{"id":128,"date":"2026-08-01T11:42:38","date_gmt":"2026-08-01T03:42:38","guid":{"rendered":"https:\/\/www.devfm.cn\/?p=128"},"modified":"2026-08-01T11:42:38","modified_gmt":"2026-08-01T03:42:38","slug":"cv2","status":"publish","type":"post","link":"https:\/\/www.devfm.cn\/?p=128","title":{"rendered":"cv2"},"content":{"rendered":"<pre><code class=\"language-python line-numbers\">import random\nimport cv2\n\n\nimg_file = '.\/learn\/demo-opencv\/demo.png'\nimg_file_result = '..\/demo.jpg'\n# \u5f69\u8272\nimg = cv2.imread(img_file, flags=cv2.IMREAD_COLOR)\n# cv2.line(img,(20,400),(400,20),(0, 0, 0),3)\ncv2.namedWindow(\"renho\", cv2.WINDOW_NORMAL)\nwhile True:\n    max_x = img.shape[0]\n    max_y = img.shape[1]\n    start_xy = (random.randint(0, max_y), random.randint(0, max_x))\n    end_xy = (random.randint(0, max_y), random.randint(0, max_x))\n    rgb = (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))\n\n    cv2.rectangle(img, start_xy, end_xy, rgb, 5)\n    cv2.imshow('renho', img)\n    if cv2.waitKey(100) == ord(\"q\"):\n        break\n    print('next')\n\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>import random import cv2 img_file = &#8216;.\/learn\/demo-openc&hellip; <a class=\"read-more-link\" href=\"https:\/\/www.devfm.cn\/?p=128\">Read More<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-128","post","type-post","status-publish","format-standard","hentry","category-python"],"_links":{"self":[{"href":"https:\/\/www.devfm.cn\/index.php?rest_route=\/wp\/v2\/posts\/128","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devfm.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devfm.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devfm.cn\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devfm.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=128"}],"version-history":[{"count":1,"href":"https:\/\/www.devfm.cn\/index.php?rest_route=\/wp\/v2\/posts\/128\/revisions"}],"predecessor-version":[{"id":129,"href":"https:\/\/www.devfm.cn\/index.php?rest_route=\/wp\/v2\/posts\/128\/revisions\/129"}],"wp:attachment":[{"href":"https:\/\/www.devfm.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devfm.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devfm.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}