Image processing device and method

An image processing device and image processing technology, applied in image communication, TV, color TV components, etc., can solve problems such as noise interference, distortion, dynamic image noise interference, etc.

Active Publication Date: 2010-08-18
REALTEK SEMICON CORP
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Problems solved by technology

[0018] It can be seen from the above example that for frame S k In terms of MAD when noise occurs noise Value vs. MAD when objects move in the frame motion The values ​​may be equal, so it is difficult to judge according to the known judgment method whether the difference between most pixel values ​​on the front and back images is due to noise interference or object movement
[0019] If the dynamic image is misjudged as noise interference, it will cause distortion
Because the MAD in dynamic images is caused by object movement, fr

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Embodiment Construction

[0051] The foregoing and other technical contents, features and functions of the present invention will be clearly presented in the following detailed description of two preferred embodiments with reference to the drawings.

[0052] First Embodiment of Image Processing Device

[0053] refer to Figure 5 The first embodiment of the image processing device 9 of the present invention includes: a pixel difference calculator 91 , an edge (Edge) processing unit 92 , a noise level processing unit 93 , a mixed value determination unit 94 and an output unit 95 .

[0054]The pixel difference calculator 91 receives a current image 901 and a previous image 902 , wherein the current image 901 and the previous image 902 are respectively a frame (Frame), and each has a plurality of pixels (Pixel). Each pixel has a corresponding pixel value, the pixel value includes a luminance value (Luma) or a chrominance value (Chroma), and the pixel difference calculator 91 calculates the pixel value a...

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Abstract

The invention provides an image processing device and an image processing method. In the device and the method, whether the feature of each pixel in a current image is in a dynamic state or a static state is judged according to a boundary change condition between the current image and a previous image, and pixel differences corresponding to pixels in the static state in the current image are added to acquire the noise intensity of the current image. In addition, the device comprises a pixel difference calculator, a boundary processing unit and a noise level processing unit, wherein the pixel difference calculator is used for calculating the pixel differences among pixels corresponding to each position on the current image and the previous image; the boundary processing unit is used for processing boundary change around each pixel in the current image; and the noise level processing unit is used for calculating to acquire the noise intensity of the current image on the basis of the boundary change judged by the boundary processing unit.

Description

technical field [0001] The present invention relates to a device for judging noise intensity, in particular to a device for judging the noise intensity in image data. Background technique [0002] With the rapid evolution of video processing technology, the quality requirements for video content (Video Content) are getting higher and higher. High-quality, high-resolution video content has been widely used in various image display devices, such as: High Definition Television (HDTV) or Personal Computer Liquid Crystal Screen (LCD). Video content usually includes multiple frames (Frame) or field (Field), in the process of video processing or video transmission, some frames or fields may be affected by noise and change (for example: some pixel values (Pixel) changes), and on a high-resolution display device, it is particularly sensitive to noise on the video content, in other words, when the video content is disturbed by noise, it may be displayed on a high-resolution display d...

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Application Information

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IPC IPC(8): H04N5/217H04N5/21
Inventor 陈建成谢俊兴
Owner REALTEK SEMICON CORP
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