Visual measuring system based on self-adapting targets and calibrating method thereof

A calibration method and visual measurement technology, which are applied in the application field of computer vision technology, can solve the problems of increasing the operational complexity of the calibration process, adverse effects of calibration accuracy, and a small number of marking points, and achieve high reliability, simple production and low cost. Effect

Active Publication Date: 2011-09-07
SHENZHEN ESUN DISPLAY
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Problems solved by technology

However, the number of marker points on this type of target is often very small, and the constraints on the external parameters of the camera that can be provided are correspondingly reduced. It requires the target to change its posture multiple times in the public field of view, which increases the operational complexity of the calibration process. , will also have an a

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  • Visual measuring system based on self-adapting targets and calibrating method thereof
  • Visual measuring system based on self-adapting targets and calibrating method thereof
  • Visual measuring system based on self-adapting targets and calibrating method thereof

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[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0022] In the embodiment of the present invention, the target is constructed based on the sample of the workpiece to be tested, and the construction of the target can be completed by simply pasting the coding mark points on the surface of the workpiece. During the measurement, all cameras in the system can see the target at the same time. All cameras in the system are calibrated at the same time, there is no transmission and accumulation of calibration errors, so the calibration accuracy is high.

[0023] figure 1 The implementation process of the calibration method of the vision measurement sy...

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Abstract

The invention provides a visual measuring system based on self-adapting targets and a calibration method thereof, wherein the system and method provided by the invention are applicable to the technical field of computer vision. In the embodiment of the invention, the targets are constructed based on the samples of the to-be-detected workpieces by sticking a code mark on the surface of the workpiece, so that the manufacturing is simple without mechanical processing. Digital cameras and scales are used for regulating the target and can be recycled for regulating a plurality of targets, so that the cost is low. The cameras in the system ensure that the targets can be seen during a measuring process, so the cameras in the system can be calibrated simultaneously; and the calibration error is not delivered and accumulated, so that the calibration precision is high. The targets can be directly moved and placed by a mechanical device in a production line; and the method is especially applicable to online calibration.

Description

Technical field [0001] The invention belongs to the application field of computer vision technology, and particularly relates to a vision measurement system based on an adaptive target and a calibration method thereof. Background technique [0002] The structured light-based visual measurement system has the advantages of non-contact, fast speed, high accuracy, and high data density. It has a wide range of applications in industrial production fields such as reverse engineering, quality control, and defect detection. For the vision measurement system, system calibration is the main factor that affects the measurement accuracy, and precise system calibration ensures the measurement accuracy of the system to a large extent. [0003] In the vision measurement system, the camera is the basic unit of the system. System calibration is the process of determining the internal parameters of each camera in the system and determining the positional relationship (structural parameters) betwee...

Claims

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Application Information

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IPC IPC(8): G01C25/00G01B11/00
Inventor 彭翔殷永凯刘晓利李阿蒙
Owner SHENZHEN ESUN DISPLAY
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