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Flexible plane target for vision system scaling

A flat target and vision system technology, applied in the field of visual inspection, can solve the problems of difficulty in guaranteeing the processing accuracy of the target, increase the processing difficulty, etc., and achieve the effect of increasing the number, reducing the processing difficulty, and high processing precision.

Inactive Publication Date: 2009-02-18
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, in order to improve the calibration accuracy, it is generally necessary to set more marks on the target surface, which makes it difficult to guarantee the processing accuracy of the target and increases the difficulty of processing

Method used

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  • Flexible plane target for vision system scaling
  • Flexible plane target for vision system scaling
  • Flexible plane target for vision system scaling

Examples

Experimental program
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Embodiment

[0032] Such as Figure 4 As shown, all calibration points are numbered. Establish a plane target coordinate system with the upper left point as the center, the horizontal direction to the right as the x-axis, and the vertical downward direction as the y-axis. Calculate the coordinates of all calibration points on the target plane, as shown in Table 1.

[0033] Table 1 Coordinates of calibration point plane target coordinate system (unit: mm)

[0034] Numbering X Y Numbering X Y Numbering X Y 1 0 0 14 50 50 27 90 120

[0035]

2

75

0

15

60

30

28

50

125 3 150 0 16 100 25 29 37.5 112.5 4 0 75 17 112.5 37.5 30 25 100 5 75 75 18 125 50 31 60 120 6 150 75 19 90 30 32 50 100 7 0 150 20 100 50 33 30 90 8 75 150 21 120 60 34 75 37.5 9 150 150 22 125 100 35 112.5 75 10 25 50 23 112.5 112.5 36 75 112.5 11 37....

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Abstract

The related flexible place target for vision detection system comprises: a plane base to support the plot point, and nine black dots on the base to form a spare. This invention can improve the manufacture precision.

Description

technical field [0001] The invention belongs to the visual detection technology and relates to the improvement of the target required for the calibration of the visual system. Background technique [0002] As a high-tech, visual inspection technology has been widely used in aerospace, military, biomedicine, object recognition, text and image recognition, processing and manufacturing, industrial inspection, automation control and many other fields. The vision system is usually a flexible three-coordinate measurement system composed of multiple vision sensors, which can complete the measurement of large workpieces. Vision sensors can usually be divided into passive vision sensors and active vision sensors. They are generally composed of CCD cameras and light pattern projectors. Based on the perspective projection transformation theory, a mathematical model of the vision sensor can be established, and then the relevant parameters in the model can be determined through calibrati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00
Inventor 张广军孙军华魏振忠
Owner BEIHANG UNIV
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