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Device and method for image scaling

An image zooming and image technology, applied in image communication, image data processing, graphics and image conversion, etc., can solve the problem of increasing ROM circuit size and achieve the effect of reducing hardware resources

Active Publication Date: 2016-08-17
SYNAPTICS JAPAN GK
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Problems solved by technology

When a ROM (Read Only Memory) is used to store necessary interpolation coefficients, the circuit size of the ROM, for example, increases undesirably

Method used

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  • Device and method for image scaling

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Embodiment Construction

[0047] The invention will now be described herein with reference to illustrative embodiments. Those skilled in the art will recognize that many alternative embodiments can be accomplished using the teachings of the present invention and that the invention is not limited to the embodiments illustrated for explanatory purposes. It will be appreciated that, for simplicity and clarity of illustration, elements in the figures have not necessarily been drawn to scale. For example, the dimensions of some elements are exaggerated relative to other elements.

[0048] In order to better understand the present invention, a general description of bilinear image scaling is first given.

[0049] figure 1 is a conceptual diagram illustrating an example of bilinear image scaling. figure 1 Illustrated in is an image enlargement with a magnification factor of 4 / 3, that is, image scaling in which image data of 4×4 pixels Q of an output image is generated from image data of 3×3 pixels P of an ...

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Abstract

The invention relates to a device and method for image scaling. An image processing circuit includes a scaling processing section having interpolation coefficient inputs, an interpolation coefficient rearrangement section and an interpolation coefficient feeding section. The interpolation coefficient feeding section feeds first interpolation coefficients to the interpolation coefficient rearrangement section. The interpolation coefficient rearrangement section is configured to feed interpolation coefficients selected from the first interpolation coefficients and second interpolation coefficients obtained by subtracting the first interpolation coefficients from a predetermined value, respectively, to the respective interpolation coefficient inputs of the scaling processing section in response to coordinates of a target pixel of the output image. The scaling processing section is configured to generate pixel data of the target pixel of the output image by performing interpolation on the pixel data of pixels of the input image, using the interpolation coefficients fed to the interpolation coefficient inputs from the interpolation coefficient rearrangement section.

Description

technical field [0001] The present invention relates to an image processing circuit, a display panel driver, a display device and an image processing method, and more particularly to a device and method for image scaling preferably used in the image processing circuit, display panel driver and display device. Background technique [0002] A display panel driver that drives a display panel such as a liquid crystal display panel generally has a function of performing image scaling to enlarge an image. Such a function may be used to generate pixel data matching the resolution of the display panel from input image data fed from outside to the display panel driver when the input image data does not match the resolution of the display panel. [0003] Bilinear methods are a known method for image scaling. In the bilinear method, pixel data of an output image (enlarged or reduced image) is calculated by linear interpolation of pixel data of an input image. Image scaling by bilinea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/393G06T3/40
CPCG06T3/4007H04N1/3935
Inventor 织尾正雄降旗弘史能势崇
Owner SYNAPTICS JAPAN GK
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