{"id":971,"date":"2020-06-29T13:52:09","date_gmt":"2020-06-29T05:52:09","guid":{"rendered":"http:\/\/blog.5danyuan.com\/?p=971"},"modified":"2020-06-29T13:52:09","modified_gmt":"2020-06-29T05:52:09","slug":"%e5%9b%be%e5%83%8f%e9%98%88%e5%80%bc%e5%a4%84%e7%90%86cv2-threshold%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/blog.5danyuan.com\/?p=971","title":{"rendered":"\u56fe\u50cf\u9608\u503c\u5904\u7406cv2.threshold\u51fd\u6570"},"content":{"rendered":"\n<p>\u6700\u8fd1\u505a\u56fe\u7247\u5904\u7406\u65f6\uff0c\u770b\u522b\u4eba\u4ee3\u7801\u4f7f\u7528\u4e86 opencv \u7684\u9608\u503c\u51fd\u6570 threshold\uff0c\u7f51\u4e0a\u641c\u7d22\u4e86\u4e0b\u8fd9\u4e2a\u51fd\u6570\u7684\u4f7f\u7528\u8bf4\u660e\u3002<\/p>\n\n\n\n<p>\u7b80\u5355\u5730\u8bb2\uff0c\u6240\u8c13\u9608\u503c\u5c31\u662f\u8bf4\u5982\u679c\u5f85\u5904\u7406\u7684\u6570\u636e\u8fbe\u5230\u4e86\u67d0\u4e2a\u4e34\u754c\u70b9\u540e\uff0c\u5982\u4f55\u5904\u7406\u7684\u65b9\u5f0f\u3002<\/p>\n\n\n\n<p>python\u91cc\u5b9a\u4e49\u5982\u4e0b\uff1a<br><strong>cv2.threshold(src, thresh, maxval, type[, dst]) <\/strong>\u2192 retval, dst<\/p>\n\n\n\n<p>\u53c2\u6570\u8bf4\u660e\u5982\u4e0b\uff1a<br>src\uff1a\u6e90\u56fe\u7247<br>thresh\uff1a\u9608\u503c\uff0c\u53d6\u503c\u8303\u56f40\uff5e255<br>maxval\uff1a\u586b\u5145\u503c\uff0c\u53d6\u503c\u8303\u56f40\uff5e255<br>type\uff1a\u9608\u503c\u7c7b\u578b\uff0c\u8868\u793a\u7684\u662f\u8fd9\u91cc\u5212\u5206\u7684\u65f6\u5019\u4f7f\u7528\u7684\u662f\u4ec0\u4e48\u7c7b\u578b\u7684\u7b97\u6cd5\uff0c\u5e38\u7528\u503c\u4e3a0\uff08cv2.THRESH_BINARY\uff09<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"733\" src=\"https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/type-1024x733.png\" alt=\"\" class=\"wp-image-972\" srcset=\"https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/type-1024x733.png 1024w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/type-300x215.png 300w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/type-768x550.png 768w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/type.png 1031w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\u56fe\u4e2d\uff08x,y\uff09\u8868\u793a\u7684\u662f\u56fe\u50cf\u4e2d\u7684\u5750\u6807<br>INV \u8868\u793a\u7684\u662f\u53d6\u53cd<br>\u4e00\u822c\u7684\uff08BINARY\uff09\u6548\u679c\u662f\uff1a<br>        \u5c06\u4e00\u4e2a\u7070\u8272\u7684\u56fe\u7247\uff0c\u53d8\u6210\u8981\u4e48\u662f\u767d\u8272\u8981\u4e48\u5c31\u662f\u9ed1\u8272\u3002\uff08\u5927\u4e8e\u89c4\u5b9athresh\u503c\u5c31\u662f\u8bbe\u7f6e\u7684\u6700\u5927\u503c\uff08\u5e38\u4e3a255\uff0c\u4e5f\u5c31\u662f\u767d\u8272\uff09\uff09<\/p>\n\n\n\n<p>\u4e0b\u9762\u662f\u51e0\u4e2a\u65b9\u5f0f\u7684\u6548\u679c\u56fe<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"362\" src=\"https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t0-1024x362.jpg\" alt=\"\" class=\"wp-image-973\" srcset=\"https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t0-1024x362.jpg 1024w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t0-300x106.jpg 300w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t0-768x271.jpg 768w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t0.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>THRESH_BINARY<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"362\" src=\"https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t1-1024x362.jpg\" alt=\"\" class=\"wp-image-974\" srcset=\"https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t1-1024x362.jpg 1024w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t1-300x106.jpg 300w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t1-768x271.jpg 768w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t1.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>THRESH_BINARY_INV<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"335\" src=\"https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t2-1024x335.jpg\" alt=\"\" class=\"wp-image-975\" srcset=\"https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t2-1024x335.jpg 1024w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t2-300x98.jpg 300w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t2-768x251.jpg 768w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t2.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>THRESH_TRUNC<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"362\" src=\"https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t3-1024x362.jpg\" alt=\"\" class=\"wp-image-976\" srcset=\"https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t3-1024x362.jpg 1024w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t3-300x106.jpg 300w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t3-768x271.jpg 768w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t3.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>THRESH_TOZERO<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"338\" src=\"https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t4-1024x338.jpg\" alt=\"\" class=\"wp-image-977\" srcset=\"https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t4-1024x338.jpg 1024w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t4-300x99.jpg 300w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t4-768x253.jpg 768w, https:\/\/blog.5danyuan.com\/wp-content\/uploads\/2020\/06\/t4.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>THRESH_TOZERO_INV<\/figcaption><\/figure>\n\n\n\n<p>\u5b9e\u9645\u64cd\u4f5c\u4e0a\u6765\u8bf4\uff0c\u5efa\u8bae\u4f20\u5165\u5df2\u7ecf\u7070\u5ea6\u5904\u7406\u540e\u7684\u56fe\u50cf\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1\u505a\u56fe\u7247\u5904\u7406\u65f6\uff0c\u770b\u522b\u4eba\u4ee3\u7801\u4f7f\u7528\u4e86 opencv \u7684\u9608\u503c\u51fd\u6570 threshold\uff0c\u7f51\u4e0a\u641c\u7d22\u4e86\u4e0b\u8fd9\u4e2a\u51fd\u6570\u7684\u4f7f\u7528\u8bf4 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[300,5],"tags":[],"class_list":["post-971","post","type-post","status-publish","format-standard","hentry","category-python","category-daily"],"_links":{"self":[{"href":"https:\/\/blog.5danyuan.com\/index.php?rest_route=\/wp\/v2\/posts\/971","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.5danyuan.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.5danyuan.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.5danyuan.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.5danyuan.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=971"}],"version-history":[{"count":0,"href":"https:\/\/blog.5danyuan.com\/index.php?rest_route=\/wp\/v2\/posts\/971\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.5danyuan.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=971"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.5danyuan.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=971"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.5danyuan.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=971"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}