{"id":91559,"date":"2024-04-09T18:31:10","date_gmt":"2024-04-09T10:31:10","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/91559.html"},"modified":"2024-04-09T18:31:11","modified_gmt":"2024-04-09T10:31:11","slug":"javascript%e4%b8%ad%e7%9a%84%e5%9b%be%e5%83%8f%e7%bc%96%e8%be%91%e5%92%8c%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/91559.html","title":{"rendered":"JavaScript\u4e2d\u7684\u56fe\u50cf\u7f16\u8f91\u548c\u5904\u7406"},"content":{"rendered":"

\"JavaScript\u4e2d\u7684\u56fe\u50cf\u7f16\u8f91\u548c\u5904\u7406\"<\/p>\n

\u5728JavaScript\u4e2d\u8fdb\u884c\u56fe\u50cf\u7f16\u8f91\u548c\u5904\u7406\u662f\u76f8\u5f53\u9ad8\u6548\u548c\u7075\u6d3b\u7684\uff0c\u5229\u7528\u5404\u79cd\u73b0\u6210\u7684\u5e93\u548cAPI\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u5b9e\u73b0\u5404\u79cd\u56fe\u50cf\u5904\u7406\u6548\u679c\uff0c\u5982\u8c03\u6574\u5927\u5c0f\u3001\u6539\u53d8\u989c\u8272\u3001\u5e94\u7528\u6ee4\u955c\u3001\u526a\u88c1\u548c\u65cb\u8f6c\u7b49<\/strong>\u3002\u5176\u4e2d\u6700\u6838\u5fc3\u7684\u90e8\u5206\u5728\u4e8e\u5229\u7528HTML5\u7684<canvas><\/code>\u5143\u7d20\u548c\u76f8\u5e94\u7684Canvas API\u8fdb\u884c\u64cd\u4f5c\u3002\u53ef\u4ee5\u8bf4\uff0c\u5229\u7528<canvas><\/code>\u8fdb\u884c\u56fe\u50cf\u5904\u7406\u662f\u975e\u5e38\u5f3a\u5927\u7684\uff0c\u5b83\u4e0d\u4ec5\u5141\u8bb8\u50cf\u7d20\u7ea7\u522b\u7684\u56fe\u50cf\u7f16\u8f91\uff0c\u8fd8\u80fd\u5b9e\u73b0\u52a8\u6001\u7684\u56fe\u5f62\u521b\u5efa\u548c\u56fe\u50cf\u53d8\u6362\u3002<\/p>\n<\/p>\n

\u6211\u4eec\u91cd\u70b9\u5c55\u5f00\u4ecb\u7ecd\u5229\u7528<canvas><\/code>\u8fdb\u884c\u56fe\u50cf\u5904\u7406\u3002<canvas><\/code>\u6807\u7b7e\u5b9a\u4e49\u4e86\u4e00\u4e2a\u753b\u5e03\uff0c\u53ef\u4ee5\u7528JavaScript\u5728\u753b\u5e03\u4e0a\u7ed8\u5236\u56fe\u5f62\uff08\u5982\u7ebf\u6761\u3001\u5706\u6216\u8005\u5176\u4ed6\u56fe\u5f62\uff09\u3002\u4f46\u5b83\u7684\u80fd\u529b\u8fdc\u4e0d\u6b62\u4e8e\u6b64\uff0c\u5b83\u8fd8\u53ef\u4ee5\u7528\u6765\u5904\u7406\u548c\u4fee\u6539\u56fe\u50cf\u3002\u5f00\u53d1\u8005\u53ef\u4ee5\u4f7f\u7528Canvas API\u8bfb\u53d6\u56fe\u50cf\u7684\u50cf\u7d20\u6570\u636e\uff0c\u4e4b\u540e\u53ef\u4ee5\u4fee\u6539\u8fd9\u4e9b\u6570\u636e\u6765\u5b9e\u73b0\u56fe\u50cf\u7684\u8272\u5f69\u53d8\u6362\u3001\u5e94\u7528\u4e0d\u540c\u7684\u56fe\u50cf\u6548\u679c\uff08\u5982\u7070\u5ea6\u5316\u3001\u53cd\u76f8\u8272\u7b49\uff09\uff0c\u6216\u8005\u662f\u5c06\u591a\u4e2a\u56fe\u50cf\u5408\u5e76\u5728\u4e00\u8d77\u3002\u8fd9\u4f7f\u5f97<canvas><\/code>\u6210\u4e3a\u5b9e\u73b0\u590d\u6742\u56fe\u50cf\u5904\u7406\u903b\u8f91\u7684\u5f3a\u5927\u5de5\u5177\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528CANVAS API\u8fdb\u884c\u57fa\u7840\u56fe\u50cf\u5904\u7406<\/h3>\n<\/p>\n

