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Outline-based transparency gradient image matting method

A transparency and outline technology, applied in the field of keying, can solve the problems of not being able to provide transparency gradient keying, lack of transparency and gradient cross effects in overlapping areas, and single keying methods

Active Publication Date: 2016-09-28
CHENGDU SOBEY DIGITAL TECH CO LTD
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AI Technical Summary

Problems solved by technology

The keying method is relatively single, and cannot provide more flexible transparency gradient keying from a certain contour to the corresponding contour of the image
The existing matting technology is based on image processing technology, which is mainly aimed at the matting of a selected area of ​​an image, and cannot achieve the overlapping effect of multiple selected contours or the cross effect of common matting of multiple images. Multiple intersecting keying areas of the same image lack the overlapping area transparency gradient cross effect

Method used

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  • Outline-based transparency gradient image matting method
  • Outline-based transparency gradient image matting method
  • Outline-based transparency gradient image matting method

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Embodiment Construction

[0038] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0039] Such as figure 1 As shown, the flow chart of the outline-based transparency gradient matting method includes the following steps:

[0040] S1. Obtain input data. The input data includes the image to be processed, control contour, feathering contour, feathering width and height data, feathering type and image operation type, and the control contour points correspond to the feathering contour points one by one.

[0041] In this embodiment, since each pixel needs to be calculated, the GPU is used for hardware acceleration to improve execution efficiency. Therefore, the image to be processed in the input data is stored in the video memory.

[0042] S2. Using a model-based mapping method to realize the transparency gradient of the image ...

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Abstract

The invention discloses an image transparency gradient matting method from a polygon outline to a target outline. The method comprises steps: outline path subdivision, vertex correspondence, outline polygon reconstruction and model mapping-based image matting frame are sequentially carried out on a to-be-processed image. The invention provides a gradient transparency generation algorithm for any image matting area formed from a control outline to an emergence outline in a surrounding mode, transparency gradient from the control outline to the emergence outline is controlled, any outline intersection model between the same emergence outlines can be supported, that is, certain emergence outlines can be intersected with other outlines to generate overlapped transparency gradient effects.

Description

technical field [0001] The present invention relates to the technical field of matting, in particular to a method for matting with gradient transparency based on outlines. Background technique [0002] As a method in the field of image processing, image matting has a wider and wider range of applications. The existing keying method is mainly based on a certain control contour, the image is deducted along the specified control contour, and then the feathering is carried out inward and outward along the edge of the image, so as to realize the entire keying process. The keying method is relatively single, and cannot provide a more flexible keying of the transparency gradient of the image from a certain contour to the corresponding contour. The existing matting technology is based on image processing technology, which is mainly aimed at the matting of a selected area of ​​an image, and cannot achieve the overlapping effect of multiple selected contours or the cross effect of co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T2207/20032
Inventor 王传经余军谢世斌
Owner CHENGDU SOBEY DIGITAL TECH CO LTD
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