OpenCV(Open Source Computer Vision Library)\ub294 \uc774\ubbf8\uc9c0 \ucc98\ub9ac \ubc0f \ucef4\ud4e8\ud130 \ube44\uc804 \uc791\uc5c5\uc744 \uc704\ud574 \uac1c\ubc1c\ub41c \ub77c\uc774\ube0c\ub7ec\ub9ac\ub85c, \ub2e4\uc591\ud55c \uae30\ub2a5\uacfc \uc54c\uace0\ub9ac\uc998\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \ubcf8 \uae00\uc5d0\uc11c\ub294 Optical Flow\ub97c \ud65c\uc6a9\ud55c \uc560\ub2c8\uba54\uc774\uc158 \ud6a8\uacfc\ub97c \ub9cc\ub4dc\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n
Optical Flow\ub294 \ube44\ub514\uc624 \uc2dc\ud000\uc2a4\uc5d0\uc11c \ud53d\uc140\uc774\ub098 \uac1d\uccb4\uc758 \uc6c0\uc9c1\uc784\uc744 \ucd94\uc815\ud558\ub294 \ubc29\ubc95\uc785\ub2c8\ub2e4. \uac04\ub2e8\ud788 \ub9d0\ud574, \ube44\ub514\uc624 \uac1c\ubcc4 \ud504\ub808\uc784 \uac04\uc758 \ubcc0\ud654\ub97c \ubd84\uc11d\ud558\uc5ec \ubb3c\uccb4\uc758 \uc774\ub3d9 \uacbd\ub85c\ub97c \ud30c\uc545\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. Optical Flow\ub294 \ubb3c\uccb4 \ucd94\uc801, \ubaa8\uc158 \ubd84\uc11d, \uc2a4\ud14c\ub808\uc624 \ube44\uc804 \ub4f1 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/p>\n
Optical Flow \uc54c\uace0\ub9ac\uc998\uc5d0\ub294 \uc5ec\ub7ec \uc885\ub958\uac00 \uc788\uc73c\uba70, \uadf8 \uc911\uc5d0\uc11c \ub300\ud45c\uc801\uc778 \uba87 \uac00\uc9c0 \uc54c\uace0\ub9ac\uc998\uc744 \uc18c\uac1c\ud569\ub2c8\ub2e4:<\/p>\n
OpenCV\ub294 Optical Flow\ub97c \uad6c\ud604\ud558\uae30 \uc704\ud55c \ub2e4\uc591\ud55c \ud568\uc218\uc640 \ud074\ub798\uc2a4\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc774 \uac15\uc88c\uc5d0\uc11c\ub294 \ud30c\uc774\uc36c OpenCV\ub97c \uc0ac\uc6a9\ud558\uc5ec Optical Flow\ub97c \uad6c\ud604\ud558\ub294 \ubc29\ubc95\uc744 \uc790\uc138\ud788 \uc124\uba85\ud558\uae30\ub85c \ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n
OpenCV\ub97c \uc0ac\uc6a9\ud558\uae30 \uc704\ud574\uc11c\ub294 \uba3c\uc800 OpenCV \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc124\uce58\ud574\uc57c \ud569\ub2c8\ub2e4. \uc544\ub798 \uba85\ub839\uc5b4\ub97c \ud1b5\ud574 OpenCV\ub97c \uc124\uce58\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n
pip install opencv-python opencv-python-headless<\/code><\/pre>\nOptical Flow\ub97c \ud65c\uc6a9\ud55c \uc560\ub2c8\uba54\uc774\uc158 \ud6a8\uacfc \uc608\uc81c<\/h3>\n
