{"id":38724,"date":"2024-11-02T00:56:35","date_gmt":"2024-11-02T00:56:35","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=38724"},"modified":"2024-11-26T06:43:31","modified_gmt":"2024-11-26T06:43:31","slug":"opencv-%ea%b0%95%ec%a2%8c-%eb%8f%99%ec%9e%91-%ec%9d%b8%ec%8b%9d-%ea%b8%b0%ec%b4%88-frame-difference-background-subtraction","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/38724\/","title":{"rendered":"OpenCV \uac15\uc88c, \ub3d9\uc791 \uc778\uc2dd \uae30\ucd08 (Frame Difference, Background Subtraction)"},"content":{"rendered":"

<\/p>\n

\uae00\ub85c\ubc8c \ubc94\uc704\uc5d0\uc11c\uc758 \uc601\uc0c1 \ucc98\ub9ac \uae30\uc220\uc740 \ub2e4\uc591\ud55c \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0 \ud65c\uc6a9\ub418\uace0 \uc788\uc2b5\ub2c8\ub2e4. \ud2b9\ud788, \ubcf4\uc548 \uc2dc\uc2a4\ud15c, \uc790\ub3d9 \uc8fc\ucc28 \uc2dc\uc2a4\ud15c, \uc2a4\ud3ec\uce20 \ubd84\uc11d \ub4f1 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \ub3d9\uc791 \uc778\uc2dd \uae30\uc220\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. \uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 OpenCV \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0ac\uc6a9\ud558\uc5ec \uae30\ubcf8\uc801\uc778 \ub3d9\uc791 \uc778\uc2dd \uae30\ubc95\uc778 Frame Difference\uc640 Background Subtraction\uc5d0 \ub300\ud574 \uc790\uc138\ud788 \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n

1. OpenCV \uc18c\uac1c<\/h2>\n

OpenCV(Open Source Computer Vision Library)<\/strong>\ub294 \uc8fc\ub85c \uc2e4\uc2dc\uac04 \ucef4\ud4e8\ud130 \ube44\uc804\uc744 \uc704\ud55c \ub77c\uc774\ube0c\ub7ec\ub9ac\uc785\ub2c8\ub2e4. C++, Python \ubc0f Java\uc640 \uac19\uc740 \ub2e4\uc591\ud55c \ud504\ub85c\uadf8\ub798\ubc0d \uc5b8\uc5b4\ub97c \uc9c0\uc6d0\ud558\uba70, \uc774\ubbf8\uc9c0 \ubc0f \ube44\ub514\uc624 \ucc98\ub9ac, \uac1d\uccb4 \uc778\uc2dd, \ub3d9\uc791 \uc778\uc2dd \ub4f1 \ub2e4\uc591\ud55c \uae30\ub2a5\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\n

1.1 OpenCV \uc124\uce58\ud558\uae30<\/h3>\n

Python\uc5d0\uc11c 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. Python pip \ud328\ud0a4\uc9c0 \uad00\ub9ac\uc790\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc27d\uac8c \uc124\uce58\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

