{"id":744,"date":"2023-05-08T17:48:47","date_gmt":"2023-05-08T08:48:47","guid":{"rendered":"https:\/\/blog.app.sensing-api.com\/?p=744"},"modified":"2023-10-02T16:43:48","modified_gmt":"2023-10-02T07:43:48","slug":"node-js-express-lpr_api-%e3%81%a7%e3%83%8a%e3%83%b3%e3%83%90%e3%83%bc%e3%83%97%e3%83%ac%e3%83%bc%e3%83%88%e8%aa%8d%e8%ad%98%e8%a7%a3%e8%aa%ac","status":"publish","type":"post","link":"https:\/\/blog.app.sensing-api.com\/?p=744","title":{"rendered":"Node.js + Express + LPR_API \u3067\u30ca\u30f3\u30d0\u30fc\u30d7\u30ec\u30fc\u30c8\u8a8d\u8b58(\u89e3\u8aac\u30fb\u524d\u7de8)"},"content":{"rendered":"\n

\u524d\u56de<\/a>Node.Js\u3068Express\u3092\u5229\u7528\u3057\u3066\u30ca\u30f3\u30d0\u30fc\u30d7\u30ec\u30fc\u30c8\u8a8d\u8b58\u3092\u884c\u3046\u8eca\u756a\u8a8d\u8b58\u30e1\u30e2\u30a2\u30d7\u30ea\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3057\u305f\u304c\u3001\u4eca\u56de\u306f\u305d\u306e\u30b5\u30f3\u30d7\u30eb\u30a2\u30d7\u30ea\u306e\u958b\u767a\u306e\u4e3b\u8981\u90e8\u5206\u306e\u624b\u9806\u3068\u8a73\u7d30\u8a2d\u5b9a\u306b\u3064\u3044\u3066\uff12\u56de\u306b\u5206\u3051\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u30b5\u30f3\u30d7\u30eb\u30a2\u30d7\u30ea\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306f\u968f\u6642GitHub<\/a>\u306b\u3066\u516c\u958b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<\/a>\n\n\n\n

\u7b2c\uff11\u56de\u306f\u7aef\u672b\u30ab\u30e1\u30e9\u306e\u30d6\u30e9\u30a6\u30b6\u8868\u793a\u3068\u753b\u50cf\u53d6\u5f97\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

1.\u4e8b\u524d\u6e96\u5099<\/strong><\/p>\n\n\n\n

\u30fbNode.js + Express\u306e\u74b0\u5883\u69cb\u7bc9(\u30b5\u30f3\u30d7\u30eb\u30a2\u30d7\u30ea\u3067\u306fnode:lts-alpine3.16\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002)
\u30fb\u30ab\u30e1\u30e9\u3092\u4f7f\u7528\u3059\u308b\u306e\u3067\u30ab\u30e1\u30e9\u304c\u4ed8\u5c5e\u3057\u3066\u3044\u308bPC\u3082\u3057\u304f\u306f\u3001\u5916\u4ed8\u3051\u30ab\u30e1\u30e9\u3092\u3054\u7528\u610f\u304f\u3060\u3055\u3044\u3002
\u30fbSensingAPI\u3078\u306e\u767b\u9332\u3001LPR_API\u306e\u30c8\u30fc\u30af\u30f3\u767a\u884c
LPR API\u306eAPI\u30c8\u30fc\u30af\u30f3\u306e\u767a\u884c\u304c\u304a\u6e08\u307f\u3067\u306a\u3044\u65b9\u306f\u3001\u300cSensingAPI \u521d\u3081\u306e\u4e00\u6b69<\/a>\u300d\u306e\u2460\uff5e\u2462\u307e\u3067\u306e\u8a18\u4e8b\u3092\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\u3002
\u203bAPI\u306e\u3054\u5229\u7528\u306b\u5fdc\u3058\u3066\u5229\u7528\u6599\u91d1\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u3042\u3089\u304b\u3058\u3081\u3054\u4e86\u627f\u304f\u3060\u3055\u3044\u3002<\/mark><\/p>\n\n\n\n

