\uc791\uc740 \uc6c0\uc9c1\uc784\uc5d0 \ub300\ud574 \uc11c\ub85c \uc778\uc811\ud55c \ud53d\uc140\uc758 \uc18d\ub3c4\uac00 \ube44\uc2b7\ud558\ub2e4.<\/li>\n<\/ul>\n1.1 \uc774\ub860\uc801 \ubc30\uacbd<\/h3>\n
Lucas-Kanade \ubc29\ubc95\uc740 \uc774\ubbf8\uc9c0\uc5d0\uc11c\uc758 \ubbf8\ubd84\uc744 \uc774\uc6a9\ud558\uc5ec \ubc1d\uae30 \ubcc0\ud654\uc640 \ud53d\uc140 \uc774\ub3d9 \uc0ac\uc774\uc758 \uad00\uacc4\ub97c \uc218\ud559\uc801\uc73c\ub85c \ud45c\ud604\ud569\ub2c8\ub2e4. \uc774 \uad00\uacc4\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \ud615\ud0dc\ub85c \ud45c\ud604\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n
\u2202I\/\u2202x * u + \u2202I\/\u2202y * v + \u2202I\/\u2202t = 0<\/p>\n
\uc5ec\uae30\uc11c I<\/strong>\ub294 \uc774\ubbf8\uc9c0 \ubc1d\uae30, u<\/strong>\uc640 v<\/strong>\ub294 \uac01 \ud53d\uc140\uc5d0\uc11c\uc758 x, y \ubc29\ud5a5 \uc18d\ub3c4\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4.<\/p>\n1.2 OpenCV\ub97c \uc774\uc6a9\ud55c Lucas-Kanade \uad6c\ud604<\/h3>\n
OpenCV\uc5d0\uc11c\ub294 Lucas-Kanade \ubc29\ubc95\uc744 \uc27d\uac8c \uad6c\ud604\ud560 \uc218 \uc788\ub294 \ud568\uc218\uc778 cv2.calcOpticalFlowFarneback<\/code>\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \ub2e4\uc74c\uc740 \ud30c\uc774\uc36c\uc744 \uc0ac\uc6a9\ud558\uc5ec Lucas-Kanade Optical Flow\ub97c \uad6c\ud604\ud558\ub294 \uc608\uc81c\uc785\ub2c8\ub2e4:<\/p>\nimport cv2\nimport numpy as np\n\n# \ube44\ub514\uc624 \ucea1\ucc98\ncap = cv2.VideoCapture('input_video.mp4')\n\n# \uccab \ubc88\uc9f8 \ud504\ub808\uc784 \uc77d\uae30\nret, old_frame = cap.read()\nold_gray = cv2.cvtColor(old_frame, cv2.COLOR_BGR2GRAY)\n\n# \ud2b9\uc131 \ud3ec\uc778\ud2b8 \ucc3e\uae30\np0 = cv2.goodFeaturesToTrack(old_gray, mask=None, maxCorners=100, qualityLevel=0.3, minDistance=7, blockSize=7)\n\n# \ub9c8\uc2a4\ud06c \uc0dd\uc131\nmask = np.zeros_like(old_frame)\n\nwhile True:\n ret, frame = cap.read()\n if not ret:\n break\n \n frame_gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)\n\n # Lucas-Kanade \ubc29\ubc95\uc73c\ub85c Optical Flow \uacc4\uc0b0\n p1, st, err = cv2.calcOpticalFlowPyrLK(old_gray, frame_gray, p0, None)\n\n # \ucd94\uc801\ub41c \ud3ec\uc778\ud2b8\ub97c \uadf8\ub9ac\uae30\n if p1 is not None:\n for i, (new, old) in enumerate(zip(p1, p0)):\n a, b = new.ravel()\n c, d = old.ravel()\n mask = cv2.line(mask, (a, b), (c, d), (0, 255, 0), 2)\n frame = cv2.circle(frame, (a, b), 5, (0, 0, 255), -1)\n\n img = cv2.add(frame, mask)\n\n cv2.imshow('Frame', img)\n old_gray = frame_gray.copy()\n p0 = p1[st == 1]\n\n if cv2.waitKey(30) & 0xFF == 27:\n break\n\ncap.release()\ncv2.destroyAllWindows()<\/code><\/pre>\n2. Farneback \ubc29\ubc95<\/h2>\n
