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Moving image detecting method

A technology for moving images and detection methods, applied in image data processing, image data processing, measuring devices, etc., can solve problems such as excessive calculation and waste of resources, achieve strong portability, improve judgment accuracy, and reduce calculation. Effect

Inactive Publication Date: 2006-08-30
VIMICRO CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, when it is only necessary to judge whether the image is moving, regardless of the speed and direction of the movement, using the above-mentioned "block average value" to judge, not only the amount of calculation is too large, but resources are wasted, and good judgment accuracy is achieved.

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Embodiment Construction

[0033] The identification and tracking of dynamic image files ultimately comes down to the processing of two static images. The present invention will be described in more detail below by taking an uncompressed RGB image as an example.

[0034] For 24bits uncompressed RGB images, the storage of image pixels follows the principle of left-to-right and bottom-up. For example, for a 24bits RGB image, the pixel in the lower left corner is stored at the front of the file data area, and the pixel in the upper right corner is stored at the end of the file. Each pixel occupies 3 bytes, and its B, G, and R channel values ​​are stored sequentially, from 0 to 255. These three channels represent the three optical primary colors of blue, green, and red respectively, and their values ​​represent their respective light intensities, among which 0 means no light, and 255 means the maximum light intensity. figure 1 It is the storage structure of 24bits uncompressed RGB image.

[0035] attache...

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Abstract

The moving image detecting method includes the following steps: intercepting one frame still image from one serial continuous images and accumulating the brightness values of the pixels in each row to obtain one first array; taking one other frame image to obtain the second array similarly; subtracting the corresponding row brightness values of the first array from the those of the second array and finding out those rows with absolute brightness value difference greater than some threshold T1 set beforehand or change; calculating the number of the rows with change and judging whether the two frames of images are moving images or still images based on whether the number is greater than some other threshold T2. When needing only judging whether the image is moving one, the said method has less calculation amount and high judgment precision.

Description

technical field [0001] The invention relates to a motion detection method, in particular to a motion image detection method, which judges whether there is motion by comparing the static images of the front and rear frames. Background technique [0002] The change of a group of moving images essentially corresponds to the brightness change of some / some specific parts in a frame. Comparing the brightness value change of each pixel with the threshold value, we can judge its static state, and then outline its moving edge. [0003] Many methods for motion detection and analysis have been proposed: [0004] Chinese patent CN 91111320.7 "Moving Target Image Trajectory Analysis Method" uses the image of the moving target to analyze the motion characteristics. For a group of continuous images of a moving target, when each frame of image arrives, it records the gray value of the position of the moving target on this frame of image by comparing the gray level, so as to form a gray le...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P13/00G06T1/00
Inventor 俞青赵原
Owner VIMICRO CORP