Image decoding method and apparatus
A technology for image decoding and image acquisition, which is applied in image communication, digital video signal modification, electrical components, etc. It can solve problems such as difficult to recognize characters, cannot clearly recognize characters, reduce image clarity, etc., and achieve the effect of reducing system resources
Active Publication Date: 2016-02-17
ALIBABA (CHINA) CO LTD
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[0004] However, decoding by downsampling will reduce the clarity of the image. For some text-based images, such as Weibo, graphic novels, comics, etc., if the image is displayed in a reduced image size, it may not be clear The specific content of the text; if the image is displayed by zooming in on the size of the reduced image, the text in the image will appear as a blurred gray area due to the reduced clarity, and the specific content of the text cannot be clearly recognized
Therefore, by downsampling, the text in the image is difficult to recognize, making it impossible for the user to browse the web normally, and reducing the user experience
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[0023] Typically, downsampling an image means reducing the number of pixels in the image and, therefore, reducing the sharpness of the image. For some color images, such as landscapes, portraits, etc., even if the image resolution is reduced, it will not affect the user's recognition of the image; however, for images mainly composed of text, downsampling will make it difficult to recognize the text in the image. The image mainly based on text is generally a grayscale image. The technical solution provided by the present invention recognizes the grayscale image from the down-sampled image, and then re-decodes the recognized grayscale image according to the original size, so that the image The text in can be clearly recognized.
[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are...
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The invention discloses an image decoding method. The method comprises: coding data of an image are obtained; according to a first decoding rule, the coding data are decoded to obtain pixel data of the image; a gray scale pixel in the image is identified based on the pixel data; and when the total number value of the identified gray scale pixels is larger than or equal to a preset threshold value, the coding data are decoded again according to a second decoding rule. In addition, the invention also provides an image decoding apparatus. According to the method and apparatus, compared with the prior art, after sampling decoding is reduced for an image at a webpage, an image focusing on characters is identified and the identified image is decoded again, thereby reducing the system resources occupied by the image and guaranteeing clear display of the characters in the image.
Description
technical field [0001] The present invention relates to the technical field of mobile communication, and more specifically, to an image decoding method and device. Background technique [0002] When browsing the webpage on the terminal device, firstly, the terminal device obtains the resource data of the webpage from the server, and saves the acquired resource data, then parses the resource data to form webpage information, and finally, the terminal device displays the webpage information through the browser. Wherein, in the process of parsing resource data to form webpage information, the webpage information needs to occupy part of system resources. If the web page information occupies too many system resources, it may cause insufficient system resources, causing some programs of the terminal device to stop running or crash, affecting the normal operation of the terminal device. [0003] Generally, images occupy more system resources in web page resource data. In order to ...
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Login to View More IPC IPC(8): H04N19/44H04N1/41H04N19/186
CPCH04N19/44
Inventor 喻世江
Owner ALIBABA (CHINA) CO LTD