{"id":38782,"date":"2024-11-02T00:57:03","date_gmt":"2024-11-02T00:57:03","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=38782"},"modified":"2024-11-26T06:43:21","modified_gmt":"2024-11-26T06:43:21","slug":"opencv-%ea%b0%95%ec%a2%8c-optical-flow%eb%a5%bc-%ec%9d%b4%ec%9a%a9%ed%95%9c-%ec%9d%b4%eb%8f%99%eb%9f%89-%ea%b3%84%ec%82%b0","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/38782\/","title":{"rendered":"OpenCV \uac15\uc88c, Optical Flow\ub97c \uc774\uc6a9\ud55c \uc774\ub3d9\ub7c9 \uacc4\uc0b0"},"content":{"rendered":"

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\uc18c\uac1c<\/h2>\n

\n \uc774\ubbf8\uc9c0 \ucc98\ub9ac \ubc0f \ucef4\ud4e8\ud130 \ube44\uc804\uc5d0\uc11c Optical Flow\ub294 \uc774\ubbf8\uc9c0 \uc2dc\ud000\uc2a4\uc5d0\uc11c \uac1d\uccb4\uc758 \uc6c0\uc9c1\uc784\uc744 \ucd94\uc801\ud558\uae30 \uc704\ud55c \uc911\uc694\ud55c \uae30\ubc95\uc785\ub2c8\ub2e4. \uc774 \uae30\uc220\uc740
\n \uc2dc\uac04\uc5d0 \ub530\ub978 \ud53d\uc140\uc758 \uc704\uc0c1 \ubcc0\ud654\ub97c \ubd84\uc11d\ud558\uc5ec \ubb3c\uccb4\uc758 \uc18d\ub3c4\uc640 \ubc29\ud5a5\uc744 \uacc4\uc0b0\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. Optical Flow\ub294 \ub2e4\uc591\ud55c \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.
\n \uc608\ub97c \ub4e4\uc5b4, \ube44\ub514\uc624 \uac10\uc2dc, \ub85c\ubd07 \ub0b4\ube44\uac8c\uc774\uc158, \ubaa8\uc158 \uac10\uc9c0 \ubc0f \uc2dc\uac01 \ud6a8\uacfc \uc0dd\uc131 \ub4f1\uc5d0\uc11c \uc720\uc6a9\ud569\ub2c8\ub2e4.\n <\/p>\n<\/section>\n

\n

Optical Flow\uc758 \uc6d0\ub9ac<\/h2>\n

\n Optical Flow\ub294 \uc2dc\uac04\uc5d0 \ub530\ub978 \uc774\ubbf8\uc9c0\ub97c \ud1b5\ud574 \ubb3c\uccb4\uc758 \uc6c0\uc9c1\uc784\uc744 \ucc3e\ub294 \ub370 \uc0ac\uc6a9\ub418\ub294 \ubc29\ubc95\uc73c\ub85c, \uac1d\uccb4\uac00 \uc2dc\uac04\uc774 \uc9c0\ub0a8\uc5d0 \ub530\ub77c \uc5b4\ub5bb\uac8c \ubcc0\ud558\ub294\uc9c0\ub97c \ubd84\uc11d\ud569\ub2c8\ub2e4.
\n Optical Flow\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc804 \uc815\uc758\ub41c \uc54c\uace0\ub9ac\uc998\uc744 \uae30\ubc18\uc73c\ub85c \ud558\uba70, \uac00\uc7a5 \ub9ce\uc774 \uc0ac\uc6a9\ub418\ub294 \ub450 \uac00\uc9c0 \ubc29\ubc95\uc740 Lucas-Kanade \ubc29\ubc95\uacfc Horn-Schunck \ubc29\ubc95\uc785\ub2c8\ub2e4.\n <\/p>\n

Lucas-Kanade \ubc29\ubc95<\/h3>\n

\n Lucas-Kanade \ubc29\ubc95\uc740 \uc9c0\uc5ed\uc801\uc73c\ub85c \uc791\uc740 \uc774\ubbf8\uc9c0 \uc601\uc5ed\uc744 \uac00\uc815\ud558\uc5ec, \uac01 \ud53d\uc140\uc5d0 \ub300\ud55c \uc6c0\uc9c1\uc784 \ubca1\ud130\ub97c \uacc4\uc0b0\ud569\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc758 \uae30\ubcf8 \uc544\uc774\ub514\uc5b4\ub294
\n \ub450 \uc778\uc811\ud55c \ud504\ub808\uc784 \uac04\uc758 \uac15\ub3c4\ub97c \uc77c\uc815\ud558\uac8c \uc720\uc9c0\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \uc774\ub294 \uad6d\uc18c\uc801\uc73c\ub85c \uac15\ub3c4\ub97c \ubcf4\uc874\ud55c \uc0c1\ud0dc\uc5d0\uc11c \ubbf8\ubd84 \ubc29\uc815\uc2dd\uc744 \uc138\uc6b0\uace0 \ud574\ub97c \uad6c\ud568\uc73c\ub85c\uc368 \uc774\ub8e8\uc5b4\uc9d1\ub2c8\ub2e4.\n <\/p>\n

Horn-Schunck \ubc29\ubc95<\/h3>\n

\n Horn-Schunck \ubc29\ubc95\uc740 \uc804\uc5ed\uc801\uc778 \uc815\ubcf4 \uae30\ubc18\uc758 \uae30\ubc95\uc73c\ub85c, \uc774\ubbf8\uc9c0 \uacbd\uacc4\uc5d0\uc11c\ub3c4 \ud750\ub984\uc758 \uc77c\uad00\uc131\uc744 \uc720\uc9c0\ud558\ub824\uace0 \ud569\ub2c8\ub2e4. \uc774 \ubc29\uc2dd\uc740 \ub9e4\ub044\ub7ec\uc6b4 \ud750\ub984 \ud544\ub4dc\ub97c \uc0dd\uc131\ud558\uae30
\n \uc704\ud574 \uacf5\uac04\uacfc \uc2dc\uac04\uc758 \uc77c\uad00\uc131\uc744 \ucd94\uac00\ud558\ub294 \uc81c\uc57d \uc870\uac74\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4.\n <\/p>\n<\/section>\n