2.\u30ab\u30e1\u30e9\u753b\u9762<\/strong><\/p>\n\n\n\n

\u307e\u305a\u3001\u7aef\u672b\u30ab\u30e1\u30e9\u3092\u30d6\u30e9\u30a6\u30b6\u4e0a\u306b\u8868\u793a\u3057\u3066\u30dc\u30bf\u30f3\u3067\u753b\u50cf\u3092\u53d6\u5f97\u3059\u308b\u6a5f\u80fd\u3092\u4f5c\u3063\u3066\u3044\u304d\u307e\u3059\u3002
\u65b0\u898f\u306eejs\u3001html\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3066\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u5165\u529b\u3057\u307e\u3059\u3002\u30b5\u30f3\u30d7\u30eb\u30a2\u30d7\u30ea\u3067\u306fcamera.ejs\u3067\u4f5c\u6210\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

<div class=\"container\" style=\"text-align:center\">\n\u3000<video ref=\"video\" id=\"video\" width=\"800\" height=\"450\" muted autoplay playsinline ><\/video>\n<\/div><\/code><\/pre>\n\n\n\n
\u52d5\u753b\u57cb\u3081\u8fbc\u307f\u8981\u7d20\u306e<Video>\u3092\u5229\u7528\u3057\u3066\u30ab\u30e1\u30e9\u306e\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u8868\u793a\u3057\u307e\u3059\u3002
\u203b\u5e45\u3068\u9ad8\u3055\u306f\u304a\u597d\u307f\u3067\u8abf\u7bc0\u3057\u3066\u3044\u305f\u3060\u3044\u3066\u69cb\u3044\u307e\u305b\u3093\u3001\u5229\u7528\u3059\u308b\u30ab\u30e1\u30e9\u306e\u30b9\u30da\u30af\u30c8\u30e9\u30e0\u6bd4\u306b\u5408\u308f\u305b\u3066\u8abf\u6574\u3057\u3066\u304f\u3060\u3055\u3044\u3001\u305f\u3060\u3057\u3001LPR_API\u3067\u5229\u7528\u3067\u304d\u308b\u753b\u50cf1\u679a\u3042\u305f\u308a\u306e\u89e3\u50cf\u5ea6\u304c1920×1080\u76f8\u5f53\u307e\u3067\uff08\u753b\u50cf\u306e\u30d4\u30af\u30bb\u30eb\u6570\u304c2,400,000\u30d4\u30af\u30bb\u30eb\u4ee5\u5185\uff09\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u9001\u308b\u753b\u50cf\u306e\u30b5\u30a4\u30ba\u306f\u4e00\u5ea6\u3054\u78ba\u8a8d\u304f\u3060\u3055\u3044\u3002