\ub2e4\uc74c\uc73c\ub85c Optical Flow\ub97c \ud65c\uc6a9\ud558\uc5ec \uc560\ub2c8\uba54\uc774\uc158 \ud6a8\uacfc\ub97c \ub9cc\ub4dc\ub294 \uac04\ub2e8\ud55c \uc608\uc81c\ub97c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774 \uc608\uc81c\uc5d0\uc11c\ub294 Optical Flow\ub97c \uc0ac\uc6a9\ud558\uc5ec \ube44\ub514\uc624\uc758 \uc774\ub3d9\ud558\ub294 \ubb3c\uccb4\ub97c \ucd94\uc801\ud558\uace0 \uadf8\uc5d0 \ub530\ub77c \uc560\ub2c8\uba54\uc774\uc158 \ud6a8\uacfc\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/p>\n
\ucf54\ub4dc \uc124\uba85<\/h4>\n
\uba3c\uc800 \ud544\uc694\ud55c \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c import\ud569\ub2c8\ub2e4. \uadf8 \ub2e4\uc74c, \ube44\ub514\uc624\ub97c \uc77d\uace0 Optical Flow\ub97c \uacc4\uc0b0\ud558\uc5ec \uacb0\uacfc\ub97c \uc2dc\uac01\ud654\ud558\ub294 \uc808\ucc28\ub97c \uc9c4\ud589\ud569\ub2c8\ub2e4:<\/p>\n
import cv2\nimport numpy as np\n\n# \ube44\ub514\uc624 \ud30c\uc77c \uacbd\ub85c\nvideo_path = 'input_video.mp4'\ncap = cv2.VideoCapture(video_path)\n\n# \uccab \ubc88\uc9f8 \ud504\ub808\uc784\uc744 \uc77d\uace0 \uadf8\ub808\uc774\uc2a4\ucf00\uc77c\ub85c \ubcc0\ud658\n_, first_frame = cap.read()\nprev_gray = cv2.cvtColor(first_frame, cv2.COLOR_BGR2GRAY)\n\n# Lucas-Kanade Optical Flow \ud30c\ub77c\ubbf8\ud130 \uc124\uc815\nlk_params = dict(winSize=(15, 15), maxLevel=2,\n criteria=(cv2.TERM_CRITERIA_EPS | cv2.TERM_CRITERIA_COUNT, 10, 0.03))\n\n# \uccab \ubc88\uc9f8 \ud504\ub808\uc784\uc5d0\uc11c \ud2b9\uc9d5 \uc810 \ucd94\ucd9c\nfeature_params = dict(maxCorners=100, qualityLevel=0.3, minDistance=7, blockSize=7)\np0 = cv2.goodFeaturesToTrack(prev_gray, mask=None, **feature_params)\n\n# \uc560\ub2c8\uba54\uc774\uc158 \ud6a8\uacfc\ub97c \uc704\ud55c \ub9c8\uc2a4\ud06c \ucd08\uae30\ud654\nmask = np.zeros_like(first_frame)\n\nwhile True:\n # \ube44\ub514\uc624 \ud504\ub808\uc784 \uc77d\uae30\n ret, frame = cap.read()\n if not ret:\n break\n\n # \ud604\uc7ac \ud504\ub808\uc784\uc744 \uadf8\ub808\uc774\uc2a4\ucf00\uc77c\ub85c \ubcc0\ud658\n gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)\n\n # Optical Flow \uacc4\uc0b0\n p1, st, err = cv2.calcOpticalFlowPyrLK(prev_gray, gray, p0, None, **lk_params)\n\n # \uc88b\uc740 \uc810 \uc120\ud0dd\n good_new = p1[st == 1]\n good_old = p0[st == 1]\n\n # \uc560\ub2c8\uba54\uc774\uc158 \ud6a8\uacfc\ub97c \uc704\ud55c \ub9c8\uc2a4\ud06c \uc5c5\ub370\uc774\ud2b8\n for i, (new, old) in