How to Read Barcodes from Images with Textures

In some scenes, the background of images may appear textured, such as a patterned background, screen stripes, etc. As shown below, the barcode background has an odd texture due to the computer screen it is being displayed on.

Sample barcode image with texture

Figure 1 – Sample barcode image with texture

This may extend the barcode localization time or even lead to localization errors. The texture detection feature of Dynamsoft Barcode Reader (DBR) works on images with textured backgrounds. The following two images demonstrate the binarized images used for localization without and with texture detection enabled:

Sample barcode image with texture

Figure 2 – Binarized image without texture detection enabled

Sample barcode image with texture

Figure 3 – Binarized image with texture detection enabled

As we can see, the binarized image with texture detection enabled is much better. Now we will demonstrate how to configure the parameter TextureDetectionModes to enable texture detection.

Sample Code

Below is an example illustrating how to configure the parameter TextureDetectionModes.

update parameter TextureDetectionModes in your JSON template

  {
      "CaptureVisionTemplates": [
          {
              "Name": "CV_0",
              "ImageROIProcessingNameArray": ["TA_0" ]
          }       
      ],
      "TargetROIDefOptions" : [
          {
              "Name": "TA_0",
              "TaskSettingNameArray": [ "BR_0" ]
          }
      ],
      "BarcodeReaderTaskSettingOptions": [
          {
              "Name" : "BR_0",
              "SectionImageParameterArray": [
                  {
                      "Section": "ST_REGION_PREDETECTION",
                      "ImageParameterName": "IP_0"
                  },
                  {
                      "Section": "ST_BARCODE_LOCALIZATION",
                      "ImageParameterName": "IP_0"
                  },
                  {
                      "Section": "ST_BARCODE_DECODING",
                      "ImageParameterName": "IP_0"
                  }
              ]
          }
      ],
      "ImageParameterOptions": [
          {
              "Name": "IP_0",
              "TextureDetectionModes": [
                  {
                      "Mode": "TDM_GENERAL_WIDTH_CONCENTRATION",
                      "Sensitivity": 5
                  }
              ]
          }
      ]
  }

apply settings by calling method InitSettingsFromFile

JavaScript
C++
Android
Objective-C
Swift

// `router` is an instance of `CaptureVisionRouter`.
// In the JS edition, the method name we use for initialization is different.
router.initSettings("PATH-TO-YOUR-SETTING")

char szErrorMsg[256] = {0};
CCaptureVisionRouter* cvr = new CCaptureVisionRouter;
cvr->InitSettingsFromFile("PATH-TO-YOUR-SETTING-FILE", szErrorMsg, 256);
// more process here

try {
   // `cvr` is an instance of `CaptureVisionRouter`.
   cvr.initSettingsFromFile("PATH-TO-YOUR-SETTING-FILE");
} catch (CaptureVisionRouterException e) {
   e.printStackTrace();
}

NSError *error;
// `cvr` is an instance of `DSCaptureVisionRouter`.
[self.cvr initSettingsFromFile:@"PATH-TO-YOUR-SETTING-FILE" error:&error];

do{
   //`cvr` is an instance of `CaptureVisionRouter`.
   try cvr.initSettingsFromFile("PATH-TO-YOUR-SETTING-FILE")
}catch{
   // Add code to do when error occurs.
}