from one or more low-resolution, low-quality images. The resolution of the digital image here refers to the spatial resolution of the image, that is, the number of pixels per inch of the image, and the unit of resolution is dpi (dots per inch). It is not difficult to understand that the greater the resolution, the greater the amount of image information and the clearer the image. Obtaining higher-resolution images from low-resolution images is a process of "creating out of nothing", that is, to estimate more information from the existing information. [0003] As a method that can significantly improve image quality without improving h...

AI Technical Summary

Problems solved by technology

[0008] The embodiment of the present invention provides a method and device for improving the resolution of human face images, which is used to solve the problem that prior information of human faces is not considered when processing human face images in the prior art, and for very extreme low-resolution human faces The image processing effect is poor and cannot meet the technical problems of the actual needs of users

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