enumerate(zip(good_new, good_old)):\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 # \uacb0\uacfc \ucd9c\ub825\n img = cv2.add(frame, mask)\n cv2.imshow('Optical Flow Animation', img)\n\n # \ud504\ub808\uc784 \uc5c5\ub370\uc774\ud2b8\n prev_gray = gray.copy()\n p0 = good_new.reshape(-1, 1, 2)\n\n # \uc885\ub8cc \uc870\uac74 (ESC \ud0a4)\n if cv2.waitKey(30) & 0xFF == 27:\n break\n\ncap.release()\ncv2.destroyAllWindows()<\/code><\/pre>\n\ucf54\ub4dc \uc124\uba85<\/h4>\n
\uc704 \ucf54\ub4dc\ub294 Optical Flow\ub97c \uc0ac\uc6a9\ud558\uc5ec \ube44\ub514\uc624 \ub0b4 \ubb3c\uccb4\uc758 \uc6c0\uc9c1\uc784\uc744 \uc2dc\uac01\uc801\uc73c\ub85c \ucd94\uc801\ud558\ub294 \uc804\ubc18\uc801\uc778 \ud750\ub984\uc744 \uad6c\uc131\ud569\ub2c8\ub2e4. \ub2e4\uc74c\uc740 \uc8fc\uc694 \ub2e8\uacc4\ubcc4 \ud30c\uc77c:<\/p>\n
\n- \ube44\ub514\uc624 \ud30c\uc77c \uc77d\uae30<\/strong>: \uc0ac\uc6a9\uc790\uac00 \uc81c\uacf5\ud55c \ube44\ub514\uc624 \ud30c\uc77c \uacbd\ub85c\ub97c \ud1b5\ud574 \ube44\ub514\uc624\ub97c \uc77d\uc2b5\ub2c8\ub2e4.<\/li>\n
- \uccab \ubc88\uc9f8 \ud504\ub808\uc784 \ucc98\ub9ac<\/strong>: \uccab \ubc88\uc9f8 \ud504\ub808\uc784\uc744 \uc77d\uace0, \uc774\ub97c \uadf8\ub808\uc774\uc2a4\ucf00\uc77c\ub85c \ubcc0\ud658\ud558\uc5ec \uc774\uc804 \ud504\ub808\uc784 \ub370\uc774\ud130\ub85c \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/li>\n
- \ud2b9\uc9d5 \uc810 \ucd94\ucd9c<\/strong>: \uccab \ubc88\uc9f8 \ud504\ub808\uc784\uc5d0\uc11c \ucd94\uc801\ud560 \ud2b9\uc9d5 \uc810\uc744 \ucd94\ucd9c\ud569\ub2c8\ub2e4.<\/li>\n
- Optical Flow \uacc4\uc0b0<\/strong>: cv2.calcOpticalFlowPyrLK \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc774\uc804 \ubc0f \ud604\uc7ac \ud504\ub808\uc784 \uac04\uc758 Optical Flow\ub97c \uacc4\uc0b0\ud569\ub2c8\ub2e4.<\/li>\n
- \uacb0\uacfc \ud45c\uc2dc<\/strong>: Optical Flow \uacb0\uacfc\ub97c \ud654\uba74\uc5d0 \ud45c\uc2dc\ud558\uace0, \ub9c8\uc2a4\ud06c\ub97c \uc774\uc6a9\ud558\uc5ec \uc560\ub2c8\uba54\uc774\uc158 \ud6a8\uacfc\ub97c \ud68d\ub4dd\ud569\ub2c8\ub2e4.<\/li>\n<\/ol>\n
\uacb0\uacfc<\/h3>\n
\uc704\uc758 \ucf54\ub4dc\ub97c \uc2e4\ud589\ud558\uba74 \uc785\ub825 \ube44\ub514\uc624\uc5d0\uc11c \uac10\uc9c0\ub41c \ubb3c\uccb4\uc758 \uc6c0\uc9c1\uc784\uc744 \ub530\ub77c \uc120\uacfc \uc810\uc774 \uadf8\ub824\uc9c0\ub294 \uc560\ub2c8\uba54\uc774\uc158\uc744 \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc744 \ud1b5\ud574 \ub2e4\uc591\ud55c \ubb3c\uccb4\uc758 \uc6c0\uc9c1\uc784\uc744 \ucd94\uc801\ud558\uace0 \uc2dc\uac01\uc801\uc73c\ub85c \ud45c\ud604\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