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OpenCV\ub97c \uc774\uc6a9\ud55c Optical Flow \uad6c\ud604<\/h2>\n

\n OpenCV\ub294 Optical Flow\ub97c \uad6c\ud604\ud558\uae30 \uc704\ud55c \ub2e4\uc591\ud55c \ud568\uc218\uc640 \uba54\uc11c\ub4dc\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc774 \uac15\uc88c\uc5d0\uc11c\ub294 OpenCV\uc758 Lucas-Kanade \ubc29\ubc95\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc774\ub3d9\ub7c9\uc744 \uacc4\uc0b0\ud558\ub294 \ubc29\ubc95\uc744
\n \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4.\n <\/p>\n<\/section>\n

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\ud544\uc694\ud55c \ub77c\uc774\ube0c\ub7ec\ub9ac \uc124\uce58<\/h2>\n

\n Optical Flow\ub97c \uad6c\ud604\ud558\uae30 \uc704\ud574\uc11c\ub294 OpenCV\uc640 NumPy \ub77c\uc774\ube0c\ub7ec\ub9ac\uac00 \ud544\uc694\ud569\ub2c8\ub2e4. \uc544\ub798\uc758 \uba85\ub839\uc5b4\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub450 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc124\uce58\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:\n <\/p>\n

\n                pip install opencv-python numpy<\/code>\n            <\/pre>\n<\/section>\n
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\uc608\uc81c \ucf54\ub4dc<\/h2>\n
\n                \uc544\ub798\uc758 \ucf54\ub4dc\ub294 Optical Flow\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub450 \uc774\ubbf8\uc9c0 \uc0ac\uc774\uc758 \uc774\ub3d9\ub7c9\uc744 \uacc4\uc0b0\ud558\ub294 \uac04\ub2e8\ud55c \uc608\uc81c\uc785\ub2c8\ub2e4. \uc774 \uc608\uc81c\uc5d0\uc11c\ub294 \ube44\ub514\uc624 \ud30c\uc77c\uc5d0\uc11c \ud504\ub808\uc784\uc744 \uc77d\uc5b4
\n                Optical Flow\ub97c \uacc4\uc0b0\ud558\uc5ec \uadf8 \uacb0\uacfc\ub97c \uc2dc\uac01\ud654\ud569\ub2c8\ub2e4.\n            <\/p>\n
\n                \nimport cv2\nimport numpy as np\n\n# \ube44\ub514\uc624 \ud30c\uc77c \uacbd\ub85c\nvideo_path = 'video.mp4'\n\n# \ube44\ub514\uc624 \ucea1\ucc98 \uac1d\uccb4 \uc0dd\uc131\ncap = cv2.VideoCapture(video_path)\n\n# \uccab \ubc88\uc9f8 \ud504\ub808\uc784\uc744 \uc77d\uc5b4\ub4e4\uc784\nret, first_frame = cap.read()\ngray_first = cv2.cvtColor(first_frame, cv2.COLOR_BGR2GRAY)\n\n# \uccab \ubc88\uc9f8 \ud504\ub808\uc784\uc758 \ud2b9\uc9d5 \uc810 \ucd94\ucd9c\nfeatures = cv2.goodFeaturesToTrack(gray_first, maxCorners=100, qualityLevel=0.3, minDistance=7, blockSize=7)\n\nwhile True:\n    ret, next_frame = cap.read()\n    if not ret:\n        break\n\n    gray_next = cv2.cvtColor(next_frame, cv2.COLOR_BGR2GRAY)\n\n    # Optical Flow \uacc4\uc0b0\n    next_features, status, err = cv2.calcOpticalFlowPyrLK(gray_first, gray_next, features, None)\n\n    # \uc774\ub3d9 \ubc29\ud5a5\uacfc \ud06c\uae30\ub97c \uadf8\ub798\ud53d\uc73c\ub85c \ud45c\uc2dc\n    for i, (new, old) in enumerate(zip(next_features, features)):\n        a, b = new.ravel()\n        c, d = old.ravel()\n        cv2.line(next_frame, (a, b), (c, d), (0, 255, 0), 2)\n        cv2.circle(next_frame, (a, b), 5, (0, 0, 255), -1)\n\n    cv2.imshow('Optical Flow', next_frame)\n\n    # \uc5c5\ub370\uc774\ud2b8\n    gray_first = gray_next.copy()\n    features = next_features[status == 1]\n\n    if cv2.waitKey(30) & 0xFF == 27:  # ESC \ud0a4 \ub20c\ub9bc \uac10\uc9c0\n        break\n\ncap.release()\ncv2.destroyAllWindows()\n                <\/code>\n            <\/pre>\n<\/section>\n
\n
\ucf54\ub4dc \uc124\uba85<\/h2>\n
\n                \uc704 \uc608\uc81c\uc5d0\uc11c\ub294 \uac04\ub2e8\ud55c Optical Flow\ub97c \uacc4\uc0b0\ud558\ub294 \uacfc\uc815\uc744 \ubcf4\uc5ec \uc90d\ub2c8\ub2e4. \uac01 \uc8fc\uc694 \ub2e8\uacc4\uc5d0 \ub300\ud574 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.\n            <\/p>\n