Tablet missing detection method and system based on machine vision

Abstract

The embodiment of the invention provides a tablet missing detection method and system based on machine vision, and the method comprises the steps: obtaining a standard image and a to-be-detected image of a tablet package, and carrying out the graying processing; threshold segmentation is carried out on the standard image according to a preset threshold range, and a first packaging area and a first tablet area are determined; performing threshold segmentation on the to-be-detected image according to a preset threshold range, and determining a second packaging area; coordinates of angular points of the first packaging area and the second packaging area are calculated, and a projection transformation matrix is calculated according to the coordinates of the angular points of the first packaging area and the second packaging area; projecting the first tablet area onto the to-be-detected image according to the projection transformation matrix to obtain a second tablet area, and obtaining a target image through matting; according to the obtained target image, the contrast ratio of the target image is calculated, and whether the tablets are missing or not is judged. The problems that omission is prone to occurring and the error rate is high in manual detection are solved.

Description

technical field [0001] This document relates to the technical field of visual inspection, in particular to a method and system for detecting missing pills based on machine vision. Background technique [0002] At present, it is a common packaging method to place the tablets in the tablet board of the aluminum-plastic blister. When packaging, the machine needs to package several tablets into the tablet board, and then put them into the corresponding packaging box and sell them in the market. Usually after the pills are encapsulated by the machine, in order to ensure the integrity and accuracy of the encapsulated pills, an inspection needs to be carried out. The current inspection is usually done manually, which is labor-intensive and error-prone, and there is no way to accurately detect the encapsulation. Error, when the pill board misses the pills and the pills are missing, or the number of pills encapsulated by the pill board is correct but the types of pills encapsulated i...

AI Technical Summary

Problems solved by technology

Usually, after the pills are packaged by the machine, an inspection is required to ensure the integrity and accuracy of the packaged pills. However, the current inspection is usually through manual inspection. Error, when the pill board leaks the pills and the pills are missing, or the number of pills packed in the pill board is correct but the type of pills packed in a certain area does not correspond, it is easy to miss manually, and the error rate is high

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