Color ring resistor detection method and device and automatic optical detection system

Abstract

The invention relates to a color ring resistor detection method and device and an automatic optical detection system. The method comprises the steps that the image of a circuit board to be detected is acquired; the image of a color ring resistor is extracted from the image of the circuit board; the candidate area of a color ring included in the color ring resistor is determined based on the image of the color ring resistor; color-identifying is carried out on the candidate area of the color ring to acquire the color value of the color ring; and the color ring resistor is detected based on the color value of the color ring. According to the invention, the hardware cost and the labor cost are effectively saved, and the detection speed of the color ring resistor is greatly improved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method for detecting color ring resistance, a detection device for color ring resistance and an automatic optical detection system. Background technique [0002] Automated Optical Inspection (AOI, Automated Optical Inspection) is a necessary part of the industrial production process, and has been widely used in TFT-LCD (thin film transistor-liquid crystal display, thin film transistor liquid crystal display), transistors and PCB (Printed Circuit Board, printed Circuit boards) and other industrial production, but in the people's livelihood, it extends to the security system. It uses machine vision as a standard inspection technology, uses optical methods to obtain the surface state of finished products, and uses image processing to detect foreign objects or surface defects. [0003] Fault, omission and reverse detection of electronic components is a common application in th...

AI Technical Summary

Problems solved by technology

In the traditional technology, the defect detection of color ring resistors by AOI system generally focuses on the detection of missing parts, while the detection of wrong and reverse parts of color ring resistors needs to be carried out manually with the help of additional color ring resistor identification auxiliary equipment, such as color ring resistors. Resistance direct reading card, color ring resistance identification instrument, etc. This solution requires additional hardware and manpower, and the cost is high

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