Image resolution converting method, image processing device and image display device

An image processing device and technology of image resolution, which are applied in image data processing, graphic image conversion, instruments, etc., can solve the problems of complex operation, blurred image, and poor image quality, and achieve the effect of suppressing the amount of calculation.

Inactive Publication Date: 2009-10-21
RICOH KK
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The closest interpolation method can be performed at high speed, but uneven edges (jagginess) such as steps are generated on the image, and there is a problem that the image quality deteriorates.
The linear interpolation method is more effective than the closest interpolation method and can generate a smooth image, however, it reduces image sharpness and causes image blur
The cubic convolution method can provide a higher-quality image than the closest interpolation method or linear interpolation method, but it has a large number of reference pixels and complex operations
Furthermore, the cubic convolution method will increase the noise component of the image
In the method of Patent Document 1, an image of higher quality than the closest interpolation method can be obtained with a relatively small reference range, but it is difficult to avoid uneven edges
[0004] As described above, among the known methods, there is no method capable of generating a smooth and sharp image without uneven edges.
Furthermore, among the known methods, there is no method capable of generating high-quality images while suppressing the amount of computation.

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  • Image resolution converting method, image processing device and image display device
  • Image resolution converting method, image processing device and image display device
  • Image resolution converting method, image processing device and image display device

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Embodiment Construction

[0099] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0100] figure 1 A block diagram showing an image display device 10 according to an embodiment of the present invention.

[0101]The image display device 10 may be any display device, such as a cathode ray tube (cathoderay tube, hereinafter referred to as "CRT") display, a liquid crystal display (hereinafter referred to as "LCD"), a plasma display A panel (plasma display panel, hereinafter abbreviated as "PDP"), a projector, etc., which can display an image based on the image data 1 .

[0102] Such as figure 1 As shown, the image display device 10 includes an image processing device 9 and a display unit 8 . When the image data 1 is input to the image display device 10, the image processing device 9 detects the resolution of the image data 1 (hereinafter referred to as "input resolution"), and compares the input resolution with the resolution of ...

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Abstract

The present invention relates to a resolution conversion method, an image processing device and an image display device using the resolution conversion method. Using an interpolation method, image resolution can be converted. The interpolation method generates a weighting factor according to the pixel value and the distance value of the reference pixel, and determines the pixel value of the interpolation pixel according to the weighting factor. According to the present invention, a smooth and sharp image without uneven edges can be generated.

Description

technical field [0001] The present invention relates to transforming image resolution using interpolation methods and displaying the transformed image. Background technique [0002] Existing display devices usually provide an image resolution conversion function. For example, if the resolution of the image is lower than the output resolution of the display device, any known interpolation method such as closest interpolation method, linear interpolation method, cubic convolution method, etc. can be used to increase the image resolution. In addition, various interpolation methods are disclosed in, for example, Japanese Patent No. 2796900 (hereinafter abbreviated as "Patent Document 1"). [0003] The closest interpolation method can be performed at high speed, but there is a problem that uneven edges (jagginess) such as steps are generated on an image, and image quality deteriorates. The linear interpolation method is more effective than the closest interpolation method and c...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G06T3/40
CPCG06T3/4007
Inventor浪江健史龟山健司村井俊晴
OwnerRICOH KK