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Sports detecting method

A technology of motion detection and motion information, which is applied to TV, color TV parts, electrical components, etc., can solve the problem of high cost

Active Publication Date: 2005-10-26
VIMICRO ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, what the present invention needs to solve is exactly the problem that the cost of the storage space required for the reference frame is relatively high during the motion detection process, and after reducing the storage space, the motion detection can still provide some basic images. Motion information, such as whether there is a moving object, which area the moving object is in the image, etc.

Method used

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  • Sports detecting method
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Embodiment 1

[0029] In this embodiment, all image frames are obtained; the previous frame image of each frame image is selected as its reference frame, that is, the reference frame of the nth frame of the current frame is the n-1th frame, and the nth frame is the n+th frame The reference frame of 1 frame of image; the method of dividing each area equally; and motion detection is performed on all areas of the image.

[0030] The motion detection method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] Step 1, get the image sequence.

[0032] Get all image frames. Assume that the image format for motion detection is VGA format, and each frame of image contains 640*480 pixels; the image is a grayscale image, and the data in each pixel is a grayscale value.

[0033] Step 2, dividing the current frame image into several regions.

[0034] In this embodiment, the method of evenly dividing each area is adopted, such as figure 2 ...

Embodiment 2

[0051] In this embodiment, all image frames are obtained; background frames are selected as reference frames; the image is divided according to the location of the motion detection area instead of dividing the area equally; motion detection is only performed on a part of the area.

[0052] Step 1, get the image sequence.

[0053] Get all image frames. The image required for motion detection is assumed to have a size of 640*480 pixels, and the data contained in the pixels is in YUV format. Because the human eye is sensitive to brightness, the brightness component Y can be selected as the image data to be processed.

[0054] Step 2, divide the image into several regions.

[0055] In this embodiment, the image is divided according to the position of the motion detection area. For the division method of each area of ​​the image, see image 3 , there is a window on the upper left in the figure, and two doors on the lower right. The user needs to obtain the motion information of ...

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PUM

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Abstract

This invention discloses a motion test method including the following steps: a, obtaining the image sequence, b, dividing the current frame image into several zones, c, calculating and storing characters related to the motion information, d, comparing the relative character of the motion information of each zone with that of related zones in the reference frame image, if the absolute value of the difference is grater than the designed threshold value, it is determined that motion objects exist in said zone, otherwise, it shows there is no motion object in said zone.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a motion detection method. technical background [0002] Currently commonly used motion detection methods all need to store a reference frame in advance to compare with the current frame. For example, the steps of a motion detection method include calculating the difference between the brightness values ​​of each pixel in each macroblock in the image between the current frame and the reference frame, comparing the difference with a set threshold, and judging the difference Whether there is motion in the pixel, and then obtain the motion information of each macroblock or even the whole frame of image. [0003] However, in some cases, such as when using low-end cameras, the cost of the memory units required to store a reference frame is not acceptable. Contents of the invention [0004] In view of this, what the present invention needs to solve is exactly the problem tha...

Claims

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Application Information

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IPC IPC(8): H04N5/14
Inventor 王浩夏煜
Owner VIMICRO ELECTRONICS CORP