Optical Flow\uc758 \ud65c\uc6a9 \uc0ac\ub840<\/h2>\n
Optical Flow\ub294 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \ub9ce\uc774 \ud65c\uc6a9\ub420 \uc218 \uc788\uc73c\uba70, \uba87 \uac00\uc9c0 \ud65c\uc6a9 \uc0ac\ub840\ub97c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4:<\/p>\n
\n- \ube44\ub514\uc624 \uac10\uc2dc \uc2dc\uc2a4\ud15c<\/strong>: Optical Flow\ub294 \ube44\ub514\uc624 \uac10\uc2dc \ubc0f \ubcf4\uc548 \uc2dc\uc2a4\ud15c\uc5d0\uc11c \uc0ac\ub78c\uc774\ub098 \ucc28\ub7c9\uc758 \uc6c0\uc9c1\uc784\uc744 \ubaa8\ub2c8\ud130\ub9c1\ud558\ub294 \ub370 \ud6a8\uacfc\uc801\uc785\ub2c8\ub2e4.<\/li>\n
- \uc560\ub2c8\uba54\uc774\uc158 \ubc0f \uac8c\uc784 \uac1c\ubc1c<\/strong>: Optical Flow\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc560\ub2c8\uba54\uc774\uc158 \ud6a8\uacfc\ub97c natural\ud558\uac8c \ub9cc\ub4e4\uc5b4\uc90d\ub2c8\ub2e4.<\/li>\n
- \uc790\uc728 \uc8fc\ud589<\/strong>: \uc790\uc728 \uc8fc\ud589 \ucc28\ub7c9\uc5d0\uc120 \uc8fc\ubcc0 \ubb3c\uccb4\uc758 \uc6c0\uc9c1\uc784\uc744 \ubaa8\ub2c8\ud130\ub9c1\ud558\uc5ec \uacbd\ub85c\ub97c \uc124\uc815\ud558\ub294 \ub370 Optical Flow\uac00 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n<\/ul>\n
\uacb0\ub860<\/h2>\n
OpenCV\uc640 Optical Flow\ub294 \uc774\ubbf8\uc9c0 \ucc98\ub9ac \ubc0f \ucef4\ud4e8\ud130 \ube44\uc804 \ubd84\uc57c\uc5d0\uc11c \ub9e4\uc6b0 \uc720\uc6a9\ud55c \ub3c4\uad6c\uc785\ub2c8\ub2e4. \ubcf8 \uac15\uc88c\ub97c \ud1b5\ud574 Optical Flow\uc758 \uae30\ubcf8 \uac1c\ub150\uacfc \uc560\ub2c8\uba54\uc774\uc158 \ud6a8\uacfc\ub97c \uc2e4\ud604\ud558\ub294 \ubc29\ubc95\uc744 \uc774\ud574\ud558\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub418\uc5c8\uae30\ub97c \ubc14\ub78d\ub2c8\ub2e4. \uc55e\uc73c\ub85c\ub3c4 \uc774\ubbf8\uc9c0 \ucc98\ub9ac\uc640 \ucef4\ud4e8\ud130 \ube44\uc804 \ubd84\uc57c\uc5d0\uc11c \ub2e4\uc591\ud55c \uc2e4\ud5d8\uacfc \uc5f0\uad6c\ub97c \uc218\ud589\ud558\uae38 \uad8c\uc7a5\ud569\ub2c8\ub2e4.<\/p>\n
\ucd94\uac00\uc801\uc778 \ub9ac\uc18c\uc2a4<\/h2>\n
OpenCV\uc640 Optical Flow\uc5d0 \ub300\ud55c \ub354 \ub9ce\uc740 \uc815\ubcf4\ub97c \ucc3e\uace0 \uc2f6\ub2e4\uba74 \uc544\ub798\uc758 \ub9ac\uc18c\uc2a4\ub97c \ucc38\uace0\ud558\uc138\uc694:<\/p>\n