Color-Based Printed Circuit Board Components Segmentation and Inspection
Date Issued
2011
Date
2011
Author(s)
Ning, Po-Ya
Abstract
The basic components on Printed Circuit Board include: the board, the copper, and the solder. Automatic optical inspection aims to segment the solder area and the copper area quickly where the solder is not totally coated on the copper. Our method can be briefly divided into three phases: extracting, thresholding, and inspecting.
The feature extraction aims to extract the details of image in different color space. Because the solder area has special bright points and color changes irregularly, the copper area has light reflection and fixed shape, thus solder and copper appear similar. According to those clues, we hope to extract all the possible details.
Thresholding aims to calculate the features based on extracting the brightness, shape, color of details, and the ratio of solder and copper. All the information can help later inspection.
Inspection aims to cross-match all useful information to get the optimal solder and copper locations, and then determine background. Experiment data show our method has high-speed and high-precision.
Subjects
Printed Circuit Board
Segmentation
Inspection
Type
thesis
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