Decoding method, device and system of PNG image

Abstract

The embodiment of the invention discloses a decoding method of a PNG image. The decoding method comprises the steps of parsing the file format of the PNG image by utilizing a C language by a hot end CPU so as to obtain original data of the PNG image; then writing the original data into an FPGA board card in a write-caching format by calling an OpenCL language; after the FPGA board card receives a decoding instruction of the host end, decoding the original data based on a preset decoding algorithm by adopting an OpenCL language, and decompressing the decoded data; and finally, reading the decompressed data in a read-caching mode from the FPGA board card by calling the OpenCL language by the host end CPU so as to obtain the decoded PNG image. The decoding method of the PNG image improves the image decoding rate and the throughput performance, and is good for increasing the development efficiency. In addition, the embodiment of the invention also provides a corresponding realizing device and system. The device and the system have the corresponding advantages.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of image processing, and in particular, relate to a method, device and system for decoding PNG images. Background technique [0002] With the rapid development of image processing technology and computer technology, PNG (Portable Network Graphic Format, streaming network graphics format) image was born as a new image file storage format for bitmap, adding some features that GIF file format does not have. feature whose purpose is to attempt to replace images in the GIF and TIFF file formats. With the development of image acquisition equipment such as mobile phones, tablets, and digital cameras, users increase the size of image pixels, resulting in an exponential increase in the size of image data on the Internet. It has been widely used and popularized, and more and more applications adopt PNG image format as image material. [0003] At present, when decoding PNG images in the data cen...

AI Technical Summary

Problems solved by technology

[0003] At present, when decoding PNG images in the data center, it is generally implemented by calling the PNG decoding library, that is, using the LIBPNG library to decode the PNG image file to obtain RGBA format pixel data for further image pixel data encoding, and the PNG decoding library It is implemented in C language and executed serially on a general-purpose processor, which leads to limited performance of image file decoding. Especially in recent years, with the continuous increase of image resolution, users have higher and higher requirements for image decoding performance. Existing The PNG image decoding method in the technology has been unable to meet the needs of users

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