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Method, device and pick-up head for dividing and obtaining foreground image

A foreground image and current image technology, applied in the field of image processing, can solve the problem of slow foreground image extraction, and achieve the effect of improving the speed of segmentation and acquisition, reducing the area, and reducing the amount of calculation.

Active Publication Date: 2014-05-21
BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] In view of this, the technical problem to be solved by the present invention is to provide a method for segmenting and obtaining foreground images to solve the problem in the prior art that the extraction speed of foreground images is relatively slow due to the need for a large number of calculations

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  • Method, device and pick-up head for dividing and obtaining foreground image
  • Method, device and pick-up head for dividing and obtaining foreground image
  • Method, device and pick-up head for dividing and obtaining foreground image

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Embodiment Construction

[0069] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0070] The technical solution provided by the present invention is based on the existing graph-cut algorithm for foreground segmentation, and uses inter-frame information for video images to re-segment only the areas that may change, reducing the area of ​​the image area to be processed, thereby reducing The calculations required to obtain the first connection energy and the second connection energy when constructing an image are described.

[0071] refer to figure 2 , shows a flow chart of an embodiment of a method for segmenting and acquiring a foreground image according to the present invention, which specifically includes the following steps:

[0072] Step 201: taking the previous image as the first reference image of the cu...

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Abstract

The invention provides a method for obtaining a foreground image by segmenting, a device and a camera. The method comprises the following steps: a prior image is taken as the first reference image of a current image, and a foreground identification image of the prior image is taken as the second reference image of the current image; the current image is compared with the first reference image and the second reference image, a pixel area to be processed is determined according to the comparison result; a foreground image of each pixel area to be processed is obtained by segmenting; and all the foreground images of all the pixel areas to be processed are pieced together to form the foreground image of the current image. By utilizing the inter-frame information of a video image, only the area which can possibly change is re-segmented, the area of image areas to be processed is reduced, thereby reducing the calculation amount of segmenting and extracting the foreground images and greatly improving the speed of segmenting and obtaining of the foreground images.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a method, device and camera for segmenting and acquiring foreground images. Background technique [0002] Foreground extraction is a technique often used in video processing. Such as figure 1 As shown, under the prior art, the graph-cut (graph segmentation) algorithm is used to segment the image, thereby obtaining the foreground of the image, and the steps include: [0003] Step S11, initialize a series of background images of the video image to form a color model p(X)=N(μ, ∑) of the background pixels, the color feature can be taken as a one-dimensional brightness component, or can be taken as R, G, B multi-dimensional For color information, the model can be taken as a Gaussian model or a mixed Gaussian model; [0004] Step S12, determining foreground pixels; [0005] The process of determining the foreground pixels can be as follows: calculate the pixel diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T5/50
Inventor 邓亚峰黄英谢东海
Owner BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD