{"id":868,"date":"2025-10-16T11:03:42","date_gmt":"2025-10-16T02:03:42","guid":{"rendered":"http:\/\/practical.kr\/?p=868"},"modified":"2025-10-16T11:04:33","modified_gmt":"2025-10-16T02:04:33","slug":"opencv-%ea%b8%b0%eb%b0%98%ec%9c%bc%eb%a1%9c-%eb%86%8d%ea%b5%ac-%ec%bd%94%ed%8a%b8-%ec%b0%be%ea%b8%b0","status":"publish","type":"post","link":"http:\/\/practical.kr\/?p=868","title":{"rendered":"OpenCV \uae30\ubc18\uc73c\ub85c \ub18d\uad6c \ucf54\ud2b8 \ucc3e\uae30"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\ubc30\uacbd<\/h2>\n\n\n\n<p>\ub18d\uad6c \uacbd\uae30\ub97c \ubd84\uc11d\ud558\uc5ec \uc120\uc218\uc758 \uc6c0\uc9c1\uc784\uc744 \ucd94\ucd9c\ud558\uae30 \uc704\ud574\uc11c\ub294 \uc6b0\uc120 \ub18d\uad6c \ucf54\ud2b8\ub97c ROI(Region of Interest)\ub85c \uc124\uc815\ud574\uc57c \ud55c\ub2e4. \uadf8\ub798\uc57c\ub9cc \uad00\uc911\uacfc \uc120\uc218\ub4e4\uc744 \uad6c\ubd84\ud560 \uc218 \uc788\uae30 \ub54c\ubb38\uc774\ub2e4. AI \ubd84\uc11d \ubc29\ubc95\uc774 \ub9ce\uc740 GPU\ub97c \uc694\uad6c\ud558\uace0 \ub290\ub9b0 \uad00\uacc4\ub85c OpenCV\ub97c \uc774\uc6a9\ud558\uc5ec \uae30\ubcf8\uc801\uc778 ROI\ub97c \uad6c\ud604\ud558\ub294 \ubd80\ubd84\uc744 \ud14c\uc2a4\ud2b8\ud588\ub2e4.<\/p>\n\n\n\n<p>\uace0\uc815\ub41c \uce74\uba54\ub77c\uc5d0\uc11c\ub294 \uc815\ud574\uc9c4 ROI\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc9c0\ub9cc, \ubc29\uc1a1 \uc911\uacc4 \ud654\uba74\uc740 \uce74\uba54\ub77c \uc774\ub3d9\uc774 \ube48\ubc88\ud788 \uc77c\uc5b4\ub098\uace0 \uc120\uc218\ub4e4\uc774 \uc6c0\uc9c1\uc5ec \ucf54\ud2b8\uc758 \uc678\uacfd\uc120 \ub77c\uc778\uc744 \uac00\ub9ac\ub294 \uc0c1\ud669\uc774 \ub9e4\uc6b0 \ube48\ubc88\ud558\uac8c \ubc1c\uc0dd\ud558\uae30 \ub54c\ubb38\uc5d0 \uc27d\uc9c0\ub294 \uc54a\uc9c0\ub9cc, \ucf54\ud2b8 \ubc14\ub2e5\uc758 ROI\ub97c \uc124\uc815\ud558\ub294 \uac83\uc740 \uac00\uc7a5 \uae30\ubcf8\uc801\uc774\uace0 \uaf2d \ud544\uc694\ud55c \uae30\ub2a5\uc774\ub2e4.<\/p>\n\n\n\n<p>\uacb0\uacfc\uc801\uc73c\ub85c \ubaa8\ub4e0 \ud504\ub808\uc784\uc5d0\uc11c \uc644\uc804\ud788 \uc815\ud655\ud558\uc9c0\ub294 \uc54a\uc9c0\ub9cc \uc120\uc218\uc640 \uad00\uc911\uc758 \uad6c\ubd84\uc774 \uac00\ub2a5\ud560 \uc815\ub3c4\uc758 \uc131\ub2a5\uc774 \ub098\uc628\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ub3d9\uc601\uc0c1<\/h2>\n\n\n\n<p>\ub2e4\uc74c \ub9c1\ud06c\uc5d0\uc11c \uc2e4\uc81c \ub3d9\uc791\ud558\ub294 \ub3d9\uc601\uc0c1\uc744 \ubcfc\uc218\uc788\ub2e4.<br><a href=\"https:\/\/youtu.be\/0RT8Iq9kUzA\">https:\/\/youtu.be\/0RT8Iq9kUzA<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\uad6c\ud604 \ubc29\ubc95<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. \uadf8\ub808\uc774\uc2a4\ucf00\uc77c \ubcc0\ud658 \ubc0f \uc774\uc9c4\ud654<\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">image_gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)\n_, image_binary = cv2.threshold(image_gray, 127, 255, cv2.THRESH_BINARY)<\/pre>\n\n\n\n<p>\uc785\ub825 \uc774\ubbf8\uc9c0\ub97c \uadf8\ub808\uc774\uc2a4\ucf00\uc77c\ub85c \ubcc0\ud658\ud55c \ud6c4, 127\uc744 \uae30\uc900\uc73c\ub85c \uc774\uc9c4\ud654\ud55c\ub2e4. \uc774\ub294 \ud6c4\uc18d \ucc98\ub9ac \ub2e8\uacc4\uc758 \uae30\ubcf8\uc774 \ub41c\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. \ud770\uc0c9 \uc601\uc5ed \uac80\ucd9c<\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">white_mask = cv2.inRange(image_gray, 160, 255)<\/pre>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/velog.velcdn.com\/images\/rtlink\/post\/8df7accc-0eee-4ca3-b8e2-d90a1b34bd9f\/image.png\" alt=\"\"\/><\/figure>\n\n\n\n<p>\ub18d\uad6c \ucf54\ud2b8\uc758 \ub77c\uc778\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ud770\uc0c9\uc774\ubbc0\ub85c, 160~255 \ubc94\uc704\uc758 \ubc1d\uc740 \uc601\uc5ed\uc744 \ucd94\ucd9c\ud55c\ub2e4. \uc774 \ub9c8\uc2a4\ud06c\ub294 \ucf54\ud2b8 \ub77c\uc778 \uc601\uc5ed\uc744 \uac15\uc870\ud55c\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. \uc5e3\uc9c0 \uac80\ucd9c<\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">edges = cv2.Canny(image_binary, 50, 150, apertureSize=3)<\/pre>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/velog.velcdn.com\/images\/rtlink\/post\/2dcfe430-131c-474f-b3dd-b66eab8352b0\/image.png\" alt=\"\"\/><\/figure>\n\n\n\n<p>Canny \uc5e3\uc9c0 \uac80\ucd9c\uae30\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc774\uc9c4\ud654\ub41c \uc774\ubbf8\uc9c0\uc5d0\uc11c \uc5e3\uc9c0\ub97c \ucd94\ucd9c\ud55c\ub2e4. \uc784\uacc4\uac12\uc740 50\uacfc 150\uc73c\ub85c \uc124\uc815\ud588\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Hough Line Transform<\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">lines = cv2.HoughLinesP(edges, 1, np.pi\/180, threshold=80, \n                        minLineLength=50, maxLineGap=30)\n\nfor line in lines:\n    x1, y1, x2, y2 = line[0]\n    angle = np.abs(np.arctan2(y2 - y1, x2 - x1) * 180 \/ np.pi)\n\n    if angle &lt; 20 or angle > 160:\n        horizontal_lines.append((x1, y1, x2, y2))\n    elif 70 &lt; angle &lt; 110:\n        vertical_lines.append((x1, y1, x2, y2))<\/pre>\n\n\n\n<p>\ud655\ub960\uc801 Hough \ubcc0\ud658\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc9c1\uc120\uc744 \uac80\ucd9c\ud55c\ub2e4. \uac80\ucd9c\ub41c \ub77c\uc778\uc740 \uac01\ub3c4\ub97c \uae30\uc900\uc73c\ub85c \uc218\ud3c9\uc120\uacfc \uc218\uc9c1\uc120\uc73c\ub85c \ubd84\ub958\ud55c\ub2e4. \uc774\ub294 \ucf54\ud2b8\uc758 \uae30\ud558\ud559\uc801 \uad6c\uc870\ub97c \ud30c\uc545\ud558\ub294 \ub370 \ud65c\uc6a9\ub420 \uc218 \uc788\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. \ubaa8\ud3f4\ub85c\uc9c0 \uc5f0\uc0b0<\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">scale_factor = min(width, height) \/ 720.0\nkernel_size = max(3, int(3 * scale_factor))\nif kernel_size % 2 == 0:\n    kernel_size += 1\n\nkernel = np.ones((kernel_size, kernel_size), np.uint8)\ndilated = cv2.dilate(white_mask, kernel, iterations=1)\n\nerode_kernel_size = max(3, int(3 * scale_factor))\nif