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Method and device for image scaling

An image scaling and image technology, applied in the field of image processing, can solve the problems of DMA bandwidth and buffer space waste, large data transmission volume, etc., to achieve the effect of reducing data transmission volume, reducing output cache, and improving real-time performance

Active Publication Date: 2011-11-30
ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a method for image scaling, which aims to solve the problems of large data transmission volume, DMA bandwidth and serious waste of buffer space in existing image scaling methods

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  • Method and device for image scaling
  • Method and device for image scaling

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Embodiment Construction

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0023] In the embodiment of the present invention, when the input original image is scaled and processed into the target image, the data line information needed in the scaling process is determined according to the vertical size relationship between the original image and the target image, and then read from the external memory The determined data line information is sent to the input buffer, and then the image interpolation processing unit performs interpolation scaling on the original image according to the data line information in the input buffer. Since only the data line information neede...

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Abstract

The invention, which is suitable for the image processing field, provides an image scaling method and an apparatus thereof. The method comprises the following steps: determining interval lines of data lines which need to be read according to a vertical dimension relation between an original image and a target image; determining the data line information read from the original image according to the interval lines and reading the determined data line information from the original image; carrying out interpolation operation to the data line information and storing a interpolation operation result in output buffering. By using embodiments of the invention, data transmission quantity and image scaling processing time can be minimized to the greatest extent so that the output buffering of a display screen controller can be reduced and instantaneity of the display screen can be raised.

Description

Technical field [0001] The invention belongs to the field of image processing, and particularly relates to a method and device for image scaling. Background technique [0002] When the original image in the external memory is displayed on the display screen, the size of the display area of ​​the display screen is usually different from the size of the original image. Therefore, it is generally necessary to scale the original image before displaying. When scaling the original image, in order to ensure the real-time performance of the display, it is generally necessary to first read all or part of the original image data from the external memory to the input buffer, and then perform interpolation operations on the original image data in the input buffer , Get the target image data. When more lines of original image data need to be read from the external memory for image scaling, it not only increases the amount of data transmission, increases the occupation of DMA bandwidth, and c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/393G06T3/40G09G5/373
Inventor 王强李小明许永永胡胜发
Owner ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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