Farneback \ubc29\ubc95\uc740 Optical Flow\ub97c \uacc4\uc0b0\ud558\ub294 \ub610 \ub2e4\ub978 \uae30\ubc95\uc73c\ub85c, \uc774\ubbf8\uc9c0 \ube14\ub85d \ubd84\uc11d\uc744 \ud1b5\ud574 \ubc00\uc9d1\ud55c \ud750\ub984\uc744 \ucc3e\uc2b5\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc740 \uac01 \ud53d\uc140\uc5d0 \ub300\ud574 \uc785\ub825 \uc774\ubbf8\uc9c0\uc758 \ub2e4\ud56d\uc2dd\uc744 \ub9de\ucd94\uace0, \uc774\ub97c \ud1b5\ud574 \ud750\ub984 \ubca1\ud130\ub97c \uacc4\uc0b0\ud558\ub294 \ubc29\uc2dd\uc785\ub2c8\ub2e4.<\/p>\n
2.1 \uc774\ub860\uc801 \ubc30\uacbd<\/h3>\n
Farneback \ubc29\ubc95\uc740 \uac01 \uc774\ubbf8\uc9c0 \ube14\ub85d\uc758 \ub2e4\ud56d\uc2dd\u903c\u8fd1\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud750\ub984 \ubca1\ud130\ub97c \uacc4\uc0b0\ud569\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc758 \ud575\uc2ec\uc740 \uc774\ubbf8\uc9c0 \uac04\uc758 \ubcc0\ud654\ub97c \ub9e4\uc6b0 \uc138\ubc00\ud558\uac8c \ucd94\uc801\ud560 \uc218 \uc788\ub2e4\ub294 \uc810\uc785\ub2c8\ub2e4.<\/p>\n
2.2 OpenCV\ub97c \uc774\uc6a9\ud55c Farneback \uad6c\ud604<\/h3>\n
OpenCV\uc758 cv2.calcOpticalFlowFarneback<\/code> \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec Farneback Optical Flow\ub97c \uc27d\uac8c \uad6c\ud604\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c\uc740 Farneback Optical Flow\ub97c \uacc4\uc0b0\ud558\ub294 \uc608\uc81c\uc785\ub2c8\ub2e4:<\/p>\nimport cv2\nimport numpy as np\n\n# \ube44\ub514\uc624 \ucea1\ucc98\ncap = cv2.VideoCapture('input_video.mp4')\n\n# \uccab \ubc88\uc9f8 \ud504\ub808\uc784 \uc77d\uae30\nret, old_frame = cap.read()\nold_gray = cv2.cvtColor(old_frame, cv2.COLOR_BGR2GRAY)\n\n# \ub9c8\uc2a4\ud06c \uc0dd\uc131\nh, w = old_gray.shape\nmask = np.zeros_like(old_frame)\n\nwhile True:\n ret, frame = cap.read()\n if not ret:\n break\n\n frame_gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)\n\n # Farneback \ubc29\ubc95\uc73c\ub85c Optical Flow \uacc4\uc0b0\n flow = cv2.calcOpticalFlowFarneback(old_gray, frame_gray, None, 0.5, 3, 15, 3, 5, 1.2, 0)\n\n # \ubca1\ud130\ud654 \ucc98\ub9ac\n for y in range(0, h, 10):\n for x in range(0, w, 10):\n fx, fy = flow[y, x]\n cv2.arrowedLine(mask, (x, y), (int(x + fx), int(y + fy)), (0, 255, 0), 1, tipLength=0.3)\n\n img = cv2.add(frame, mask)\n\n cv2.imshow('Frame', img)\n old_gray = frame_gray.copy()\n\n if cv2.waitKey(30) & 0xFF == 27:\n break\n\ncap.release()\ncv2.destroyAllWindows()<\/code><\/pre>\n3. Lucas-Kanade vs Farneback: \ube44\uad50<\/h2>\n
