How to Read Barcodes from Large Images

In some cases, the captured image is very large, so Dynamsoft Barcode Reader (DBR) may require more memory and take longer to read the barcode. To speed up the barcode localization process and reduce memory overhead, you can configure the ImageScaleSetting parameter to shrink the image size.

Note:

Don’t worry about the location of the barcodes, as DBR will still return their coordinates in the original image.

Example

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

• Update parameter ImageScaleSetting in your JSON template

    {
        "CaptureVisionTemplates": [
            {
                "Name": "CV_0",
                "ImageROIProcessingNameArray": ["TA_0" ]
            }       
        ],
        "TargetROIDefOptions" : [
            {
                "Name": "TA_0",
                "TaskSettingNameArray": [ "BR_0" ]
            }
        ],
        "BarcodeReaderTaskSettingOptions": [
            {
                "Name" : "BR_0",
                "SectionArray": [
                    {
                        "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",
                "ApplicableStages":[
                    { 
                        "Stage": "SST_SCALE_IMAGE",
                        "ImageScaleSetting": {
                            "ScaleType": "ST_SCALE_DOWN",
                            "ReferenceEdge": "RE_SHORTER_EDGE",
                            "EdgeLengthThreshold": 1600
                        }
                    }
                ]
            }
        ]
    }
  

• Apply the above settings following the article Use Templates for Configuring Parameters.