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A picture format conversion method, device and system

A technology of picture format and conversion method, which is applied in the field of communication, can solve the problems of wasting network bandwidth, large picture size, and low calculation efficiency, and achieve the effects of improving conversion effect, improving calculation efficiency, and reducing complexity

Active Publication Date: 2020-09-04
SHENZHEN TENCENT COMP SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the research and practice of the existing technology, the inventor of the present invention found that in the existing solution, if Q1 is relatively large, and Q2 is much smaller than Q1, it will lead to excessive quality loss after transcoding of high-quality pictures However, if Q1 is relatively small and Q2 is much larger than Q1, the size of the image after transcoding will become larger, wasting network bandwidth, so the conversion effect is not good; moreover, since the existing quantization table determines The method of original encoding quality parameters has certain complexity. For example, if each table has 64 parameters as an example, then 100 tables have 6400 parameters. It is necessary to compare these parameters one by one to obtain the quality of the picture, so Computational efficiency is also relatively low

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  • A picture format conversion method, device and system
  • A picture format conversion method, device and system
  • A picture format conversion method, device and system

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Experimental program
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Embodiment 1

[0036] This embodiment will be described from the perspective of a picture format conversion device. Specifically, the picture format conversion device may be integrated in a device such as a terminal, or may be installed in a terminal in the form of a terminal application.

[0037] A method for image format conversion, comprising: acquiring image information that needs to be format converted, performing quality inspection on the image information, and obtaining original encoding quality parameters; decoding the image information according to the original encoding quality parameters, and obtaining original data; The original encoding quality parameter and the preset weight table calculate the corresponding weighted value; use the preset function to calculate the weighted value to obtain the target encoding quality parameter; encode the original data according to the target encoding quality parameter to obtain Target format image.

[0038] like Figure 1b As shown, the specifi...

Embodiment 2

[0087] According to the method described in the first embodiment, the following examples will be used for further detailed description.

[0088] In this embodiment, the picture format conversion device is specifically integrated in the terminal, and the picture is specifically a JPEG picture as an example for description.

[0089] like Figure 2a As shown, a picture format conversion method, the specific process can be as follows:

[0090] 201. The terminal receives a picture format conversion request triggered by a user, wherein the picture format conversion request carries picture information of a JPEG picture that needs to undergo format conversion.

[0091] 202. The terminal performs quality detection on the picture information to obtain an original encoding quality parameter.

[0092] For example, taking the brightness as an example, the brightness of the JPEG picture can be specifically determined according to the picture information, and then the brightness can be ana...

Embodiment 3

[0125] In order to better implement the above method, the embodiment of the present invention also provides a picture format conversion device, such as Figure 3a As shown, the image format conversion device may include an acquisition unit 301, a detection unit 302, a decoding unit 303, a first operation unit 304, a second operation unit 305, and an encoding unit 306, as follows:

[0126] (1) acquisition unit 301;

[0127] The obtaining unit 301 is configured to obtain picture information that needs format conversion.

[0128] For example, the obtaining unit 301 may specifically receive a picture format conversion request triggered by a user, wherein the picture format conversion request carries picture information that needs to be converted in format.

[0129] Or, for another example, the acquiring unit 301 may specifically receive a picture format conversion request triggered by a user, wherein the picture format conversion request carries a picture ID or address for which ...

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Abstract

Disclosed are a picture format conversion method, device and system. In embodiments of the present invention, the quality of picture information needing to be susceptible to format conversion is detected to obtain an original encoding quality parameter, and the picture information is decoded according to the original encoding quality parameter to obtain original data; then, a corresponding weighted value is calculated according to the original encoding quality parameter and a preset weight table, and the weighted value is calculated by utilizing a preset function to obtain a target encoding quality parameter; and then, the original data is encoded according to the target encoding quality parameter to obtain a target format picture. The solution not only can improve the conversion flexibility and conversion effect thereof, but also can improve the calculation efficiency thereof.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a picture format conversion method, device and system. Background technique [0002] Image format conversion refers to converting an image from one format to another, referred to as image transcoding. Among them, common image formats include standard image file formats (BMP, Bitmap), image formats formulated by the Joint Photographic Experts Group (JPEG, Joint Photographic Experts Group), image file storage formats (PNG, PortableNetwork Graphic Format), image interchange Format (GIF, Graphics Interchange Format), JP2 (a format of the JPEG 2000 standard), and Portable Document Format (PDF, Portable Document Format), etc. [0003] When performing picture format conversion, it is generally necessary to check the encoding quality of the picture to determine the encoding quality Q1 of the picture, and then decode the picture according to the encoding quality Q1 to obta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T9/00
CPCG06T9/007
Inventor 王文强高剑林
Owner SHENZHEN TENCENT COMP SYST CO LTD