Xử lý ảnh trong cơ điện tử: Machine Vision. Chapter 5. Morphological Image Processing89

TRƯỜNG ĐẠI HỌC BÁCH KHOA XỬ LÝ ẢNH TRONG CƠ ĐIỆN Machine Vision Giảng viên: TS Nguyễn Thành Hùn Đơn vị: Bộ môn Cơ điện tử, Viện Cơ Hà Nội, 2021 Chapter Morphological Image P Preliminaries Erosion and Dilation Opening and Closing Some Basic Morphological Algorithms Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Preliminaries ➢ Morphological operations are defined in terms of sets ➢ In image processing, we use morphology with two types of sets of pixels: ob elements (SE’s) Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Preliminaries ❖Reflection Structuring elements and their reflections about the origin (the x’s are don’t care e of an SE about its o the dots denote the origin) Reflection is rotation by 180 Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Preliminaries ❖Translation (a) A binary image containing one object (set), A (b) A structuring elemen (c) Image resulting from a morphological operation Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Chapter Morphological Image P Preliminaries Erosion and Dilation Opening and Closing Some Basic Morphological Algorithms Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Erosion and Dilation ❖Erosion ➢ For image: I is a rectangular array of foreground and background Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Erosion and Dilation ❖Erosion Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Erosion and Dilation ❖Erosion ➢ Example Us co wi pix Im str ele Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Erosion and Dilation ❖Dilation (a) Image I, background origin) (c) D (d) Elongate element The boundary of Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Opening and Closing ❖Using opening and closing for morphological filtering Opening vs Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Chapter Morphological Image P Preliminaries Erosion and Dilation Opening and Closing Some Basic Morphological Algorithms Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Some Basic Morphological Alg ❖Boundary Extraction Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Some Basic Morphological Alg ❖Boundary Extraction (a) A binary image (b) Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Some Basic Morphological Alg ❖Hole Filling Hole filli containe of I (c) S the foreg computa hole, set Eq (9-1 (a) and (h Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Some Basic Morphological Alg ❖Hole Filling (a) Binary image The white dots inside the regions (shown enlarge the starting points for the hole-filling algorithm (b) Result of fillin Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Some Basic Morphological Alg ❖Extraction of Connected Components (a) S cont com a1i com the i Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Some Basic Morphological Alg ❖Extraction of Connected Components (a) Xbone f image clarity SE of conne Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Some Basic Morphological Alg ❖Convex Hull (a) Structuring elemen convergence with the s (a) (g) Convex hull (h contribution of each st Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Some Basic Morphological Alg ❖Convex Hull (a) line sho Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Some Basic Morphological Alg ❖Thinning Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Some Basic Morphological Alg ❖Thinning (a) Struct Result of Result of of thinnin was no ch Result of again (l) Result co Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Some Basic Morphological Alg ❖Skeletons (a) ma par (c) cen of ske Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Some Basic Morphological Alg ❖Skeletons Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Some Basic Morphological Alg ❖Skeletons Imp thr at t ske fou set col Rafael C Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) .. .Chapter Morphological Image P Preliminaries Erosion and Dilation Opening and Closing Some Basic Morphological Algorithms Rafael C Gonzalez, Richard E Woods, “Digital image processing,”... Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Chapter Morphological Image P Preliminaries Erosion and Dilation Opening and Closing Some Basic Morphological Algorithms Rafael... Gonzalez, Richard E Woods, “Digital image processing,” Pearson (2018) Chapter Morphological Image P Preliminaries Erosion and Dilation Opening and Closing Some Basic Morphological Algorithms Rafael