pip install opencv-python<\/code><\/pre>\n
2. \ub3d9\uc791 \uc778\uc2dd \uac1c\uc694<\/h2>\n
\ub3d9\uc791 \uc778\uc2dd\uc740 \uc77c\uc815 \uc2dc\uac04 \ub3d9\uc548\uc758 \uc601\uc0c1 \ud750\ub984\uc744 \ubd84\uc11d\ud558\uc5ec \uc2dc\uac01\uc801 \ud328\ud134\uc774\ub098 \ud589\ub3d9\uc744 \uc2dd\ubcc4\ud558\ub294 \uae30\uc220\uc785\ub2c8\ub2e4. \uc774 \uac15\uc88c\uc5d0\uc11c\ub294 \ub450 \uac00\uc9c0 \uae30\ubc95\uc778 Frame Difference\uc640 Background Subtraction\uc744 \ub2e4\ub8f9\ub2c8\ub2e4.<\/p>\n
3. Frame Difference<\/h2>\n
Frame Difference\ub294 \uc5f0\uc18d\ub41c \ub450 \ud504\ub808\uc784 \uac04\uc758 \ucc28\uc774\ub97c \uacc4\uc0b0\ud558\uc5ec \ub3d9\uc791\uc744 \uc778\uc2dd\ud558\ub294 \uac04\ub2e8\ud55c \uae30\ubc95\uc785\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc740 \uc8fc\ub85c \uace0\uc815\ub41c \ubc30\uacbd\uc5d0\uc11c \uc6c0\uc9c1\uc774\ub294 \ubb3c\uccb4\ub97c \uc778\uc2dd\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/p>\n
3.1 Frame Difference \uc6d0\ub9ac<\/h3>\n
\uc774 \ubc29\ubc95\uc740 \ud604\uc7ac \ud504\ub808\uc784\uacfc \uc774\uc804 \ud504\ub808\uc784\uc744 \ube44\uad50\ud558\uc5ec \ucc28\uc774\uac00 \uc788\ub294 \uc601\uc5ed\uc744 \ucc3e\uc544\ub0b4\ub294 \ubc29\uc2dd\uc785\ub2c8\ub2e4. \ud070 \ucc28\uc774\uac00 \uc788\ub294 \ud53d\uc140\ub4e4\uc740 \uc6c0\uc9c1\uc774\ub294 \ubb3c\uccb4\ub85c \uac04\uc8fc\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
3.2 Frame Difference \uc608\uc81c \ucf54\ub4dc<\/h3>\n
\uc544\ub798\ub294 Frame Difference\ub97c \uc774\uc6a9\ud55c \ub3d9\uc791 \uc778\uc2dd\uc758 \uc608\uc81c \ucf54\ub4dc\uc785\ub2c8\ub2e4.<\/p>\n
\nimport cv2\n\n# \ube44\ub514\uc624 \ucea1\ucc98 \uac1d\uccb4 \uc0dd\uc131\ncap = cv2.VideoCapture(0)\n\n# \uccab \ubc88\uc9f8 \ud504\ub808\uc784 \uc77d\uae30\nret, prev_frame = cap.read()\nprev_frame = cv2.cvtColor(prev_frame, cv2.COLOR_BGR2GRAY)\n\nwhile True:\n    # \ud604\uc7ac \ud504\ub808\uc784 \uc77d\uae30\n    ret, current_frame = cap.read()\n    current_frame_gray = cv2.cvtColor(current_frame, cv2.COLOR_BGR2GRAY)\n\n    # Frame Difference \uacc4\uc0b0\n    frame_diff = cv2.absdiff(prev_frame, current_frame_gray)\n    _, thresh = cv2.threshold(frame_diff, 30, 255, cv2.THRESH_BINARY)\n\n    # \ub3d9\uc791 \uc778\uc2dd \uacb0\uacfc \ucd9c\ub825\n    cv2.imshow('Frame Difference', thresh)\n\n    # \uc774\uc804 \ud504\ub808\uc784\uc744 \ud604\uc7ac \ud504\ub808\uc784\uc73c\ub85c \uc5c5\ub370\uc774\ud2b8\n    prev_frame = current_frame_gray.copy()\n\n    # 'q'\ub97c \ub20c\ub7ec \ud504\ub85c\uadf8\ub7a8 \uc885\ub8cc\n    if cv2.waitKey(1) == ord('q'):\n        break\n\ncap.release()\ncv2.destroyAllWindows()\n    <\/code><\/pre>\n
\uc774 \ucf54\ub4dc\ub294 \uc6f9\ucea0\uc5d0\uc11c \ube44\ub514\uc624\ub97c \ucea1\ucc98\ud558\uc5ec \uc5f0\uc18d\uc801\uc778 \ud504\ub808\uc784 \uac04\uc758 \ucc28\uc774\ub97c \uacc4\uc0b0\ud558\uace0, \ucc28\uc774\uac00 \uc788\ub294 \uc601\uc5ed\uc744 \uc774\uc9c4\ud654\ud558\uc5ec \ubcf4\uc5ec\uc90d\ub2c8\ub2e4. \ub3d9\uc791\uc774 \uac10\uc9c0\ub418\uba74 \ud770\uc0c9\uc73c\ub85c \ud45c\uc2dc\ub418\uba70, \uc0ac\uc6a9\uc790\uac00 ‘q’ \ud0a4\ub97c \ub204\ub974\uba74 \uc885\ub8cc\ub429\ub2c8\ub2e4.<\/p>\n
4. Background Subtraction<\/h2>\n
