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Image resizing device and parameter adjusting method thereof

A technology for image scaling and parameter adjustment, applied in image data processing, graphics and image conversion, digital output to display devices, etc., can solve problems such as inability to change, unsatisfactory output quality of image signals, etc., and achieve the effect of good output quality

Inactive Publication Date: 2008-11-19
MEDIATEK INC
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Problems solved by technology

[0003] The practice in the prior art is to preset the parameters of the image scaling device to a fixed value, and the parameters cannot be changed before the image signal is rescaled. In this way, some parts of the image signal may be unsatisfactory. output quality

Method used

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  • Image resizing device and parameter adjusting method thereof
  • Image resizing device and parameter adjusting method thereof
  • Image resizing device and parameter adjusting method thereof

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Embodiment Construction

[0014] Certain terms are used in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. The "comprising" mentioned in the specification and claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect electrical connection means. Therefore, if it is described in the text that the first device is coupled to the second device, it means that the above-mentioned first device may be directly electrically connected to the above-mentioned second device, or indirectly electrically connected to the above-mentioned second device through other devices or connection means.

[001...

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Abstract

The invention provides a parameter adjusting method of an image resizing module. The parameter adjusting method includes receiving an image signal; and referencing a signal characteristic of the image signal to adjust a parameter with which the image resizing module resizes the image signal. The signal characteristic is corresponding to the frequency characteristic or the edge characteristic of the video signal; the image resizing module implements the vertical inserting operation, horizontal inserting operation or both on the video signal by using the parameters. The dynamically-adjusting parameter of the invention can make a better quality for the outputting image.

Description

technical field [0001] The invention relates to an image scaling device, in particular to an image scaling device and its parameter adjustment method. Background technique [0002] In the image processing process, when the image signal is not suitable for the specifications of the output device (such as a TV screen or a computer monitor), an image scaling device is usually used to scale or re-adjust the size of the above-mentioned image signal. The prior art image scaling device The image signal is scaled by using an interpolation algorithm, such as linear interpolation, bilinear interpolation, cubic interpolation or other interpolation algorithms. When the image scaling device uses an interpolation algorithm to process the image signal, one or more parameters can actually be set or changed. In many examples, the selection of parameters is very important to the output quality of the image signal after scaling. [0003] The practice in the prior art is to preset the paramete...

Claims

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Application Information

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IPC IPC(8): G09G5/36G09G5/373G06T3/40
CPCG06F3/14G09G5/00G09G2340/0414G09G2340/0421G09G2360/18
Inventor 施养宏柏堂宏
Owner MEDIATEK INC
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