Image purple edge correction device and method

A correction device and purple fringing technology, applied in the field of image technology processing, can solve the problems of detection deviation of purple fringing range, reduce the authenticity of images, etc., and achieve the effects of improving authenticity, reducing misjudgment, and improving accuracy

Pending Publication Date: 2021-12-28
SHANGHAI FULLHAN MICROELECTRONICS
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  • Application Information

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Problems solved by technology

These methods rely too much on a fixed threshold, which will lead to deviations in the purple fringe range detection. At the same time, using the method of reducing saturation may cause a large number of gray areas in the image, sacrificing the original color of the image, but reducing the color of the image. authenticity

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  • Image purple edge correction device and method
  • Image purple edge correction device and method
  • Image purple edge correction device and method

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Embodiment Construction

[0057]The specific implementation manner of the present invention will be described in more detail below with reference to schematic diagrams. The advantages and features of the present invention will be more apparent from the following description. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0058] Hereinafter, the terms "first", "second", etc. are used to distinguish between similar elements, and are not necessarily used to describe a specific order or chronological order. It is to be understood that these terms so used are interchangeable under appropriate circumstances. Similarly, if a method described herein includes a series of steps, the order in which these steps are presented is not necessarily the only order in which these steps can be performed, and some described steps may be omitted and / or ...

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Abstract

The invention provides an image purple edge correction device and method, and the device comprises an image input unit which is used for obtaining an input image and comprises a high-contrast region and a non-high-contrast region, and the high-contrast region comprising a purple edge region and a non-purple edge region; a purple color gamut weight calculation unit, used for calculating the purple color gamut weight according to the purple similarity of the input image; a high-contrast region weight calculation unit, used for calculating a high-contrast region weight according to the Gaussian gradient value of the input image; a purple edge range detection unit, used for calculating the range of a purple edge region according to the purple color gamut weight and the high contrast region weight; a global chromaticity correction unit for correcting red, blue, and green channel data of the entire input image; and a purple boundary correction data output unit, used for calculating purple boundary region correction data according to the range of the purple boundary region and the corrected global chromaticity. According to the device, the range of the purple edge area can be found out, and the purple edge area is corrected, so that the color of the purple edge area is close to the real color.

Description

technical field [0001] The invention relates to the field of image technology processing, in particular to an image purple fringing correction device and method. Background technique [0002] In nature photography, imperfections in a camera's imaging pipeline often result in some form of color noise and distortion. One of these phenomena is the formation of local edge effects near high-contrast (scene brightness contrast) areas. This effect will form a local uniform purple in the edge area, and the color gamut ranges from red-purple to blue-purple. Purple fringing for images. [0003] Traditional image purple fringing correction methods rely on an absolute, experimentally determined threshold to detect purple fringing, and correct purple fringing by reducing the saturation of purple fringing. These methods rely too much on a fixed threshold, which will lead to deviations in the purple fringe range detection. At the same time, using the method of reducing saturation may cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T7/90G06T7/11
CPCG06T5/008G06T7/90G06T7/11
Inventor 朱煜枫田景军
Owner SHANGHAI FULLHAN MICROELECTRONICS
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