Noise point suppression method

A noise and pixel technology, applied in the field of noise suppression to eliminate image noise, can solve the problems of moving afterimage, large amount of calculation, uncomfortable viewing, etc., and achieve the effect of eliminating negative effects.

Active Publication Date: 2012-07-04
ALTEK SEMICON
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Problems solved by technology

However, since details such as edges or textures in the original image are often destroyed during processing, it is easy to produce blurred results after denoising
[0004] The time-based denoising method uses multiple images for processing. Although it can better preserve the details in the imag

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Example Embodiment

[0042] figure 1 It is a flowchart of a noise suppression method according to an embodiment of the present invention. The noise suppression method described in this embodiment uses at least one reference image to filter out the noise in the source image. This method is suitable for devices with charge coupled devices (CCD) or complementary metal oxide semiconductors (Complementary Metal- OxideSemiconductor (CMOS) and other digital image capturing devices for image sensing components, such as digital cameras or digital video cameras. Since the image sensor element can only detect the intensity of light but cannot distinguish the wavelength of the light, and therefore cannot distinguish the color, it is necessary to install a Bayer filter before the image sensor element to filter out the red light and blue light respectively. As well as green light, in order to obtain the intensity of red, blue, and green. In other words, in the source image to remove noise in this embodiment, ea...

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Abstract

The present invention provides a noise point suppression method for filtering noise points in a source image through a reference image, wherein, the arrangement mode of each pixel of the source image and the reference image accords with a Bell Figure color arrangement role. In the method, a first quasi image which corresponds with the source image and a second quasi image that corresponds with the reference image are generated. Total-domain movement vector between the first quasi image and the second quasi image is calculated. Dynamic compensation processing is performed on the reference image according to the total-domain movement vector for obtaining a plurality of dynamic compensation results. Furthermore the dynamic compensation results are used for performing time superposing processing on the source image for generating a first-stage noise point suppression image. Then spatial noise point elimination processing is performed on the first-stage noise point suppression image for generating second-stage noise point suppressing image.

Description

technical field [0001] The invention relates to an image processing method, in particular to a noise suppression method for eliminating image noise. Background technique [0002] The improvement of multimedia technology has made modern people's requirements for high-quality images increasingly higher. The image quality is closely related to the amount of noise generated during image capture, signal conversion, and transmission. In order to effectively remove noise and improve image quality, more and more attention has been paid to the research on noise removal in the field of image processing. Common noise removal methods can be divided into space-based de-noising processing methods and time-based de-noising processing methods. [0003] Space-based denoising processing methods are mainly for single image processing. However, since details such as edges or textures in the original image are often destroyed during processing, it is easy to produce blurred results after deno...

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Application Information

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IPC IPC(8): H04N5/357H04N5/367
Inventor 彭诗渊吴宗达
Owner ALTEK SEMICON
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