Method and device for generating upsampling filter

Abstract

Provided is a method for generating an up-sampling filter, which can improve the effect of image processing. The method comprises: acquiring an original enhancement layer sample image and a down-sampling filter; generating a base layer sample image according to the original enhancement layer sample image and the down-sampling filter; and generating an up-sampling filter according to the base layer sample image and the original enhancement layer sample image, so that the up-sampling filter satisfies that: the similarity between sample prediction information which is generated according to the up-sampling processing performed on the base layer sample image by the up-sampling filter and original information which is determined according to the original enhancement layer sample image satisfies preset conditions. The similarity of a prediction image which is generated according to a base layer image and a determined up-sampling filter to an original image of an enhancement layer image can be effectively improved, which reduces the impact on image processing when the pixels of the base layer image have, for example, a sudden change, and improves the effect of image processing.

Description

technical field [0001] The present invention relates to the field of video processing, and more particularly, to a method and device for generating an upsampling filter, and a method and device for image processing using the upsampling filter, an encoder and a decoder. Background technique [0002] With the rapid development of the Internet and the increasingly rich material and spiritual culture of people, there are more and more requirements for video applications on the Internet, especially for high-definition video applications, and the data volume of high-definition videos is very large. For transmission in the Internet with limited bandwidth, the problem that must be solved first is the problem of high-definition video compression and encoding. [0003] In the network environment (such as the Internet), because the network bandwidth is limited, the needs of terminal equipment and users are different, so it is not satisfactory and effective to compress the code stream f...

AI Technical Summary

Problems solved by technology

However, since the pixels of the low-quality image are obtained by down-sampling the original image of the high-quality image, in the down-sampling process, there is a down-sampling effect due to noise, etc. The original image has distortions such as mutations, and when the low-quality image is directly restored to high-quality pixels by copying, it will affect the encoding of high-quality images

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