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Vision measurement method for ice cream stick plane contour dimensions

A plane profile and visual measurement technology, applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problems that the measurement technology cannot be applied, and achieve the effects of easy real-time dynamic measurement, high reliability, and easy standardized production

Inactive Publication Date: 2014-04-30
陈涛
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Problems solved by technology

[0006] In order to overcome that the existing measurement technology cannot be applied or can not be well applied to the online automatic measurement of the plane profile size of ice cream sticks, the present invention proposes a visual measurement method for the plane profile size of ice cream sticks based on machine vision theory, which can realize automatic and accurate measurement. And it has the characteristics of good convenience and high reliability

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  • Vision measurement method for ice cream stick plane contour dimensions
  • Vision measurement method for ice cream stick plane contour dimensions
  • Vision measurement method for ice cream stick plane contour dimensions

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Embodiment Construction

[0053] The specific embodiment of the present invention will be described in detail in conjunction with the following measurement examples.

[0054] Step 1, measuring system calibration.

[0055] Select a standard circular template of known size, place it directly under the camera and at the same level as the ice cream stick to be tested; then perform image acquisition, target recognition, and contour detection on it to obtain the edge profile of the circular template; further Hough transform is performed on the contour image to obtain the circle fitting result of the contour, so that the diameter of the circle is measured to be 220 pixels; the actual size of the diameter of the circular template in the example is 20 mm, so the system calibration coefficient K=0.09 mm / pixel.

[0056] Step 2: Utilize the CCD camera to image the ice cream stick to be tested, and transfer it to the computer system through the image acquisition card, and the collected ice cream stick image is as f...

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Abstract

The invention relates to a vision measurement method for ice cream stick plane contour dimensions. The method comprises nine measurement steps that (1) a digital camera is used for collecting an ice cream stick image; (2) threshold segmentation and maximum connected region extraction are carried out on the ice cream stick image to finish target recognition; (3) contour detection is carried out on the target image; (4) the extending direction of the target image is calculated; (5) a target is rotated to be in the horizontal direction; (6) the ice cream stick contour image is divided into three measurement regions according to the minimum enclosing rectangle and the rectangle width in the horizontal direction; (7) width measurement is carried out on the second measurement region; (8) arc detection is carried out on the first measurement region and the third measurement region respectively through Hough conversion, and the arc radius and the ice cream stick length are obtained; (9) system calibration is carried out, and image dimensions are converted to actual physical dimensions. The vision measurement method can be applied to non-contact automatic measurement of ice cream stick plane contour dimensions and has the advantages that the measurement result is accurate and reliable, and the measurement process is convenient and efficient.

Description

technical field [0001] The invention relates to the technical fields of machine vision, geometric dimension measurement and the like, in particular to a visual measurement method for the planar dimension of an ice cream stick. Background technique [0002] At present, the ice-cream stick that makes cold food ice-cream is made by the flat strip wood chip that gets (being chamfering processing) after face again by mechanical die-cutting. With the improvement of the automation of ice cream stick production, the requirements for the shape and plane profile size of the ice cream stick are getting higher and higher. Due to the reasons of natural wood raw materials and production technology, the semi-finished products produced are mixed with many products that cannot be used for subsequent production and use, so that a large amount of labor is required to participate in the selection of qualified products, which consumes a lot of energy. Manpower, wasting a lot of time, but also b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
Inventor 陈涛张铁英白福忠武建新陈晓东王凯捷
Owner 陈涛
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