Canvas API\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u4e30\u5bcc\u7684\u65b9\u6cd5\u7528\u4e8e\u56fe\u50cf\u7f16\u8f91\uff0c\u5305\u62ec\u7ed8\u5236\u3001\u8f6c\u6362\u548c\u5176\u4ed6\u64cd\u4f5c\u3002\u9996\u5148\uff0c\u8981\u5bf9\u56fe\u50cf\u8fdb\u884c\u5904\u7406\uff0c\u5f00\u53d1\u8005\u9700\u8981\u5c06\u56fe\u50cf\u7ed8\u5236\u5230\u753b\u5e03\u4e0a\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u4e00\u4e2aImage<\/code>\u5bf9\u8c61\uff0c\u7136\u540e\u5728\u5176onload<\/code>\u4e8b\u4ef6\u4e2d\u4f7f\u7528drawImage()<\/code>\u65b9\u6cd5\u6765\u5b9e\u73b0\u3002<\/p>\n<\/p>\n

\u4e00\u65e6\u56fe\u50cf\u88ab\u7ed8\u5236\u5230\u753b\u5e03\u4e0a\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528getImageData()<\/code>\u65b9\u6cd5\u83b7\u53d6\u753b\u5e03\u4e0a\u6307\u5b9a\u533a\u57df\u7684\u50cf\u7d20\u6570\u636e\u3002\u8fd9\u4e2a\u6570\u636e\u53ef\u4ee5\u88ab\u8fdb\u4e00\u6b65\u5904\u7406\uff0c\u6bd4\u5982\u8c03\u6574\u4eae\u5ea6\u3001\u5bf9\u6bd4\u5ea6\u6216\u5e94\u7528\u6ee4\u955c\u7b49\u3002\u5904\u7406\u5b8c\u6bd5\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528putImageData()<\/code>\u65b9\u6cd5\u5c06\u4fee\u6539\u540e\u7684\u50cf\u7d20\u6570\u636e\u653e\u56de\u753b\u5e03\u4e0a\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u5b9e\u73b0\u56fe\u50cf\u7684\u8272\u5f69\u8c03\u6574<\/h3>\n<\/p>\n

\u56fe\u50cf\u7684\u8272\u5f69\u8c03\u6574\u662f\u56fe\u50cf\u5904\u7406\u4e2d\u4e00\u4e2a\u5e38\u89c1\u9700\u6c42\u3002\u901a\u8fc7\u64cd\u4f5c\u56fe\u50cf\u7684RGBA\u503c\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5982\u8c03\u8282\u4eae\u5ea6\u3001\u5bf9\u6bd4\u5ea6\u3001\u9971\u548c\u5ea6\u4ee5\u53ca\u5e94\u7528\u5404\u79cd\u8272\u5f69\u6ee4\u955c\u7b49\u6548\u679c\u3002\u8fd9\u4e00\u8fc7\u7a0b\u901a\u5e38\u6d89\u53ca\u8bfb\u53d6\u56fe\u50cf\u50cf\u7d20\u6570\u636e\uff0c\u7136\u540e\u9010\u4e2a\u50cf\u7d20\u5730\u8c03\u6574\u5176\u8272\u5f69\u503c\u3002<\/p>\n<\/p>\n