\u4ee5\u4e0b\u306fJavaScrit\u30b3\u30fc\u30c9\u3067\u3001\u7aef\u672b\u306e\u30ab\u30e1\u30e9\u3092\u53d6\u5f97\u3057<Video>\u306b\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u8868\u793a\u3059\u308b\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n\n\n\n
<script>\nthis.video = document.getElementById(\"video\");\nif (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {\n  navigator.mediaDevices.getUserMedia({\n    video: {facingMode: 'environment',\n            width:{min:800},\n            height:{min:450}\n            }\n  }).then((stream) => {\n    this.video.srcObject = stream\n    this.video.play();\n    })\n}\n<\/script><\/code><\/pre>\n\n\n\n
facingMode\u3067\u5229\u7528\u3059\u308b\u30ab\u30e1\u30e9\u3092\u9078\u629e\u3067\u304d\u307e\u3059\u3002
\u8d77\u52d5\u78ba\u8a8d\u3092\u884c\u3046\u305f\u3081\u3001\u30b5\u30fc\u30d0\u5074\u306eJS\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u30b5\u30f3\u30d7\u30eb\u30a2\u30d7\u30ea\u3067\u306fapp.js\u3067\u4f5c\u6210\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
const express = require('express');\nconst app = express();\n\napp.get('\/', (req, res) => {\n  res.render('camera.ejs');\n});\napp.listen(3000);<\/code><\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u8d77\u52d5\u3059\u308b\u3068\u3001\u753b\u50cf\u306e\u3088\u3046\u306b\u7aef\u672b\u30ab\u30e1\u30e9\u304c\u30d6\u30e9\u30a6\u30b6\u4e0a\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
3.\u64ae\u5f71\u30a2\u30af\u30b7\u30e7\u30f3\u30fb\u753b\u50cf\u53d6\u5f97<\/strong><\/p>\n\n\n\n
\u30dc\u30bf\u30f3\u30a2\u30af\u30b7\u30e7\u30f3\u3067<Video>\u30b9\u30c8\u30ea\u30fc\u30e0\u304b\u3089drawImage\u3067<Canvas>\u306b\u30ad\u30e3\u30d7\u30c1\u30e3\u753b\u50cf\u3092\u53d6\u5f97\u3057\u3001toDataURL\u3067<Canvas>\u304b\u3089Base64\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u307e\u305a\u3001\u30dc\u30bf\u30f3\u3068\u3001Canvas\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
<div class=\"container\" style=\"text-align:center;flex-direction: column\">\n\u3000<video ref=\"video\" id=\"video\" width=\"800\" height=\"450\" muted autoplay playsinline ><\/video>\n  <div class=\"container\" style=\"margin-bottom: 10px;\">\n    <button id=\"submit-button\"  type=\"button\" width=\"200\" height=\"30\">\u64ae\u5f71\u30dc\u30bf\u30f3<\/button>\n  <\/div>\n  <canvas ref=\"canvas\" id=\"canvas\" width=\"0\" height=\"0\" name=\"file1\"  class=\"nonedisp\"><\/canvas>\n\n<\/div><\/code><\/pre>\n\n\n\n
\u30dc\u30bf\u30f3\u30a2\u30af\u30b7\u30e7\u30f3\u3068\u753b\u50cf\u53d6\u5f97\u306e\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306b\u306a\u308a\u307e\u3059\u3002
Base64\u3092\u53d6\u5f97\u3057\u305f\u5f8c\u3001API\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u6e21\u3059\u305f\u3081\u306eBlob\u30c7\u30fc\u30bf\u306e\u4f5c\u6210\u3082\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
<script>\n  const SubmitButton = document.getElementById(\"submit-button\");\n  this.video = document.getElementById(\"video\");\n  this.canvas = document.getElementById(\"canvas\");\n\n  if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {\n    \n                    ~\u7701\u7565~\n          this.video.play();\n        })\n        \/\/\u30ad\u30e3\u30f3\u30d0\u30b9\u306e\u30b5\u30a4\u30ba\u6307\u5b9a\n        this.canvas.setAttribute( \"width\" , 800);\n        this.canvas.setAttribute( \"height\" ,450);\n\n  }\n  \n  SubmitButton.onclick = () => {  \n    this.canvas = document.getElementById(\"canvas\");\n    this.canvas.getContext('2d').drawImage(this.video,0,0,\n    this.video.clientWidth,this.video.clientHeight);\n    let base64 = this.canvas.toDataURL(\"image\/jpeg\");\n    \/\/ base64\u304b\u3089Blob\u30c7\u30fc\u30bf\u3092\u4f5c\u6210\n    let barr, bin, i, len;\n    bin = atob(base64.split(\"base64,\")[1]);\n    len = bin.length;\n\n    barr = new Uint8Array(len);\n    i = 0;\n    while (i < len) {\n      barr[i] = bin.charCodeAt(i);\n      i++;\n    }\n      this.blob = new Blob([barr], { type: \"image\/jpeg\" });\n  }<\/code><\/pre>\n\n\n\n
