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Image processing device and method

An image processing device and pixel technology, applied in image data processing, image communication, image enhancement, etc., can solve problems such as ugly displayed images, large amount of computation, complex circuit structure, etc.

Inactive Publication Date: 2001-06-27
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are problems such as the complex structure of the circuit for thinning text, and changing the thinning method according to the discrimination between natural images and text parts, etc., resulting in a large amount of computation during thinning.
[0010] In addition, in the conventional average value reduction method shown in FIG. 6, there is a problem that a stepped portion occurs where continuous lines such as characters or graphic images continue, and the displayed image is ugly.

Method used

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  • Image processing device and method

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Embodiment approach

[0036] FIG. 1 is a block diagram of an image processing apparatus according to the present invention. Its structure is the same in the case of thinning out in the horizontal direction and thinning out in the vertical direction, but the delay time of the delay circuit is different. In Fig. 1, 11, 12, and 13 are delay circuits, which are composed of a bistable multivibrator, etc., and delay each pixel when the input image data is thinned in the horizontal direction. In the case of thinning, a delay is performed for each row, and the delayed signal is passed to the next circuit. The image data Sd is input to the delay circuit 11 and delayed in the delay circuit 11 , and the signal Sc is input to the delay circuit 12 . Delayed by the delay circuit 12, the signal Sb is input to the delay circuit 13, and the delayed signal Sa is output from the delay circuit 13.

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Abstract

An image processing device characterized in that the device comprises a coefficient determining means for detecting the correlation between a pixel to be removed in thinning pixel blocks generated by using delay means in horizontal and vertical directions and an adjacent pixel and for determining a coefficient corresponding to the correlation and a calculating means for calculation from the pixel to be removed and the adjacent pixel, pixel data is generated by using a predetermined calculating equation of the calculation means, and thinning and reduction of each pixel block in horizontal and vertical directions are carried out.

Description

technical field [0001] The invention relates to an image processing device and a processing method. In particular, thinning means in image resolution conversion is characteristic. Background technique [0002] In recent years, centering on multimedia equipment, digital image video equipment such as digital still camera and DVD has spread rapidly. In addition, display devices such as dot-matrix devices such as liquid crystal display devices and plasma display devices have spread widely. Here, when the number of pixels of the image data is different from the number of pixels of the display device, it is necessary to perform processing to match the number of pixels of the image data to the number of pixels of the display device, that is, perform resolution conversion of the image data. [0003] In an apparatus for displaying a video signal on an existing display device having an inherent number of pixels, when displaying an image by thinning out the pixels, the method shown i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40G06T5/30H04N1/393
CPCH04N1/3935G06T3/4023G06T5/30H04N1/387
Inventor 山内利之立川浩司山崎耕一
Owner PANASONIC CORP