Color-Based Printed Circuit Board Segmentation

Our method can be briefly divided into three phases: training phases, thresholding phase, and refining phase. We only have to train once. We do not have to train again until we have different color PCB (Printed Circuit Board) images. Thresholding and refining phases are used to segment every image.he goal of training phase is to calculate the centroid of solder color. In thresholding phase, apply an automatic threshold finding algorithm to find the threshold recursively. After thresholding, we want to obtain better result. Consequently, we use connected component analysis to remove the component with too many or too few elements, because solder area is not too big or too small. Calculate the minimum color distance d from the centroid of solder color to connected component.ur method is effective for solder image segmentation. Experiment data show us this method has high-speed and high-precision.