A device and method for quickly converting yuv420 into rgb format

Abstract

The invention provides a device and a method for quickly converting a YUV420 format into a RGB format. The device comprises a loading module, a separation module, an extension module, a computation module and a combining module, wherein the loading module is used for loading data of YUV420 format into a continuous memory of a graphics processing unit (GPU), the separation module is used for separating the data of YUV420 format, the extension module is used for extending the channel data of a U channel and a V channel, the computation module is used for computing the values of R, G and B channels, and the combining module is used for combining the values of the R, G and B channels into an image of RGB format. The device provided by the invention adopts the GPU to quickly convert the YUV420 format into the RGB format and achieve complete parallel computation, and is applicable to the situations of the YUV420 formats with different resolutions; with the configuration of a relatively low-performance video card, time required for converting the YUV420 format into the RGB format is only within several milliseconds, in the case that the GPU has many resources, multiple paths of YUV420 data can be quickly converted at the same time, the time for converting the YUV420 format into the RGB format is greatly reduced, and the instantaneity is improved under various applications.

Description

technical field [0001] The present invention mainly relates to the technical field of image processing, in particular to a device and method for quickly converting YUV420 into RGB format. Background technique [0002] Usually, the frame image format of some video surveillance equipment after video decoding is YUV420 format, which needs to be converted into RGB for the next step of image processing, and the time required for the general conversion method increases with the increase of image resolution. Multi-channel YUV420 format frame images are converted at the same time, because the U and V channel data are inconsistent with the Y channel data size, and parallel computing cannot be directly implemented on the graphics processor GPU, thus failing to meet real-time requirements. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a device and method for quickly converting YUV420 to RGB format, so as to realize fast Y...

AI Technical Summary

Problems solved by technology

[0002] Usually, the frame image format of some video surveillance equipment after video decoding is YUV420 format, which needs to be converted into RGB for the next step of image processing, and the time required for the general conversion method increases with the increase of image resolution. Multiple channels of YUV420 format frame images are converted at the same time, because the data size of the U and V channels is inconsistent with that of the Y channel, and parallel computing cannot be directly implemented on the graphics processor GPU, thus failing to meet real-time requirements

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