Background Subtraction\uc740 \ub3d9\uc791 \uc778\uc2dd\uc744 \uc704\ud55c \ub610 \ub2e4\ub978 \uc778\uae30 \uc788\ub294 \uae30\ubc95\uc785\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc740 \uc815\uc801\uc778 \ubc30\uacbd\uacfc \ub3d9\uc801\uc778 \uac1d\uccb4\ub97c \ubd84\ub9ac\ud558\uc5ec \ub3d9\uc791\uc744 \uc778\uc2dd\ud569\ub2c8\ub2e4. \uc774 \uacfc\uc815\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ub450 \ub2e8\uacc4\ub85c \uc9c4\ud589\ub429\ub2c8\ub2e4: \ubc30\uacbd \ubaa8\ub378\ub9c1 \ubc0f \ubc30\uacbd\uacfc\uc758 \ucc28\uc774 \uacc4\uc0b0\uc785\ub2c8\ub2e4.<\/p>\n
4.1 Background Subtraction \uc6d0\ub9ac<\/h3>\n
\uc774 \uae30\ubc95\uc740 \ub3d9\uc601\uc0c1 \uc2a4\ud2b8\ub9bcs\uc758 \ubc30\uacbd\uc744 \ucd94\uc815\ud558\uace0, \uc774\ub97c \uae30\uc900\uc73c\ub85c \ubb3c\uccb4\uc758 \uc6c0\uc9c1\uc784\uc744 \ucd94\uc801\ud569\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c cv2.createBackgroundSubtractorMOG2()<\/code>\uc640 \uac19\uc740 \uba54\uc18c\ub4dc\ub97c \uc0ac\uc6a9\ud558\uc5ec \ubc30\uacbd \ubaa8\ub378\uc744 \uc0dd\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
4.2 Background Subtraction \uc608\uc81c \ucf54\ub4dc<\/h3>\n
\uc544\ub798\ub294 Background Subtraction\uc744 \uc0ac\uc6a9\ud55c \uc608\uc81c \ucf54\ub4dc\uc785\ub2c8\ub2e4.<\/p>\n
\nimport cv2\n\n# Background Subtractor \uac1d\uccb4 \uc0dd\uc131\nbackSub = cv2.createBackgroundSubtractorMOG2()\n\n# \ube44\ub514\uc624 \ucea1\ucc98 \uac1d\uccb4 \uc0dd\uc131\ncap = cv2.VideoCapture(0)\n\nwhile True:\n    # \ud604\uc7ac \ud504\ub808\uc784 \uc77d\uae30\n    ret, frame = cap.read()\n    if not ret:\n        break\n\n    # Background Subtraction \uc218\ud589\n    fg_mask = backSub.apply(frame)\n\n    # \ub3d9\uc791 \uc778\uc2dd \uacb0\uacfc \ucd9c\ub825\n    cv2.imshow('Foreground Mask', fg_mask)\n\n    # 'q'\ub97c \ub20c\ub7ec \ud504\ub85c\uadf8\ub7a8 \uc885\ub8cc\n    if cv2.waitKey(1) == ord('q'):\n        break\n\ncap.release()\ncv2.destroyAllWindows()\n    <\/code><\/pre>\n
\uc774 \ucf54\ub4dc\ub294 Background Subtractor\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub3d9\uc791 \uc778\uc2dd \uacb0\uacfc\ub97c \ucd9c\ub825\ud569\ub2c8\ub2e4. \ub3d9\uc791\uc774 \uac10\uc9c0\ub418\uba74 \uc804\uacbd \ub9c8\uc2a4\ud06c\uac00 \uc5c5\ub370\uc774\ud2b8\ub418\uc5b4 \ub098\ud0c0\ub0a9\ub2c8\ub2e4.<\/p>\n
5. \uacb0\ub860<\/h2>\n
\uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 OpenCV\ub97c \uc774\uc6a9\ud55c \ub3d9\uc791 \uc778\uc2dd\uc758 \uae30\ucd08 \uae30\ubc95\uc778 Frame Difference\uc640 Background Subtraction\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\uc558\uc2b5\ub2c8\ub2e4. \ub450 \uae30\ubc95 \ubaa8\ub450 \ube44\uad50\uc801 \uac04\ub2e8\ud558\uba74\uc11c\ub3c4 \uac15\ub825\ud55c \uae30\ub2a5\uc744 \uac00\uc9c0\uace0 \uc788\uc5b4, \uc2e4\uc2dc\uac04 \uc601\uc0c1 \ucc98\ub9ac \ubc0f \ub3d9\uc791 \uc778\uc2dd\uc5d0 \ub110\ub9ac \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc774 \uae30\ucd08 \uac1c\ub150\uc744 \ubc14\ud0d5\uc73c\ub85c \ub2e4\uc591\ud55c \uc751\uc6a9 \ud504\ub85c\uadf8\ub7a8\uc5d0 \ud65c\uc6a9\ud574 \ubcf4\uc2dc\uae38 \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n
6. \ucc38\uace0\uc790\ub8cc<\/h2>\n