\u4f8b\u5982\uff0c\u8981\u5b9e\u73b0\u4e00\u4e2a\u7b80\u5355\u7684\u4eae\u5ea6\u8c03\u6574\u529f\u80fd\uff0c\u53ef\u4ee5\u5c06\u6bcf\u4e2a\u50cf\u7d20\u7684RGB\u503c\u7b49\u6bd4\u4f8b\u589e\u52a0\u6216\u51cf\u5c11\uff0c\u4ece\u800c\u4f7f\u56fe\u50cf\u770b\u8d77\u6765\u66f4\u4eae\u6216\u66f4\u6697\u3002\u5b9e\u73b0\u8fd9\u4e00\u529f\u80fd\u9700\u8981\u904d\u5386\u6bcf\u4e2a\u50cf\u7d20\uff0c\u5bf9\u5176RGB\u503c\u8fdb\u884c\u76f8\u5e94\u7684\u8c03\u6574\uff0c\u5904\u7406\u5b8c\u6bd5\u540e\u518d\u5c06\u6570\u636e\u5199\u56decanvas\u3002<\/p>\n<\/p>\n

\u4e09\u3001\u5e94\u7528\u56fe\u50cf\u6ee4\u955c<\/h3>\n<\/p>\n

\u56fe\u50cf\u6ee4\u955c\u6548\u679c\u53ef\u4ee5\u901a\u8fc7\u5bf9\u50cf\u7d20\u6570\u636e\u7684\u590d\u6742\u64cd\u4f5c\u6765\u5b9e\u73b0\uff0c\u6bd4\u5982\u6a21\u7cca\u3001\u9510\u5316\u3001\u8001\u7167\u7247\u6548\u679c\u7b49\u3002\u8fd9\u4e9b\u6548\u679c\u901a\u5e38\u9700\u8981\u8ba1\u7b97\u5468\u56f4\u50cf\u7d20\u7684\u503c\uff0c\u4ee5\u53ca\u53ef\u80fd\u7528\u5230\u56fe\u50cf\u5377\u79ef\u6280\u672f\u3002<\/p>\n<\/p>\n

\u4ee5\u6a21\u7cca\u6ee4\u955c\u4e3a\u4f8b\uff0c\u4e00\u79cd\u5b9e\u73b0\u65b9\u6cd5\u662f\u5bf9\u6bcf\u4e2a\u50cf\u7d20\u5e94\u7528\u9ad8\u65af\u6a21\u7cca\u7b97\u6cd5\uff0c\u8fd9\u9700\u8981\u8ba1\u7b97\u5f53\u524d\u50cf\u7d20\u5468\u56f4\u50cf\u7d20\u7684\u5e73\u5747\u503c\uff0c\u5e76\u7528\u8fd9\u4e2a\u5e73\u5747\u503c\u66ff\u6362\u5f53\u524d\u50cf\u7d20\u503c\u3002\u8fd9\u79cd\u5904\u7406\u65b9\u5f0f\u867d\u7136\u8ba1\u7b97\u91cf\u8f83\u5927\uff0c\u4f46\u6548\u679c\u663e\u8457\uff0c\u80fd\u6709\u6548\u5730\u6a21\u62df\u4eba\u773c\u89c6\u89c9\u4e2d\u7684\u6a21\u7cca\u6548\u679c\u3002<\/p>\n<\/p>\n

