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Image edge false color suppression method and device

A technology of image edge and false color, which is applied in the field of image edge false color suppression method and device, and can solve the problems that other false colors cannot be suppressed and the range of false color suppression is narrow.

Active Publication Date: 2018-05-15
SHENZHEN INFINOVA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for suppressing false colors at image edges, aiming to solve the problem that the existing methods can only suppress false colors of purple fringe but not other false colors, resulting in too narrow false color suppression range

Method used

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  • Image edge false color suppression method and device

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Embodiment 1

[0023] figure 1 A flow chart of a method for suppressing false color at the edge of an image provided by the first embodiment of the present invention is shown, and the details are as follows:

[0024] Step S11, acquiring real-time image data.

[0025] In this step, the real-time image data includes real-time image data corresponding to general pictures and real-time image data corresponding to video, and the format of the real-time image data is data in YUV format. When the acquired real-time image data is data in a non-YUV format, converting the acquired real-time image data in a non-YUV format into real-time image data in a YUV format.

[0026] Step S12, performing chroma transient enhancement filtering and median filtering on the real-time image data.

[0027] Among them, the chroma transient enhancement (Transient Improvement, TI) filter is mainly used for filtering out false colors with high saturation and wide range, such as purple fringing; while the median filter is...

Embodiment 2

[0038] figure 2 A specific flow chart of step S12 is shown, which is described in detail as follows:

[0039] In order to reduce hardware resource consumption, when performing chroma transient enhancement filtering and median filtering on real-time image data, both are divided into horizontal and vertical two parts for processing. State enhancement filtering and median filtering, including:

[0040] Step S121 , performing chroma transient enhancement filtering and median filtering in the vertical direction on the real-time image data at the same time. Specifically, in order to improve the processing speed of real-time image data, RAM can be used to cache 8 lines of real-time image data first, and an m×m window is provided, and then vertical chroma TI filtering and median Filtering, wherein the m>0, for example, the above-mentioned m×m matrix may be a 9×9 matrix. It should be pointed out that when performing vertical filtering on real-time image data, chroma TI filtering an...

Embodiment 3

[0077] image 3 It shows a structural diagram of an image edge false color suppression device provided by the third embodiment of the present invention. The image edge false color suppression device is mainly aimed at the real-time digital video of the camera, such as the real-time video data whose implementation platform is FPGA. Color suppression, which can also suppress false colors for pictures on the PC software platform. For ease of description, only parts related to the embodiments of the present invention are shown.

[0078] The image edge false color suppression device includes: a real-time image data acquisition unit 31 , a filtering unit 32 , a first filtering result output unit 33 , and a second filtering result output unit 34 . in:

[0079] The real-time image data acquiring unit 31 is configured to acquire real-time image data.

[0080] Wherein, the real-time image data includes real-time image data corresponding to general pictures, and also includes real-tim...

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Abstract

The present invention is suitable for the field of image real-time video processing, and provides an image edge false color suppression method and device. The method includes: acquiring real-time image data; and performing chroma transient enhancement filtering and median filtering on the real-time image data. ; When there is an oversaturated area around the current real-time image data, the filtering result of the chroma transient enhancement filter is used as the output real-time image data; when there is no oversaturated area around the current real-time image data, the median filtered result is used The filtering results are output as real-time image data. Through the above method, purple fringing and various other edge false colors can be suppressed.

Description

technical field [0001] Embodiments of the present invention belong to the field of real-time video processing of images, and in particular relate to a method and device for suppressing false colors at image edges. Background technique [0002] In the camera imaging system, due to the relationship between the optical dispersion of the lens, there will be lateral chromatic aberration and longitudinal chromatic aberration. These lateral chromatic aberrations and longitudinal chromatic aberrations appear as false colors such as purple fringes, green fringes, yellow fringes, and blue fringes on the edges of the formed image. The moiré pattern produced by the limitation of the imaging capability of the imaging system will also be accompanied by edge false colors. In addition, some algorithms of digital image processing will also produce abnormal color blocks at the edge of the image. For example, color interpolation algorithms may produce false colors in high-frequency edge parts....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00H04N9/64
CPCH04N9/646G06T5/77
Inventor 李修新范铁道刘付辉生
Owner SHENZHEN INFINOVA
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