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Image scaling method and apparatus thereof

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

Active Publication Date: 2015-02-11
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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  • Image scaling method and apparatus thereof
  • Image scaling method and apparatus thereof
  • Image scaling method and apparatus thereof

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] In the embodiment of the present invention, when scaling an input original image into a target image, the data line information required in the scaling process is first 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 and scaling on the original image according to the data line information in the input buffer. Since only the data line information required in the sc...

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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, in particular to an image zooming method and device. Background technique [0002] When displaying the original image in the external memory through the display screen, there is usually a difference between the size of the display area of ​​the display screen and the size of the original image, so generally the original image needs to be scaled before being displayed. When scaling the original image, in order to ensure the real-time performance of the display, it is generally necessary to read all or part of the original image data from the external memory to the input buffer, and then perform interpolation on the original image data in the input buffer , to get the target image data. When it is necessary to read more lines of original image data from the external memory for image scaling processing, not only the amount of data transmission is increased, the occupation of DMA bandwidth is increas...

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Application Information

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Patent Type & Authority Patents(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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