Method of measuring scene and geometric data of bodies inside the scene via single frame of image

A technology of single image and geometric information, applied to instruments, character and pattern recognition, computer components, etc., can solve problems such as difficult selection of control points, difficulty in putting into practical application, and inability to guarantee the measurement accuracy of control points. Good stickiness and high measurement accuracy

Inactive Publication Date: 2003-11-05
INST OF AUTOMATION CHINESE ACAD OF SCI
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Problems solved by technology

In this type of method, it is typical to reconstruct the three-dimensional structure of the scene under test by two or more images using stereo vision, but this method involves a classic problem in the field of computer vision, that is, the matching between multiple images. , so it is difficult to put into practical application
Another method is to manually measure the information of more than 4 control points in the s

Method used

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  • Method of measuring scene and geometric data of bodies inside the scene via single frame of image
  • Method of measuring scene and geometric data of bodies inside the scene via single frame of image
  • Method of measuring scene and geometric data of bodies inside the scene via single frame of image

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Embodiment

[0034] like Figure 4 Shown is an image of a tested scene. We use edge detection and line fitting algorithms to extract the known floor information and information of parallel lines perpendicular to the floor, and calculate the mapping relationship matrix, blanking line and blanking point, the reference distance is the height H of the iron cabinet 0 . According to the method of the present invention, select two points with the mouse in the image, and the distance between these two points in the scene can be directly obtained from the image, and the measurement results are as follows: Figure 4 shown. Among them, V is the volume of the round iron drum, it can be seen that the distance D 1 and D 2 It is difficult to measure in real space. The measured values ​​obtained by the method of the present invention are as Figure 4 shown. The real values ​​of the measured values ​​in the figure are as follows: the height H of a person 1 =171.5cm; control cabinet height H 2 =170...

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Abstract

The measurement of geometric data of scene and bodies in the scene via single frame of image includes the following steps: taking image of the scene and inputting it into computer; extracting the data of point and straight line in reference plane of the scene, parallel lines perpendicular to the plane and the reference distance; finding out the mapping matrix between the reference plane and the image plane; calculating the blanking point in the direction perpendicular to the reference plane and the blanking line of the reference plane; extracting the boundary information of the bodies to be measured in the image, sectional fitting to form the straight line or quadric curve and finding out the coordinate of center point of bodies; and measuring geometric data, including spatial coordinates, distance, angle, area, volume, etc. of scene and bodies in the scene.

Description

technical field [0001] The present invention relates to computer aided automatic measurement. Background technique [0002] In our daily life and in many fields, measurement is essential, such as traffic accidents, criminal crime scenes, buildings, construction sites, etc., require a lot of measurement work. The traditional method is to use manual measurement, which is very time-consuming and prone to large measurement errors, and this measurement is also prone to unfair results due to the subjective factors of the measurers. [0003] In recent years, with the development and application of computer vision, people have begun to explore the use of computer vision methods to measure through images. In this type of method, it is typical to reconstruct the three-dimensional structure of the scene under test by two or more images using stereo vision, but this method involves a classic problem in the field of computer vision, that is, the matching between multiple images. , so i...

Claims

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Application Information

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IPC IPC(8): G06K9/36G06K9/46
Inventor 王光辉吴福朝胡占义
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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