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 image, it is also easy to produce moving afterimages when filtering the moving objects in the image, so it is easy to watch cause discomfort
In addition, using multiple images to process is highly complex and computationally intensive, so it is difficult to meet the needs of real-time noise removal

Method used

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Embodiment Construction

[0042] figure 1 is a flow chart of a noise suppression method according to an embodiment of the present invention. The noise suppression method described in this embodiment is to use at least one reference image to filter out the noise in the source image. OxideSemiconductor, CMOS) and other digital image capture devices for image sensing components, such as digital cameras or digital video cameras, etc. Since the image sensing element can only detect the intensity of light but cannot distinguish the wavelength of light, it cannot distinguish the color, so it is necessary to install a Bayer filter in front of the image sensing element to filter out red light and blue light respectively. And green light, and then in order to obtain the intensity of red, blue and green. In other words, in the source image to be denoised in this embodiment, each pixel has a corresponding red channel (R color channel), first green channel (Gr color channel), The pixel value of one of the second...

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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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