\u8d77\u52d5\u3059\u308b\u3068\u753b\u50cf\u306e\u3088\u3046\u306b\u30dc\u30bf\u30f3\u30a2\u30af\u30b7\u30e7\u30f3\u3067\u53d6\u5f97\u3057\u305f\u753b\u50cf\u304cCanvas\u4e0a\u306b\u8868\u793a\u3055\u308c\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u307e\u3068\u3081<\/h2>\n\n\n\n
\u4eca\u56de\u306f\u305d\u306e\u30b5\u30f3\u30d7\u30eb\u30a2\u30d7\u30ea\u306e\u7aef\u672b\u30ab\u30e1\u30e9\u306e\u30d6\u30e9\u30a6\u30b6\u8868\u793a\u3068\u753b\u50cf\u53d6\u5f97\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002\u6b21\u56de\u306f\u53d6\u5f97\u3057\u305f\u753b\u50cf\u30c7\u30fc\u30bf\u3092\u7528\u3044\u3066LPR_API\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u308b\u624b\u9806\u306b\u3064\u3044\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
EyeTech Sensing API\u306f\u3001\u7c21\u5358\u306b\u7121\u6599\u3067\u4f1a\u54e1\u767b\u9332\u304c\u3067\u304d\u308b\u753b\u50cf\u8a8d\u8b58API\u30b5\u30fc\u30d3\u30b9\u3067\u3059\u3002\u6700\u5148\u7aef\u306e\u30ca\u30f3\u30d0\u30fc\u30d7\u30ec\u30fc\u30c8\u8a8d\u8b58API\u300cLPR API\u300d\u3092\u3001Web\u304b\u3089\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3067\u4f1a\u54e1\u767b\u9332\u3059\u308b\u3060\u3051\u3067\u3001\u3059\u3050\u306b\u3054\u5229\u7528\u3044\u305f\u3060\u3051\u307e\u3059\u3002<\/p>\n\n\n\n
\n
LPR API\u306b\u3064\u3044\u3066 \u3082\u3063\u3068\u8a73\u3057\u304f<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u524d\u56deNode.Js\u3068Express\u3092\u5229\u7528\u3057\u3066\u30ca\u30f3\u30d0\u30fc\u30d7\u30ec\u30fc\u30c8\u8a8d\u8b58\u3092\u884c\u3046\u8eca\u756a\u8a8d\u8b58\u30e1\u30e2\u30a2\u30d7\u30ea\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3057\u305f\u304c\u3001\u4eca\u56de\u306f\u305d\u306e\u30b5\u30f3\u30d7\u30eb\u30a2\u30d7\u30ea\u306e\u958b\u767a\u306e\u4e3b\u8981\u90e8\u5206\u306e\u624b\u9806\u3068\u8a73\u7d30\u8a2d\u5b9a\u306b\u3064\u3044\u3066\uff12\u56de\u306b\u5206\u3051\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002 \u30b5\u30f3\u30d7\u30eb\u30a2 … “Node.js + Express + LPR_API \u3067\u30ca\u30f3\u30d0\u30fc\u30d7\u30ec\u30fc\u30c8\u8a8d\u8b58(\u89e3\u8aac\u30fb\u524d\u7de8)”\u306e<\/span>\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,5,10],"tags":[],"class_list":["post-744","post","type-post","status-publish","format-standard","hentry","category-tech","category-use","category-casestudy"],"_links":{"self":[{"href":"https:\/\/blog.app.sensing-api.com\/index.php?rest_route=\/wp\/v2\/posts\/744","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.app.sensing-api.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.app.sensing-api.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.app.sensing-api.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.app.sensing-api.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=744"}],"version-history":[{"count":21,"href":"https:\/\/blog.app.sensing-api.com\/index.php?rest_route=\/wp\/v2\/posts\/744\/revisions"}],"predecessor-version":[{"id":973,"href":"https:\/\/blog.app.sensing-api.com\/index.php?rest_route=\/wp\/v2\/posts\/744\/revisions\/973"}],"wp:attachment":[{"href":"https:\/\/blog.app.sensing-api.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=744"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.app.sensing-api.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=744"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.app.sensing-api.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=744"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}