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Droplet contact angle and size measuring method based on image processing

An image processing and measurement method technology, applied in the field of image processing, can solve the problems of large error and low efficiency, and achieve the effect of small error, high efficiency and wide application range

Inactive Publication Date: 2020-06-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the traditional droplet contact angle measurement method has limitations, and the error is large and the efficiency is low

Method used

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  • Droplet contact angle and size measuring method based on image processing
  • Droplet contact angle and size measuring method based on image processing
  • Droplet contact angle and size measuring method based on image processing

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Embodiment Construction

[0049] Below in conjunction with accompanying drawing, further elaborate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0050] The invention provides a method for measuring the contact angle and size of a droplet surface based on image processing, comprising the following steps:

[0051] Step 1: Collect the droplet image as shown in figure 1 As shown, it is a series of images of the volatilization process of the droplet contacting the workpiece taken during the observation of the volatilization process of the droplet. There are about 600 experi...

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Abstract

The invention discloses a droplet contact angle and size measuring method based on image processing. The method is characterized by comprising the following processing steps: reading a droplet experiment contact picture acquired by a contact angle measuring instrument, processing the picture by utilizing median filtering and Gaussian filtering, and extracting an image contour by utilizing an imagecontour extraction algorithm; positioning the position of a workpiece contacted with the liquid drop by utilizing the processed contour image, searching and positioning the highest point position ofthe liquid drop and two points with the maximum transverse span by utilizing pixel gray scale, and then framing a liquid drop area to be processed; and finally, processing the frame selection area, firstly removing a middle interference small circle, then dividing a left lower area and a right lower area by utilizing the positioned key points, and finally positioning two contact points of the liquid drop which is in lowest contact with the workpiece. Compared with a traditional method, the method is higher in accuracy and stability, batch processing is achieved, the processing time of a singlepicture is within 0.1 s, and the measurement efficiency is greatly improved.

Description

technical field [0001] The invention relates to a method for measuring liquid drop contact angle and size based on image processing, which belongs to the field of image processing. Background technique [0002] Image processing is the technique of using a computer to analyze an image to achieve a desired result. Image processing generally refers to digital image processing. A digital image refers to a large two-dimensional array obtained by shooting with industrial cameras, video cameras, scanners and other equipment. The elements of this array are called pixels, and their values ​​are called grayscale values. Image processing technology generally includes three parts: image compression, enhancement and restoration, matching, description and recognition. Using image processing technology to convert images into digital information and transmit it to the digital world that people cannot perceive visually, the result is more direct. [0003] Traditional droplet contact angle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/60G06T5/00G01N13/02
CPCG06T7/60G01N13/02G06T2207/10004G06T2207/20032G01N2013/0208G06T5/70
Inventor 胡俊郭纯方咸凯强张美菊
Owner DONGHUA UNIV
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