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Due to color image contain more information than grayscale image, color image processing is being paid more and more attention. The methods of grayscale image segmentation just consider the brightness and neglect hue, saturation and other important information. Only using gray information can not extract the correct target area quickly. In this paper, selecting chip components as research object, completing the conversion of the color space based on the theory of Graphic and Image processing and achieving the conversion from the non-uniform RGB color space to HSV space for human eyes observation by means of MATLAB. Choose the better H domain as segmentation object. After that removing noise, filter and image enhancement by using technology of image preprocessing. Combine the operation of mathematical morphological with OTSU method to conduct the segmentation of H domain. The results show that at the same case of using the same segmentation method, using the color image segmentation containing the information of Hue and saturation can obtain better object, while the grayscale method can not. The image of solder joint by utilizing the color image segmentation can provide foundation for the subsequent extraction of solder joint quality information.
Zhu et al. (Mon,) studied this question.