\u56db\u3001\u9ad8\u7ea7\u56fe\u50cf\u7f16\u8f91\u529f\u80fd<\/h3>\n<\/p>\n

\u9664\u4e86\u57fa\u672c\u7684\u56fe\u50cf\u5904\u7406\u529f\u80fd\uff0cJavaScript\u8fd8\u80fd\u5b9e\u73b0\u66f4\u9ad8\u7ea7\u7684\u56fe\u50cf\u7f16\u8f91\u4efb\u52a1\uff0c\u5982\u9762\u90e8\u8bc6\u522b\u3001\u56fe\u50cf\u5408\u6210\u7b49\u3002\u8fd9\u901a\u5e38\u9700\u8981\u501f\u52a9\u4e00\u4e9b\u5916\u90e8\u7684\u56fe\u50cf\u5904\u7406\u5e93\uff0c\u4f8b\u5982TensorFlow.js\u3001tracking.js\u7b49\u3002<\/p>\n<\/p>\n

\u56fe\u50cf\u5408\u6210\u53ef\u4ee5\u901a\u8fc7\u63d0\u53d6\u56fe\u50cf\u7684\u4e00\u90e8\u5206\uff0c\u7136\u540e\u5c06\u5176\u4e0e\u53e6\u4e00\u5f20\u56fe\u50cf\u7ed3\u5408\u8d77\u6765\u3002\u5982\u679c\u7ed3\u5408\u9762\u90e8\u8bc6\u522b\u6280\u672f\uff0c\u53ef\u4ee5\u5b9e\u73b0\u66f4\u52a0\u590d\u6742\u7684\u56fe\u50cf\u5408\u6210\u6548\u679c\uff0c\u5982\u6362\u8138\u3001\u52a8\u6001\u8d34\u56fe\u7b49\u3002\u9762\u90e8\u8bc6\u522b\u901a\u5e38\u9700\u8981\u8bad\u7ec3\u7279\u5b9a\u7684\u6a21\u578b\u6765\u8bc6\u522b\u4eba\u8138\u7279\u5f81\uff0c\u8fd9\u4e00\u8fc7\u7a0b\u867d\u7136\u590d\u6742\uff0c\u4f46\u6709\u8bb8\u591a\u73b0\u6210\u7684\u5e93\u53ef\u4f9b\u5229\u7528\uff0c\u5927\u5927\u7b80\u5316\u4e86\u5f00\u53d1\u8fc7\u7a0b\u3002<\/p>\n<\/p>\n

\u901a\u8fc7\u8fd9\u4e9b\u6280\u672f\u548c\u65b9\u6cd5\uff0cJavaScript\u5728\u56fe\u50cf\u7f16\u8f91\u548c\u5904\u7406\u65b9\u9762\u5c55\u73b0\u4e86\u5176\u5f3a\u5927\u7684\u80fd\u529b\u3002\u65e0\u8bba\u662f\u8fdb\u884c\u7b80\u5355\u7684\u56fe\u50cf\u8c03\u6574\u3001\u6ee4\u955c\u5e94\u7528\uff0c\u8fd8\u662f\u6267\u884c\u590d\u6742\u7684\u56fe\u50cf\u7f16\u8f91\u4efb\u52a1\uff0cJavaScript\u90fd\u80fd\u591f\u6709\u6548\u5730\u5b8c\u6210\uff0c\u4e3a\u5f00\u53d1\u8005\u63d0\u4f9b\u4e86\u6781\u5927\u7684\u7075\u6d3b\u6027\u548c\u521b\u9020\u529b\u3002<\/p>\n<\/p>\n

