Morphology-based detection method and system for preform gate wire drawing

Abstract

The present invention relates to the technical field of image processing, and in particular to a method and system for detecting wire drawing of a preform gate based on morphology. The method includes: acquiring an image of a preform gate, and extracting Preform gate drawing, to obtain a binary image, the value of the preform gate pixel and / or preform gate drawing pixel in the binary image is the first value, and the value of other pixels is the second value; Kernel performs dilation operation on the binarized image to obtain several dilated images; based on the binarized image and several dilated images, the optimal dilated kernel is determined according to the difference of noise points in the image before and after dilation; based on the optimal dilated kernel, the binarized image is After the expansion operation, the connected domain analysis is performed; all connected domains that may be the preform gate wire drawing are obtained, and the detection of the preform gate wire drawing is performed according to the area of ​​the obtained connected domain. The invention can accurately detect wire drawing defects.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a morphological-based detection method and system for gate wire drawing of bottle preforms. Background technique [0002] The overheating at the gate point of the preform makes the gate residue not cleanly separated from the mold during the product demoulding process, the valve needle is not closed properly, and the preform decompression is not appropriate after the mold is opened, etc. Pull into filaments at the mouth point. However, most of the existing ones are artificially detecting whether there is wire drawing at the gate of the preform, which is inefficient and easy to miss. SUMMARY OF THE INVENTION [0003] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a morphological-based detection method and system for the gate wire drawing of the preform, and the technical scheme adopted is as follows: [0004] In a firs...

AI Technical Summary

Problems solved by technology

[0002] Overheating at the gate of the preform prevents the stub of the gate from being cleanly separated from the mold during the demolding process, improper closing of the valve needle, and improper decompression of the preform after the mold is opened, all of which will cause the melt to flow from the pouring drawn into filaments

However, most of the existing methods are artificially detecting whether there is wire drawing at the gate of the preform, which is inefficient and easy to miss.

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