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Machine-vision-based online dimensional measurement method of precise instrument

A machine vision and measurement method technology, applied in the field of image processing, can solve the problem of high precision requirements and achieve the effect of low hardware equipment requirements

Active Publication Date: 2013-09-11
宁波智能装备研究院有限公司
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Problems solved by technology

[0004] In order to solve the problem that modern industry requires high accuracy of workpiece measurement, the present invention provides an online size measurement method for precision devices based on machine vision

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  • Machine-vision-based online dimensional measurement method of precise instrument
  • Machine-vision-based online dimensional measurement method of precise instrument
  • Machine-vision-based online dimensional measurement method of precise instrument

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specific Embodiment approach 1

[0056] Specific implementation mode one, combining Figure 1-4 This specific embodiment will be described. An online size measurement method for precision devices based on machine vision, which includes the following steps:

[0057] Step 1: Adjust the camera to obtain a clear image of the standard device, and at the same time collect the template area in the clear image;

[0058] The template area is the image size of a standard device;

[0059] Step 2: Perform iterative threshold segmentation on the template area to obtain the segmentation threshold of the image, that is, perform binarization on the template area to obtain a binary image of the template area;

[0060] Step 3: Obtain the binary image of the image to be detected, and obtain the target area of ​​the image to be detected by template matching;

[0061] Step 4: Perform image processing on the target area of ​​the image to be inspected, obtain the edge of the device to be inspected for size measurement, and calcu...

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Abstract

A machine-vision-based online dimensional measurement method of precise instruments relates to a machine-vision-based dimensional measurement method and solves the problem of high-precision requirements on workpiece measurement in modern industry. The method comprises the steps of adjusting a camera to obtain a clear image of a standard instrument and meanwhile collecting a template area inside the clear image; performing iterative threshold segmentation on the template area to obtain the segmented threshold of the image, namely, binarizing the template area to obtain a binary image of the template area; obtaining a binary image of an image to be measured, and obtaining a target area of the image to be measured through template matching; performing image processing on the target area of the image to be measured to obtain the edges of an instrument to be measured, which is used for dimensional measurement, and calculating the pixel distances among the edges; calculating the relation between the pixel distances and the actual distances of the image; and calculating out the actual dimension of the instrument to be measured. The machine-vision-based online dimensional measurement method of precise instruments can be widely applied to the machine vision dimensional measurement of the precise instruments.

Description

technical field [0001] The invention is a size measurement method based on machine vision, which belongs to the field of image processing Background technique [0002] With the development of the electronic industry, aerospace industry and automobile industry, the accuracy of the workpiece is getting higher and higher. In the traditional workpiece inspection process, vernier calipers or screw micrometers are generally used for manual measurement, which has low efficiency and large randomness in measurement accuracy. It cannot meet the requirements of modern industry on the efficiency and accuracy of the measurement process. [0003] Traditionally, workers need to know the size of the qualified workpiece to judge whether the new workpiece is qualified, and then develop a machine vision method to simply compare the images of the qualified workpiece and the new workpiece to judge whether it is qualified, but the types of workpieces that can be judged in this way are small and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00
Inventor 高会军张世浩汪超于金泳
Owner 宁波智能装备研究院有限公司
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