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Image processing device and method thereof

An image processing device and image processing technology, applied in color signal processing circuits, luminance and chrominance signal processing circuits, etc., can solve problems affecting user perception, rough and uneven display of gradient areas, and avoid false contours , Improve the effect of display quality

Inactive Publication Date: 2015-09-30
NOVATEK MICROELECTRONICS CORP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the bit depth of the image signal input to the display (for example, 6 bits) is less than the rated bit depth of the display (for example, 10 bits), since there is a gap of 4 bits between the effective bits of the input image signal and the rated bit depth of the display If there is a mismatch, it is often found that the phenomenon of so-called "false contour" (false contour) appears in the gradient area of ​​​​the image screen (such as the edge of the image), so that the display of the gradient area of ​​​​the image screen is relatively rough and uneven (smooth), thus greatly affecting the user's perception of the displayed image

Method used

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  • Image processing device and method thereof
  • Image processing device and method thereof
  • Image processing device and method thereof

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Embodiment Construction

[0090] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In addition, wherever possible, elements / components / symbols with the same reference numerals are used in the drawings and embodiments to represent the same or similar parts.

[0091] figure 1 is a schematic block diagram of an image processing device according to an embodiment of the present invention. Please refer to figure 1 , the image processing apparatus 100 in this embodiment includes a valid bit detector 110 and a compensator 120, but it is not limited thereto. The valid bit detector 110 is used to detect the number of valid bits (valid bits) in the bit depth of the image input signal Y_in, so as to output the correction coefficient Q_final correspondingly. The compensator 120 is coupled to the valid bit detector 110 to receive the correction coefficient Q_final, and performs bit number compensation on the ...

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Abstract

The invention provides an image processing device and a method thereof. The device comprises an effective bit detector and a compensator. The effective bit detector is used for detecting effective number of bits in bit depth of image input signals so that a correction coefficient can be correspondingly outputted. The compensator is coupled with the effective bit detector to receive the correction coefficient and perform bit number compensation on the image input signals according to the correction coefficient so that corresponding image output signals can be outputted.

Description

technical field [0001] The present invention relates to an image processing device, and in particular to an image processing device and a method thereof. Background technique [0002] With the rapid development of technology, high-definition displays are becoming more and more popular, enabling viewers to watch more image details, such as High Definition Multimedia Interface (HDMI) displays, which can display A picture with a resolution of 1920×1080, or even a monitor with a resolution of 4K (4K resolution), which is popular today, can have a resolution of 3840×2160 and 4096×2160 pixels. However, various image input / playback devices nowadays, such as Digital Versatile Disc (DVD for short) players, personal computers (PC), set-top boxes (STB for short), etc., can provide Most of the image quality of the display is 720×480 or 1920×1080, which is different from the display resolution provided by the above-mentioned monitors. On the other hand, the bit depth (bit depth, such a...

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Application Information

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IPC IPC(8): H04N9/64H04N9/68H04N9/77
Inventor 蔡婉清
Owner NOVATEK MICROELECTRONICS CORP