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Tham khảo tài liệu 'understanding and applying machine vision part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Page 187 Figure 8.19 Erosion operation courtesy of ERIM . Figure 8.20 Duality of dilation and erosion courtesy of ERIM . Page 188 Figure 8.21 Mathematical morphology in processing of PC board images courtesy of General Scanning SVS . The results of the first operation-closing are depicted in Figure 8.22 b . A difference image is shown in Figure 8.22 c . A threshold is taken on the difference image Figure 8.22 d . Filtering based on shape takes place to distinguish the noise from the scratch that is the detail that can fit in a structured element in the shape of a ring is identified in Figure 8.22 e and subtracted Figure 8.22 f . Figure 8.22 g depicts the segmented scratch displayed on the original image. Figure 8.22a-g Morphology operating on a scratch on manifold courtesy of Machine Vision International . Page 189 Figure 8.22 Continued. Page .