\uc774 \ub450 \ubc29\ubc95\uc740 \uac01\uae30 \ub2e4\ub978 \uc0c1\ud669\uc5d0\uc11c \uac15\uc810\uacfc \uc57d\uc810\uc744 \uac00\uc9d1\ub2c8\ub2e4. \ub2e4\uc74c\uc740 \ub450 \ubc29\ubc95\uc758 \ube44\uad50\uc785\ub2c8\ub2e4:<\/p>\n
\n\n\n| \ud2b9\uc9d5<\/th>\n | Lucas-Kanade<\/th>\n | Farneback<\/th>\n<\/tr>\n<\/thead>\n |
\n\n| \uc18d\ub3c4<\/td>\n | \ube60\ub984, \uc791\uc740 \uc601\uc5ed\uc5d0 \uc801\ud569<\/td>\n | \ub290\ub9bc, \uc804\uccb4 \uc601\uc5ed\uc5d0 \uc801\ud569<\/td>\n<\/tr>\n |
\n| \uc815\ud655\ub3c4<\/td>\n | \uc791\uc740 \uc6c0\uc9c1\uc784\uc5d0 \ub354 \uc815\ud655\ud568<\/td>\n | \ubcf5\uc7a1\ud55c \uc6c0\uc9c1\uc784, \uc804\uccb4 \ud750\ub984\uc5d0\uc11c \uc815\ud655\ud568<\/td>\n<\/tr>\n |
\n| \uc0ac\uc6a9 \uc6a9\ub3c4<\/td>\n | \ud2b9\uc9d5 \uc810 \ucd94\uc801 \ub4f1<\/td>\n | \ubc00\ub3c4 \ucd94\uc801, \uc804\uccb4 \ud750\ub984 \uc2dc\uac01\ud654 \ub4f1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n4. \uacb0\ub860<\/h2>\nLucas-Kanade\uc640 Farneback \ubc29\ubc95 \ubaa8\ub450 Optical Flow\ub97c \uacc4\uc0b0\ud558\ub294 \ub370 \uc720\uc6a9\ud558\uc9c0\ub9cc, \uac01\uc790\uc758 \uc7a5\ub2e8\uc810\uc774 \uc788\uc2b5\ub2c8\ub2e4. Lucas-Kanade \ubc29\ubc95\uc740 \uc18d\ub3c4\uc640 \uc791\uc740 \uc6c0\uc9c1\uc784\uc5d0 \ub354 \uc801\ud569\ud558\uace0, Farneback \ubc29\ubc95\uc740 \ub354 \ubcf5\uc7a1\ud55c \uc6c0\uc9c1\uc784\uc744 \ub2e4\ub8e8\ub294 \ub370 \uac15\uc810\uc744 \uac00\uc9c0\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uc0ac\uc6a9\uc790\ub4e4\uc740 \uc0c1\ud669\uc5d0 \ub9de\uac8c \uac01\uac01\uc758 \ubc29\ubc95\uc744 \uc120\ud0dd\ud558\uc5ec \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n \uc774\ub7ec\ud55c Optical Flow \uae30\ubc95\uc744 \uc0ac\uc6a9\ud558\uc5ec \ube44\ub514\uc624 \ubd84\uc11d, \uac1d\uccb4 \ucd94\uc801, \uc6c0\uc9c1\uc784 \uae30\ubc18 \uc778\ud130\ud398\uc774\uc2a4 \ub4f1\uc744 \uad6c\ud604\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. OpenCV\uc758 \uac15\ub825\ud55c \uae30\ub2a5\uc744 \ud65c\uc6a9\ud558\uc5ec \ub2e4\uc591\ud55c \ud504\ub85c\uc81d\ud2b8\uc5d0 \uc801\uc6a9\ud574 \ubcf4\uba70 \ucef4\ud4e8\ud130 \ube44\uc804\uc758 \uc7ac\ubbf8\ub97c \ub290\uaef4\ubcf4\uc2dc\uae38 \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n <\/body><\/p>\n","protected":false},"excerpt":{"rendered":" \ube44\ub514\uc624 \ucc98\ub9ac \ubc0f \ucef4\ud4e8\ud130 \ube44\uc804 \ubd84\uc57c\uc5d0\uc11c \uc6c0\uc9c1\uc784\uc744 \ucd94\uc801\ud558\ub294 \uac83\uc740 \ub9e4\uc6b0 \uc911\uc694\ud55c \uc791\uc5c5\uc785\ub2c8\ub2e4. \uc774 \uacfc\uc815\uc5d0\uc11c \uc8fc\ub85c \uc0ac\uc6a9\ud558\ub294 \uc54c\uace0\ub9ac\uc998 \uc911 \ub450 \uac00\uc9c0\ub294 Lucas-Kanade \ubc29\ubc95\uacfc Farneback \ubc29\ubc95\uc785\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \uac01\uac01\uc758 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc790\uc138\ud788 \uc124\uba85\ud558\uace0, \uac01\uac01\uc758 \uc7a5\ub2e8\uc810\uacfc \uc2e4\uc81c \uc0ac\uc6a9 \uc608\uc81c\ub97c \ube44\uad50\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4. 1. Lucas-Kanade \ubc29\ubc95 Lucas-Kanade\ub294 Optical Flow\uc758 \uc77c\uc885\uc73c\ub85c, \uc9e7\uc740 \uc2dc\uac04 \uac04\uaca9 \ub3d9\uc548\uc758 \uc774\ubbf8\uc9c0\uc5d0\uc11c\uc758 \ud53d\uc140 \uc774\ub3d9\uc744 \ucd94\uc815\ud558\ub294 \uae30\ubc95\uc785\ub2c8\ub2e4. \uc774 … \ub354 \ubcf4\uae30 “OpenCV \uac15\uc88c, Lucas-Kanade vs Farneback \ubc29\uc2dd \ube44\uad50”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[187],"tags":[],"class_list":["post-38794","post","type-post","status-publish","format-standard","hentry","category-opencv"],"yoast_head":"\nOpenCV \uac15\uc88c, Lucas-Kanade vs Farneback \ubc29\uc2dd \ube44\uad50 - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/atmokpo.com\/w\/38794\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"OpenCV \uac15\uc88c, Lucas-Kanade vs Farneback \ubc29\uc2dd \ube44\uad50 - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\" \/>\n<meta property=\"og:description\" content=\"\ube44\ub514\uc624 \ucc98\ub9ac \ubc0f \ucef4\ud4e8\ud130 \ube44\uc804 \ubd84\uc57c\uc5d0\uc11c \uc6c0\uc9c1\uc784\uc744 \ucd94\uc801\ud558\ub294 \uac83\uc740 \ub9e4\uc6b0 \uc911\uc694\ud55c \uc791\uc5c5\uc785\ub2c8\ub2e4. \uc774 \uacfc\uc815\uc5d0\uc11c \uc8fc\ub85c \uc0ac\uc6a9\ud558\ub294 \uc54c\uace0\ub9ac\uc998 \uc911 \ub450 \uac00\uc9c0\ub294 Lucas-Kanade \ubc29\ubc95\uacfc Farneback \ubc29\ubc95\uc785\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \uac01\uac01\uc758 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc790\uc138\ud788 \uc124\uba85\ud558\uace0, \uac01\uac01\uc758 \uc7a5\ub2e8\uc810\uacfc \uc2e4\uc81c \uc0ac\uc6a9 \uc608\uc81c\ub97c \ube44\uad50\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4. 1. 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