Decode Unreadable Barcodes with Dynamsoft Barcode Reader's Custom Scan Parameters

< Back

Batch QR Codes

Issue:

When it comes to scanning hundreds of barcodes in an image, Dynamsoft offers many optimization settings to effectively and quickly batch scan QR Codes.

Solution:

First, set the barcode type to QR code if your image only contains this type of code to reduce decoding time. Next, set the ImagePreprocessingModes to eliminate blurriness and set the ThresholdCompensation in BinarizationModes higher to improve the binary image with a dark background. Then, try different localization methods to accurately pinpoint the barcode locations. At last, set the ExpectedBarcodesCount to a large number such as 999 to make sure that the algorithm works really hard to decode as many barcodes as possible.

JSON Template:

{
  "ImageParameter" : {
    "BinarizationModes": [
      {
        "BlockSizeX": 0,
        "BlockSizeY": 0,
        "EnableFillBinaryVacancy": 1,
        "ImagePreprocessingModesIndex": -1,
        "LibraryFileName": "",
        "LibraryParameters": "",
        "Mode": "BM_LOCAL_BLOCK",
        "ThresholdCompensation": 20
      }
    ],
    "LocalizationModes": [
      {
        "LibraryFileName": "",
        "LibraryParameters": "",
        "Mode": "LM_CONNECTED_BLOCKS"
      },
      {
        "IsOneDStacked": 0,
        "LibraryFileName": "",
        "LibraryParameters": "",
        "Mode": "LM_SCAN_DIRECTLY",
        "ScanDirection": 0,
        "ScanStride": 0
      },
      {
        "LibraryFileName": "",
        "LibraryParameters": "",
        "Mode": "LM_STATISTICS"
      },
      {
        "LibraryFileName": "",
        "LibraryParameters": "",
        "Mode": "LM_LINES"
      }
    ],
    "BarcodeFormatIds": [
      "BF_QR_CODE",
      "BF_MICRO_QR"
    ],
    "ExpectedBarcodesCount": 999,
    "ImagePreprocessingModes": [
      {
        "LibraryFileName": "",
        "LibraryParameters": "",
        "Mode": "IPM_GENERAL"
      },
      {
        "LibraryFileName": "",
        "LibraryParameters": "",
        "Mode": "IPM_GRAY_EQUALIZE",
        "Sensitivity": 5
      },
      {
        "LibraryFileName": "",
        "LibraryParameters": "",
        "Mode": "IPM_GRAY_SMOOTH",
        "SmoothBlockSizeX": 3,
        "SmoothBlockSizeY": 3
      }
    ],
    "Name": "Settings"
  },
  "Version" : "3.0"
}

×

Binarized image produced by Dynamsoft Barcode Reader:

Template for Dynamsoft Barcode Reader:

JavaScript Code Snippet to Use the Template:

barcodeReader.initRuntimeSettingsWithString(template);
Multiple
Blur
Good quality
Other
QR Code

Download Our Free Barcode Test Sheet

Curious about how our Dynamsoft Barcode Scanner SDK works in real-world applications? Download our free Barcode Test Sheet, a comprehensive PDF packed with different types of barcodes, batched barcodes or even damaged codes ready to be scanned. Explore the real-world examples to see how Dynamsoft can boost your scanning performance and tackle the challenges of difficult-to-read barcodes.

Barcode Test Sheet
barcode-test-sheet-illus.png