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Ripple-removing device and method

A technology for removing ripples and pixel groups. It is used in TVs, color TV components, and TV system components. It can solve the problems of discounted screen display, over-brightness, and abrupt and thin edges, so as to improve the overall display. effect of effect

Inactive Publication Date: 2012-05-16
MSTAR SOFTWARE R&D (SHENZHEN) LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ripples will cause abrupt thin edges in the picture, which may be too bright (such as peak 13) or too dark (such as trough 12) compared with adjacent images, which will greatly reduce the display effect of the picture

Method used

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  • Ripple-removing device and method
  • Ripple-removing device and method

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Embodiment Construction

[0023] figure 2 It is a block diagram of a ripple removing device 20 according to a preferred embodiment of the present invention, including a sharpness enhancement circuit 21 , a ripple removing intensity controller 22 and a mixing unit 23 . The sharpness enhancement circuit 21 receives an input video signal, which can be represented as an input pixel sequence with a plurality of pixels, and the input pixel sequence can include horizontal lines, vertical lines or oblique lines appearing in the image. The sharpness enhancement circuit 21 uses a circuit such as a filter to amplify the difference between each pixel in the input pixel sequence and its adjacent pixels to enhance the sharpness, and outputs an enhanced video signal, that is, the enhanced video signal includes enhanced sharpness The input pixel sequence after degree is called enhanced pixel sequence.

[0024] The de-ripple strength controller 22 includes a buffer 221 , a look-up table 222 and a de-ripple strength d...

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Abstract

The invention discloses ripple-removing device and method which can determine proper ripple-removing strength to enhance the integral display effect of a picture according to the complexity of an image. The ripple-removing device comprises a buffer, an inquiring meter and a ripple-removing strength determining unit, wherein the buffer is used for temporarily storing an input pixel sequence; the inquiring meter is used for storing a plurality of strength factors; the ripple-removing strength determining unit is coupled with the buffer and the inquiring meter and used for respectively detectingthe pixel value complexities of a first pixel group and a second pixel group which are related to target pixels in the input pixel sequence and inquires the inquiring meter according to the pixel value complexities of the first pixel group and the second pixel group so that the ripple-removing strength factor corresponding to an output target pixel is output.

Description

technical field [0001] The invention relates to image processing, in particular to a de-ringing device and method. Background technique [0002] Such as Figure 1A Display, in a conventional display device, in order to make the picture look clearer and sharper, the input video signal received by the display device is often processed by the sharpness enhancement circuit 11 to output an output video signal with enhanced sharpness. However, since the sharpness enhancement circuit 11 mostly uses filters to amplify the difference between adjacent pixels to achieve the effect of enhancing the sharpness, it is easy to cause image ripple effect (ringing effect). Figure 1B It is a waveform graph formed by displaying multiple pixel values ​​in the input video signal. Figure 1C Then it shows the waveform diagram of the output video signal after being processed by the sharpness enhancement circuit 11, wherein it can be found that when the waveform changes from flat to rising and from...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/21H04N7/26
Inventor 李维国赖世昌陈伯铭
Owner MSTAR SOFTWARE R&D (SHENZHEN) LTD