权限没有,则隐藏 function forum_list_access_filter($forumlist, $gid, $allow = 'allowread') { global $grouplist; if (empty($forumlist)) return array(); if (1 == $gid) return $forumlist; $forumlist_filter = $forumlist; $group = $grouplist[$gid]; foreach ($forumlist_filter as $fid => $forum) { if (empty($forum['accesson']) && empty($group[$allow]) || !empty($forum['accesson']) && empty($forum['accesslist'][$gid][$allow])) { unset($forumlist_filter[$fid]); } unset($forumlist_filter[$fid]['accesslist']); } return $forumlist_filter; } function forum_filter_moduid($moduids) { $moduids = trim($moduids); if (empty($moduids)) return ''; $arr = explode(',', $moduids); $r = array(); foreach ($arr as $_uid) { $_uid = intval($_uid); $_user = user_read($_uid); if (empty($_user)) continue; if ($_user['gid'] > 4) continue; $r[] = $_uid; } return implode(',', $r); } function forum_safe_info($forum) { //unset($forum['moduids']); return $forum; } function forum_filter($forumlist) { foreach ($forumlist as &$val) { unset($val['brief'], $val['announcement'], $val['seo_title'], $val['seo_keywords'], $val['create_date_fmt'], $val['icon_url'], $val['modlist']); } return $forumlist; } function forum_format_url($forum) { global $conf; if (0 == $forum['category']) { // 列表URL $url = url('list-' . $forum['fid'], '', FALSE); } elseif (1 == $forum['category']) { // 频道 $url = url('category-' . $forum['fid'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = url('read-' . trim($forum['brief']), '', FALSE); } if ($conf['url_rewrite_on'] > 1 && $forum['well_alias']) { if (0 == $forum['category'] || 1 == $forum['category']) { $url = url($forum['well_alias'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = ($forum['threads'] && $forum['brief']) ? url($forum['well_alias'] . '-' . trim($forum['brief']), '', FALSE) : url($forum['well_alias'], '', FALSE); } } return $url; } function well_forum_alias() { $forumlist = forum_list_cache(); if (empty($forumlist)) return ''; $key = 'forum-alias'; static $cache = array(); if (isset($cache[$key])) return $cache[$key]; $cache[$key] = array(); foreach ($forumlist as $val) { if ($val['well_alias']) $cache[$key][$val['fid']] = $val['well_alias']; } return array_flip($cache[$key]); } function well_forum_alias_cache() { global $conf; $key = 'forum-alias-cache'; static $cache = array(); // 用静态变量只能在当前 request 生命周期缓存,跨进程需要再加一层缓存:redis/memcached/xcache/apc if (isset($cache[$key])) return $cache[$key]; if ('mysql' == $conf['cache']['type']) { $arr = well_forum_alias(); } else { $arr = cache_get($key); if (NULL === $arr) { $arr = well_forum_alias(); !empty($arr) AND cache_set($key, $arr); } } $cache[$key] = empty($arr) ? '' : $arr; return $cache[$key]; } ?>How to read the barcode from image using javascriptjquery? - Stack Overflow
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How to read the barcode from image using javascriptjquery? - Stack Overflow

programmeradmin9浏览0评论

I'm trying to read the barcode value from image. I used get_barcode_from_image.js file but i'm getting either "false" or "XXXXXXXXXXXXXX" value not getting the exact value.

<img id="barcode" src="barcode.png"/>
<br/>
<button onclick="alert(getBarcodeFromImage('barcode'))">Scan</button>

Any suggestions for how to get the correct value of barcode image ?

Thanks in Advance.

I'm trying to read the barcode value from image. I used get_barcode_from_image.js file but i'm getting either "false" or "XXXXXXXXXXXXXX" value not getting the exact value.

<img id="barcode" src="barcode.png"/>
<br/>
<button onclick="alert(getBarcodeFromImage('barcode'))">Scan</button>

Any suggestions for how to get the correct value of barcode image ?

Thanks in Advance.

Share Improve this question asked Dec 27, 2013 at 13:52 LuckyLucky 4253 gold badges8 silver badges19 bronze badges 1
  • Can you show the image? – JJJ Commented Dec 27, 2013 at 13:54
Add a ment  | 

3 Answers 3

Reset to default 2

Try this option, look the links.

https://github./EddieLa/BarcodeReader

Demo

I found 3 solutions:

  1. QuaggaJS library (open source) for reading barcodes, all done in JavaScript.

    Supports EAN, CODE 128, CODE 39, EAN 8, UPC-A, UPC-C, and CODABAR

    But you need to Choose Barcode type..

  2. webcodecamjs Choose automatically but not supported well in Mobile.

  3. this JavaScript barcode scanner also open source and free

    https://github./EddieLa/BarcodeReader

    and was the most acquired scanner (the other 2 wasn't deocode some barcodes).

    Atenntion that there is 2 changes need in JavaScript barcode scanner example for making it work:

    • remove the two require() in BarcodeReader, instead, add script tag with src pointing to the two js files: exif.js, DecoderWorker.js.

    • in exif.js, remove var before "root = this" to make root global. Otherwise, root is undefined.

    From Here

There is Scandit Barcode Scanner SDK for the Web which is a barcode recognition engine written in C++. It's piled to WebAssembly so it can run in modern browsers.

Here's a live demo that uses the web or phone camera.

There's also a client library that can be used to process one frame like this:

<img id="barcode" src="image.png">

<script src="https://unpkg./scandit-sdk"></script>
<script>
    var image = document.getElementById('barcode');

    var canvasContext = document.createElement('canvas').getContext('2d');
    canvasContext.drawImage(image, 0, 0);
    var imageData = canvasContext.getImageData(0, 0, image.width, image.height).data;

    console.log('Loading...');
    ScanditSDK.configure("xxx", {
engineLocation: "https://unpkg./scandit-sdk/build/"
    }).then(() => {
      console.log('Loaded');
      var scanner = new ScanditSDK.Scanner({
        imageSettings: {
          width: image.width,
          height: image.height,
          format: ScanditSDK.ImageSettings.Format.RGBA_8U
        },
        scanSettings: new ScanditSDK.ScanSettings({
          enabledSymbologies: [ScanditSDK.Barcode.Symbology.QR]
        })
      });
      scanner.onReady(function() {
        console.log('Ready');
        scanner.processImage(imageData)
          .then(result => console.log(result));
      });
    });
</script>

Links:

  • npm
  • Documentation

Disclaimer: I work for Scandit

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