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Image coding method, image decoding method, terminal equipment and readable storage medium

An image coding and coding technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of slow image rendering, high processing power consumption of terminal equipment, and slow image transmission speed.

Pending Publication Date: 2022-07-26
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present application provide an image encoding method, an image decoding method, a terminal device, and a computer-readable storage medium, which can solve the problems of slow image transmission speed, high computational complexity, high processing power consumption of terminal devices caused by high-resolution images and Image rendering issues are slow

Method used

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  • Image coding method, image decoding method, terminal equipment and readable storage medium
  • Image coding method, image decoding method, terminal equipment and readable storage medium
  • Image coding method, image decoding method, terminal equipment and readable storage medium

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Embodiment 1

[0167] The image encoding method provided in this embodiment is extended on the basis of the JPEG progressive mode, so as to realize variable resolution image encoding compatible with the JPEG progressive mode. Therefore, when the image encoded by the image encoding method is decoded and displayed, the terminal device can decode to obtain a specific low-resolution image, or can decode to obtain an original high-resolution image to meet the display requirements of different scenarios. The following describes the image encoding and image decoding based on the JPEG progressive mode in detail.

[0168] 1. Image coding based on JPEG progressive mode

[0169] The encoding process of JPEG progressive mode mainly includes: (1) Divide the original image into multiple 8*8 pixel blocks, each pixel block has 64 pixels; (2) Perform discrete cosine transform on each pixel block (discrete cosine transform). , DCT) to obtain 64 DCT coefficients corresponding to the pixel block; 3. Quantize t...

Embodiment 2

[0225] The image coding method provided by this embodiment is extended on the basis of the PNG interlaced scanning mode, so as to realize the variable-resolution image coding compatible with the PNG interlaced scanning mode. Therefore, when the image encoded by the image encoding method is decoded and displayed, the terminal device can decode to obtain a specific low-resolution image, or can decode to obtain an original high-resolution image to meet the display requirements of different scenarios. The following describes the image encoding and image decoding based on the PNG interlaced scanning mode in detail.

[0226] 1. Image encoding based on PNG interlaced scanning mode

[0227] Among them, the PNG interlaced scanning mode can use the 7-pass interlaced scanning (Adam7) algorithm to perform multiple rounds of scanning on the image in the spatial domain, and each round of scanning only scans part of the pixels of the image. That is, the PNG interlaced scanning mode graduall...

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Abstract

The invention is suitable for the technical field of terminals, and particularly relates to an image coding method, an image decoding method, terminal equipment and a readable storage medium. According to the method and the device, when the high-resolution image is displayed on the low-resolution terminal equipment, only part of image data and differential data need to be transmitted or acquired, so that the transmission duration of the image data is effectively shortened, the image transmission speed is improved, or the acquisition duration of the image data is effectively shortened, and the image acquisition speed is improved. Moreover, the terminal equipment only needs to decode part of the image data and the differential data to obtain the target image meeting the display requirement of the terminal equipment, so that the operation complexity of the terminal equipment during image processing is effectively reduced, the processing power consumption of the terminal equipment is reduced, the image processing efficiency is improved, the image presentation speed is improved, and the user experience is improved. And user experience is improved.

Description

technical field [0001] The present application belongs to the technical field of terminals, and in particular, relates to an image encoding method, an image decoding method, a terminal device, and a computer-readable storage medium. Background technique [0002] With the development of image acquisition equipment, the image resolution is getting higher and higher. However, the screen resolution of the display screen in the existing terminal device is far lower than the image resolution, that is, limited by the display capability of the terminal device, the terminal device usually cannot perform image presentation according to the image resolution. However, high-resolution images will increase the duration of image transmission, resulting in slow image transmission speed, and will increase the computational complexity of image processing such as image decoding and display, resulting in high processing power consumption of terminal devices, slow image rendering, and impact on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/59H04N19/61H04N19/625H04N19/182H04N19/122
CPCH04N19/59H04N19/122H04N19/182H04N19/625H04N19/61
Inventor 周建东
Owner HUAWEI TECH CO LTD
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