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Image processing method and image processor

An image processor and image processing technology, which is applied in the field of image processing and can solve problems such as being unsuitable for automatic real-time keying and the effect of keying effects.

Active Publication Date: 2015-07-29
MIGU CO LTD
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Problems solved by technology

And the lighting changes will also have a great impact on the keying effect of this method, which is not suitable for automatic real-time keying

Method used

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  • Image processing method and image processor
  • Image processing method and image processor

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Embodiment Construction

[0085] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0086] The invention provides an image processing method, such as figure 1 As shown, the method includes:

[0087] 101. Acquire a luminance component and a chroma component of each pixel in an input image, where the chroma component includes a blue chroma component and a red chroma component.

[0088] Wherein, the blue chrominance component and the red chrominance component are two chrominance components of a pixel. When processing a video image, a frame of ...

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Abstract

The invention provides an image processing method and an image processor, and relates to the field of image processing. The algorithm is simple, the image matting effect is lightly affected by change of lighting, and the method is suitable for real-time processing of an image. The method comprises the following steps: acquiring a brightness component and a chrominance component of each pixel point in an input image; counting chrominance component values of pixel points of the input image and determining the color corresponding to the pixel points with the highest occurrence rate as background color of the input image; dividing a chrominance coordinate system into a foreground region, a background region and an unknown region according to the background color; determining whether each pixel point in the input image belongs to the foreground region, the background region or the unknown region; determining whether the pixel point belonging to the unknown region belongs to the foreground region or the background region.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an image processing method and an image processor. Background technique [0002] Keying technology is to key out a certain monochromatic background in the picture from the picture. In this way, the characters shot indoors are superimposed with various scenes after keying, forming a magical artistic effect. Therefore, keying technology is widely used in advertising, film and television production, and remote video conferences, etc., to achieve better picture effects. [0003] There is a blue screen (blue background) matting method, which calculates its mask value α for each pixel 0 , α 0 =1-α 1 (B f -α 2 G f ), where 0.5≤α 2 ≤1.5, the B f is the blue chrominance component of the image, the G f is the green component of the image. Calculate to get α 0 , to achieve the effect of keying. [0004] When using this method to key images, the parameter α 1 、α 2 Adjustments t...

Claims

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Application Information

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IPC IPC(8): H04N5/272
Inventor 张德军王田刘波
Owner MIGU CO LTD
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