Barcode Reader SDK使用教程：Web摄像机读取条码

 1 // <summary>
 2 /// Function to read barcodes from image (used by new created Thread object)
 3 /// </summary>
 4 public void <span data-scayt_word="startImageProcessing" data-scaytid="2">startImageProcessing</span>()
 5 {
 6 try
 7 {
 8 // work while user has not changed the status to false (i.e. false <span data-scayt_word="meanse" data-scayt>meanse</span> user canceled the scan)
 9 while (STATUS)
10 {
11 // get current frame bitmap from camera using <span data-scayt_word="Touchless" data-scayt>Touchless</span> lib
12 Bitmap bitmap = MANAGER.CurrentCamera.GetCurrentImage();
13 // search for bar codes
14 <span data-scayt_word="findBarcodes" data-scaytid="5">findBarcodes</span>(bitmap);
15 
16 // wait for a little to lower the CPU load
17 Thread.Sleep(SCAN_DELAY);
18 }
19 }
20 catch
21 {
22 ; // suppress errors if any
23 }
24 }

 1 /// <summary>
 2 /// Finds barcodes from bitmap object
 3 /// </summary>
 4 /// <param name="img">input bitmap
 5 private void <span data-scayt_word="findBarcodes" data-scaytid="8">findBarcodes</span>(Bitmap <span data-scayt_word="img" data-scaytid="10">img</span>)
 6 {
 7 // create barcode object
 8 Reader reader = new Reader();
 9 
10 // limit to <span data-scayt_word="1D" data-scayt>2d</span> are not included to speed up search)
11 // change to SymbologyFilter.FindAll to scan for all possible <span data-scayt_word="1D" data-scayt>2D</span> barcodes
12 reader.TypeToFind = <span data-scayt_word="GetBarcodeTypeToFindFromCombobox" data-scaytid="16">GetBarcodeTypeToFindFromCombobox</span>();
13 
14 // you may optimize processing by setting number of barcodes per page
15 //reader.MaxNumberOfBarcodesPerPage = 1;
16 
17 // read barcodes from bitmap
18 reader.ReadFrom(<span data-scayt_word="img" data-scaytid="11">img</span>);
19 
20 // save current time
21 String <span data-scayt_word="timeNow" data-scaytid="17">timeNow</span> = string.Format("{0:<span data-scayt_word="HH" data-scaytid="19">HH</span>:mm:<span data-scayt_word="ss" data-scaytid="20">ss</span>:<span data-scayt_word="tt" data-scaytid="21">tt</span>}", DateTime.Now);
22 
23 // check barcode scan results
24 if (reader.FoundBarcodes.Length > 0)
25 {
26 textAreaBarcodes.SelectionStart = 0;
27 textAreaBarcodes.SelectionLength = 0;
28 textAreaBarcodes.SelectedText = "<span data-scayt_word="nTime" data-scaytid="22">nTime</span>: " + <span data-scayt_word="timeNow" data-scaytid="18">timeNow</span> + "
";
29 
30 // insert barcodes into the text area output
31 <span data-scayt_word="foreach" data-scaytid="23">foreach</span> (<span data-scayt_word="FoundBarcode" data-scaytid="24">FoundBarcode</span> barcode in reader.FoundBarcodes)
32 {
33 // make a sound that we found the barcode (not working on <span data-scayt_word="x64" data-scayt>x64</span> due to Microsoft changed it)
34 Console.Beep();
35 // form the string with barcode value
36 String <span data-scayt_word="barcodeValue" data-scaytid="26">barcodeValue</span> = String.Format("Found: {0} {1}" + "
", barcode.Type, barcode.Value);
37 // add barcode to the text area output
38 textAreaBarcodes.SelectedText = <span data-scayt_word="barcodeValue" data-scaytid="27">barcodeValue</span> + "
";
39 // add barcode to the list of saved barcodes
40 m_foundBarcodes.Add(barcode);
41 // increase counter of found barcodes
42 <span data-scayt_word="foundBarcodesCount" data-scaytid="28">foundBarcodesCount</span>++;
43 // update status text with number of barcodes
44 lblFoundBarcodes.Text = String.Format("Found {0} barcodes:", <span data-scayt_word="foundBarcodesCount" data-scaytid="29">foundBarcodesCount</span>);
45 }
46 }
47 // make flickering for "Scanning..." label
48 lblScanning.Visible = !lblScanning.Visible;
49 lblScanning.Update();
50 
51 }