erode_kernel_size % 2 == 0:\n    erode_kernel_size += 1\nerode_kernel = np.ones((erode_kernel_size, erode_kernel_size), np.uint8)\neroded = cv2.erode(dilated, erode_kernel, iterations=1)<\/pre>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/velog.velcdn.com\/images\/rtlink\/post\/3c970151-0c4a-4d4a-909a-43416ef0fdd7\/image.png\" alt=\"\"\/><\/figure>\n\n\n\n<p>\ud574\uc0c1\ub3c4\uc5d0 \ub530\ub77c \ucee4\ub110 \ud06c\uae30\ub97c \ub3d9\uc801\uc73c\ub85c \uc870\uc815\ud55c\ub2e4. Dilation \ud6c4 Erosion\uc744 \uc218\ud589\ud558\uc5ec \uc791\uc740 \ub178\uc774\uc988\ub97c \uc81c\uac70\ud558\uace0 \ub04a\uc5b4\uc9c4 \ub77c\uc778\uc744 \uc5f0\uacb0\ud55c\ub2e4. 720p\ub97c \uae30\uc900\uc73c\ub85c \uc2a4\ucf00\uc77c \ud329\ud130\ub97c \uacc4\uc0b0\ud558\uba70, \ucee4\ub110 \ud06c\uae30\ub294 \ucd5c\uc18c 3\uc73c\ub85c \uc124\uc815\ud55c\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. \ucee8\ud22c\uc5b4 \uac80\ucd9c \ubc0f \ud544\ud130\ub9c1<\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">contours, _ = cv2.findContours(eroded, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)\n\ncourt_candidates = []\nfor cnt in contours:\n    area = cv2.contourArea(cnt)\n    if area > (width * height * 0.10):\n        x, y, w, h = cv2.boundingRect(cnt)\n        court_candidates.append((cnt, area, y))<\/pre>\n\n\n\n<p>\uc678\ubd80 \ucee8\ud22c\uc5b4\ub9cc \uac80\ucd9c\ud558\uc5ec \ud654\uba74\uc758 10% \uc774\uc0c1 \uba74\uc801\uc744 \ucc28\uc9c0\ud558\ub294 \ud6c4\ubcf4\ub4e4\ub9cc \uc120\ud0dd\ud55c\ub2e4. \uc774\ub294 \uc791\uc740 \ub178\uc774\uc988\ub97c \uc81c\uac70\ud558\uace0 \ucf54\ud2b8 \uc601\uc5ed\ub9cc \ucd94\ucd9c\ud558\uae30 \uc704\ud568\uc774\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">7. \ucd5c\uc801 \ucee8\ud22c\uc5b4 \uc120\ud0dd<\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">court_candidates.sort(key=lambda x: (x[2] + x[1] \/ 10000), reverse=True)\nbest_contour = court_candidates[0][0]<\/pre>\n\n\n\n<p>y \uc88c\ud45c\uc640 \uba74\uc801\uc744 \uc870\ud569\ud55c \uc810\uc218\ub85c \uc815\ub82c\ud558\uc5ec \ucd5c\uc801\uc758 \ucf54\ud2b8 \ud6c4\ubcf4\ub97c \uc120\ud0dd\ud55c\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \ucf54\ud2b8\ub294 \ud654\uba74 \ud558\ub2e8\uc5d0 \uc704\uce58\ud558\uba70 \ud070 \uba74\uc801\uc744 \ucc28\uc9c0\ud55c\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">8. Convex Hull<\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">convex_hull = cv2.convexHull(best_contour)<\/pre>\n\n\n\n<p>\uc120\ud0dd\ub41c \ucee8\ud22c\uc5b4\ub97c \ubcfc\ub85d \ub2e4\uac01\ud615(Convex Hull)\uc73c\ub85c \ubcc0\ud658\ud55c\ub2e4. \uc774\ub294 \uc548\ucabd\uc73c\ub85c \uaebe\uc778 \ubd80\ubd84\uc744 \uc81c\uac70\ud558\uc5ec \ucf54\ud2b8\uc758 \uc678\uacfd\uc120\uc744 \ub2e8\uc21c\ud654\ud55c\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">9. \ud3f4\ub9ac\uace4 \uadfc\uc0ac\ud654<\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">epsilon = 0.01 * cv2.arcLength(convex_hull, True)\napprox_polygon = cv2.approxPolyDP(convex_hull, epsilon, True)<\/pre>\n\n\n\n<p>Douglas-Peucker \uc54c\uace0\ub9ac\uc998\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud3f4\ub9ac\uace4\uc744 \uadfc\uc0ac\ud654\ud55c\ub2e4. epsilon \uac12\uc740 \ucee8\ud22c\uc5b4 \ub458\ub808\uc758 1%\ub85c \uc124\uc815\ud558\uc5ec \ub2e8\uc21c\ud654 \uc815\ub3c4\ub97c \uc870\uc808\ud55c\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/velog.velcdn.com\/images\/rtlink\/post\/4ad558ea-e49c-495f-9238-e160687968d6\/image.png\" alt=\"\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\ud30c\ub77c\ubbf8\ud130 \ud29c\ub2dd \ud3ec\uc778\ud2b8<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\uc774\uc9c4\ud654 \uc784\uacc4\uac12<\/strong>: 127 (\ubc1d\uae30 \uae30\uc900)<\/li>\n\n\n\n<li><strong>\ud770\uc0c9 \uac80\ucd9c \ubc94\uc704<\/strong>: 160~255<\/li>\n\n\n\n<li><strong>Canny \uc5e3\uc9c0 \uc784\uacc4\uac12<\/strong>: 50, 150<\/li>\n\n\n\n<li><strong>Hough \ubcc0\ud658 \ud30c\ub77c\ubbf8\ud130<\/strong>: threshold=80, minLineLength=50, maxLineGap=30<\/li>\n\n\n\n<li><strong>\uac01\ub3c4 \ubd84\ub958<\/strong>: \uc218\ud3c9\uc120(&lt; 20\u00b0 \ub610\ub294 &gt; 160\u00b0), \uc218\uc9c1\uc120(70\u00b0 ~ 110\u00b0)<\/li>\n\n\n\n<li><strong>\ucee4\ub110 \ud06c\uae30<\/strong>: \ud574\uc0c1\ub3c4\uc5d0 \ube44\ub840, \ucd5c\uc18c 3&#215;3<\/li>\n\n\n\n<li><strong>\ubaa8\ud3f4\ub85c\uc9c0 \ubc18\ubcf5<\/strong>: dilation 1\ud68c, erosion 1\ud68c<\/li>\n\n\n\n<li><strong>\uba74\uc801 \uc784\uacc4\uac12<\/strong>: \uc804\uccb4 \ud654\uba74\uc758 10%<\/li>\n\n\n\n<li><strong>\ud3f4\ub9ac\uace4 \uadfc\uc0ac\ud654 epsilon<\/strong>: \ub458\ub808\uc758 1%<\/li>\n\n\n\n<li><strong>\ud655\ub300 \ube44\uc728<\/strong>: 1.05 (5% \ud655\ub300)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\uc81c\ud55c\uc0ac\ud56d<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ucf54\ud2b8 \ub77c\uc778\uc774 \ud770\uc0c9\uc774\ub77c\ub294 \uac00\uc815\uc5d0 \uc758\uc874<\/li>\n\n\n\n<li>\uc870\uba85\uc774 \uc5b4\ub461\uac70\ub098 \ucf54\ud2b8 \uc0c9\uc0c1\uc774 \ud2b9\uc774\ud55c \uacbd\uc6b0 \uc131\ub2a5 \uc800\ud558 \uac00\ub2a5<\/li>\n\n\n\n<li>\uce74\uba54\ub77c \uac01\ub3c4\uac00 \uadf9\ub2e8\uc801\uc778 \uacbd\uc6b0 \uac80\ucd9c \uc2e4\ud328 \uac00\ub2a5<\/li>\n\n\n\n<li>\ud504\ub808\uc784\ub9c8\ub2e4 \uc548\uc815\uc131\uc740 \ubcf4\uc7a5\ub418\uc9c0 \uc54a\uc73c\ub098, \ub300\ubd80\ubd84\uc758 \uacbd\uc6b0 \uc720\ud6a8\ud55c ROI \uc81c\uacf5<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\uacb0\ub860<\/h2>\n\n\n\n<p>OpenCV\uc758 \uae30\ubcf8 \uc774\ubbf8\uc9c0 \ucc98\ub9ac \uae30\ubc95\uc744 \uc870\ud569\ud558\uc5ec \ub18d\uad6c \ucf54\ud2b8\ub97c \uac80\ucd9c\ud560 \uc218 \uc788\ub2e4. GPU \uc5c6\uc774\ub3c4 \uc2e4\uc2dc\uac04\uc5d0 \uac00\uae4c\uc6b4 \uc18d\ub3c4\ub85c \ub3d9\uc791\ud558\uba70, \ubc29\uc1a1 \uc911\uacc4 \uc601\uc0c1\uc5d0\uc11c \ub3d9\uc801\uc73c\ub85c \ubcc0\ud558\ub294 \uce74\uba54\ub77c \uac01\ub3c4\uc5d0\ub3c4 \ub300\uc751 \uac00\ub2a5\ud558\ub2e4. \uc644\ubcbd\ud55c \uc815\ud655\ub3c4\ub97c \ubcf4\uc7a5\ud558\uc9c0\ub294 \uc54a\uc9c0\ub9cc, \uc120\uc218\uc640 \uad00\uc911\uc744 \uad6c\ubd84\ud558\ub294 \uc6a9\ub3c4\ub85c\ub294 \ucda9\ubd84\ud55c \uc131\ub2a5\uc744 \ubcf4\uc778\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ubc30\uacbd \ub18d\uad6c \uacbd\uae30\ub97c \ubd84\uc11d\ud558\uc5ec \uc120\uc218\uc758 \uc6c0\uc9c1\uc784\uc744 \ucd94\ucd9c\ud558\uae30 \uc704\ud574\uc11c\ub294 \uc6b0\uc120 \ub18d\uad6c \ucf54\ud2b8\ub97c ROI(Region of Interest)\ub85c \uc124\uc815\ud574\uc57c \ud55c\ub2e4. \uadf8\ub798\uc57c\ub9cc \uad00\uc911\uacfc \uc120\uc218\ub4e4\uc744 \uad6c\ubd84\ud560 \uc218 \uc788\uae30 \ub54c\ubb38\uc774\ub2e4. AI \ubd84\uc11d \ubc29\ubc95\uc774 \ub9ce\uc740 GPU\ub97c \uc694\uad6c\ud558\uace0 \ub290\ub9b0 \uad00\uacc4\ub85c OpenCV\ub97c \uc774\uc6a9\ud558\uc5ec \uae30\ubcf8\uc801\uc778 ROI\ub97c \uad6c\ud604\ud558\ub294 \ubd80\ubd84\uc744 \ud14c\uc2a4\ud2b8\ud588\ub2e4. \uace0\uc815\ub41c \uce74\uba54\ub77c\uc5d0\uc11c\ub294 \uc815\ud574\uc9c4 ROI\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc9c0\ub9cc, \ubc29\uc1a1 \uc911\uacc4 \ud654\uba74\uc740 \uce74\uba54\ub77c \uc774\ub3d9\uc774 \ube48\ubc88\ud788 \uc77c\uc5b4\ub098\uace0 \uc120\uc218\ub4e4\uc774 \uc6c0\uc9c1\uc5ec \ucf54\ud2b8\uc758<\/p>\n<div class=\"more-link\">\n\t\t\t\t <a href=\"http:\/\/practical.kr\/?p=868\" class=\"link-btn theme-btn\"><span>Read More <\/span> <i class=\"fa fa-caret-right\"><\/i><\/a>\n\t\t\t<\/div>\n","protected":false},"author":1,"featured_media":869,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[21],"tags":[],"class_list":["post-868","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-opencv"],"jetpack_featured_media_url":"http:\/\/practical.kr\/wp-content\/uploads\/2025\/10\/\uc2a4\ud06c\ub9b0\uc0f7-2025-10-16-11.02.47.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/practical.kr\/index.php?rest_route=\/wp\/v2\/posts\/868","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/practical.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/practical.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/practical.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/practical.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=868"}],"version-history":[{"count":2,"href":"http:\/\/practical.kr\/index.php?rest_route=\/wp\/v2\/posts\/868\/revisions"}],"predecessor-version":[{"id":871,"href":"http:\/\/practical.kr\/index.php?rest_route=\/wp\/v2\/posts\/868\/revisions\/871"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/practical.kr\/index.php?rest_route=\/wp\/v2\/media\/869"}],"wp:attachment":[{"href":"http:\/\/practical.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=868"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/practical.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=868"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/practical.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}