\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

\u4ec0\u4e48\u662fJavaScript\u4e2d\u7684\u56fe\u50cf\u5904\u7406\u548c\u7f16\u8f91\uff1f<\/strong>
\nJavaScript\u4e2d\u7684\u56fe\u50cf\u5904\u7406\u548c\u7f16\u8f91\u662f\u6307\u4f7f\u7528JavaScript\u7f16\u7a0b\u8bed\u8a00\u6765\u5bf9\u56fe\u50cf\u8fdb\u884c\u5404\u79cd\u64cd\u4f5c\u548c\u4fee\u6539\u7684\u8fc7\u7a0b\u3002\u901a\u8fc7\u4f7f\u7528\u4e0d\u540c\u7684JavaScript\u5e93\u548c\u6846\u67b6\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u5b9e\u73b0\u56fe\u50cf\u7684\u526a\u5207\u3001\u7f29\u653e\u3001\u65cb\u8f6c\u3001\u6ee4\u955c\u6548\u679c\u7b49\u591a\u79cd\u7f16\u8f91\u548c\u5904\u7406\u64cd\u4f5c\u3002<\/p>\n

\u6709\u54ea\u4e9b\u5e38\u7528\u7684JavaScript\u56fe\u50cf\u5904\u7406\u548c\u7f16\u8f91\u5e93\uff1f<\/strong>
\n\u5728JavaScript\u4e2d\uff0c\u6709\u8bb8\u591a\u6d41\u884c\u7684\u56fe\u50cf\u5904\u7406\u548c\u7f16\u8f91\u5e93\u53ef\u4f9b\u9009\u62e9\u3002\u5176\u4e2d\u4e00\u4e9b\u5305\u62ec\uff1aFabric.js\u3001Three.js\u3001Caman.js\u548cKonva.js\u7b49\u3002\u8fd9\u4e9b\u5e93\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u529f\u80fd\u548c\u5de5\u5177\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u5b9e\u73b0\u5404\u79cd\u56fe\u50cf\u64cd\u4f5c\u5e76\u8fdb\u884c\u7f16\u8f91\u3002<\/p>\n

\u5982\u4f55\u4f7f\u7528JavaScript\u8fdb\u884c\u56fe\u50cf\u7f16\u8f91\u548c\u5904\u7406\uff1f<\/strong>
\n\u8981\u4f7f\u7528JavaScript\u8fdb\u884c\u56fe\u50cf\u7f16\u8f91\u548c\u5904\u7406\uff0c\u9996\u5148\u9700\u8981\u5f15\u5165\u9002\u5f53\u7684\u56fe\u50cf\u5904\u7406\u5e93\u6216\u6846\u67b6\u3002\u7136\u540e\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u4f7f\u7528\u8be5\u5e93\u63d0\u4f9b\u7684\u65b9\u6cd5\u548c\u51fd\u6570\u6765\u5b9e\u73b0\u6240\u9700\u7684\u56fe\u50cf\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u5e93\u4e2d\u7684\u51fd\u6570\u6765\u8c03\u6574\u56fe\u50cf\u7684\u5c3a\u5bf8\u3001\u5e94\u7528\u6ee4\u955c\u6548\u679c\u3001\u6dfb\u52a0\u6587\u5b57\u6216\u8d34\u56fe\u7b49\u3002\u901a\u8fc7\u7ed3\u5408HTML\u548cCSS\uff0c\u5f00\u53d1\u8005\u8fd8\u53ef\u4ee5\u521b\u5efa\u4ea4\u4e92\u5f0f\u7684\u56fe\u50cf\u7f16\u8f91\u5668\uff0c\u4ee5\u4fbf\u7528\u6237\u80fd\u591f\u76f4\u63a5\u5728\u6d4f\u89c8\u5668\u4e2d\u8fdb\u884c\u56fe\u50cf\u7f16\u8f91\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728JavaScript\u4e2d\u8fdb\u884c\u56fe\u50cf\u7f16\u8f91\u548c\u5904\u7406\u662f\u76f8\u5f53\u9ad8\u6548\u548c\u7075\u6d3b\u7684\uff0c\u5229\u7528\u5404\u79cd\u73b0\u6210\u7684\u5e93\u548cAPI\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u5b9e\u73b0\u5404\u79cd\u56fe\u50cf […]","protected":false},"author":3,"featured_media":91561,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/91559"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=91559"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/91559\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/91561"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=91559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=91559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=91559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}