{"id":210,"date":"2021-02-23T23:36:00","date_gmt":"2021-02-23T15:36:00","guid":{"rendered":"http:\/\/madapapa.com\/wordpress\/?p=210"},"modified":"2021-02-23T23:39:19","modified_gmt":"2021-02-23T15:39:19","slug":"learning-opencv-day-one","status":"publish","type":"post","link":"http:\/\/madapapa.com\/wordpress\/?p=210","title":{"rendered":"Learning OpenCV Day one"},"content":{"rendered":"<p>\u8fd0\u884cdemo\u6587\u4ef6\uff1a<\/p>\n<pre><code class=\"language-text\">import cv2\nimage = cv2.imread(&#39;MyPic.png&#39;)\ncv2.imwrite(&#39;MyPic.jpg&#39;, image)\n<\/code><\/pre>\n<p>\u51fa\u73b0\u5982\u4e0b\u9519\u8bef<\/p>\n<pre><code class=\"language-text\">cv2.error: OpenCV(4.5.1) \/tmp\/opencv-20210108-6455-1src644\/opencv-4.5.1\/modules\/imgcodecs\/src\/loadsave.cpp:753: error: (-215:Assertion failed) !_img.empty() in function &#39;imwrite&#39;\n<\/code><\/pre>\n<p>\u4fee\u6539mypic.png\u4e3a\u7edd\u5bf9\u8def\u5f84\uff08\/Users\/m&#8230;\/Study\/learningOC\/MyPic.png\uff09\uff0c\u4fee\u590d\u5b8c\u6210\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd0\u884cdemo\u6587\u4ef6\uff1a import cv2 image = cv2.imread(&#39;MyPic.png&#39;) cv2.imwrite(&#39;MyPic.jpg&#39;, image) \u51fa\u73b0\u5982\u4e0b\u9519\u8bef cv2.error: OpenCV(4.5.1) \/tmp\/opencv-20210108-6455-1src644\/opencv-4.5.1\/modules\/imgcodecs\/src\/loadsave.cpp:753: error: (-215:Assertion failed) !_img.empty() in function &#39;imwrite&#39; \u4fee\u6539mypic.png\u4e3a\u7edd\u5bf9\u8def\u5f84\uff08\/Users\/m&#8230;\/Study\/learningOC\/MyPic.png\uff09\uff0c\u4fee\u590d\u5b8c\u6210\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categories":[1],"tags":[31],"class_list":["post-210","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-opencv"],"_links":{"self":[{"href":"http:\/\/madapapa.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/210","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/madapapa.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/madapapa.com\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/madapapa.com\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/madapapa.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=210"}],"version-history":[{"count":1,"href":"http:\/\/madapapa.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/210\/revisions"}],"predecessor-version":[{"id":211,"href":"http:\/\/madapapa.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/210\/revisions\/211"}],"wp:attachment":[{"href":"http:\/\/madapapa.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=210"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/madapapa.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=210"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/madapapa.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=210"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}