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A false color suppression method and device

A pseudo-color and color technology, applied in the direction of color signal processing circuits, etc., can solve the problems of misjudgment of the area in the template, inability to distinguish color noise, etc.

Active Publication Date: 2016-09-14
ZHEJIANG UNIVIEW TECH CO LTD
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Problems solved by technology

If the noise reduction template is smaller than the false color area, the color inside the template is almost the same as the color of the surrounding area of ​​the template, and the color noise cannot be distinguished, and the area inside the template will be misjudged as a normal color

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  • A false color suppression method and device
  • A false color suppression method and device

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] The present invention provides a device for suppressing false color, which is described below by taking the implementation of a logic device as an example, but the present invention does not exclude other implementations such as hardware or software. Such as figure 1 As shown, the device runs on a logic device, and the device includes a color area judging unit, a line-dense area judging unit, a false color area judging unit and a saturation adjustment unit. At the same time, there is also a chromaticity space conversion unit running on the logic device, which will cooperate with this device to realize false color suppression in the following specific implementation manners. Please refer to figure 2 , the use and operation process of the device includes the following steps:

[0021] Step 101, the color area judging unit judges whether the preset area is a c...

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Abstract

The present invention provides a method and device for suppressing false colors, which are applied to image processing equipment. The method includes: judging whether the preset region is a color region according to the chromaticity of the preset region; , to determine whether the preset area is a line-intensive area; if the preset area is both a color area and a line-intensive area, then confirm that the preset area is a false color area; if the preset area is a false color areas, false color is suppressed by desaturating the preset area. The invention provides a method for suppressing large-area false colors by using a template with a limited size, so that false colors can be obviously suppressed under limited natural color loss.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a false color suppression method and device. Background technique [0002] In the ISP (Image Signal Processing, image signal processing) operation, the independent operation of the three components of RGB often destroys the original proportional relationship of the three components of RGB, thereby introducing false colors. Such as figure 1 The area shown in the dotted rectangular frame is the pseudo-color area. False colors generally appear in areas with dense lines, and the denser the lines, the easier it is to produce false colors. [0003] In theory, false color belongs to color noise. If it is measured in YCbCr space, false color can be regarded as noise on the Cb and Cr planes. Therefore, it can be suppressed by general noise reduction algorithms, such as in Cb and Cr spaces respectively. Perform algorithms such as median filtering, mean filtering, and erosion an...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/64H04N9/68
Inventor 羊海龙李婵
Owner ZHEJIANG UNIVIEW TECH CO LTD
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