Decode Unreadable Barcodes with Dynamsoft Barcode Reader's Custom Scan Parameters
Binarized image produced by Dynamsoft Barcode Reader:
JSON Template (help):
Issue:
In strong light, the barcodes may be overexposed. The bars become difficult to read.
Solution:
Dynamsoft Barcode Reader provides an adaptive binarization mode (BM_LOCAL_BLOCK). We can configure different block sizes to keep the barcode details in strong light after binarization.
{
"BarcodeFormatSpecificationOptions": [
{
"AllModuleDeviation": 0,
"AustralianPostEncodingTable": "C",
"BarcodeAngleRangeArray": null,
"BarcodeBytesLengthRangeArray": null,
"BarcodeComplementModes": null,
"BarcodeFormatIds": [
"BF_PDF417",
"BF_QR_CODE",
"BF_DATAMATRIX",
"BF_AZTEC",
"BF_MICRO_QR",
"BF_MICRO_PDF417",
"BF_DOTCODE"
],
"BarcodeHeightRangeArray": null,
"BarcodeTextLengthRangeArray": null,
"BarcodeTextRegExPattern": "",
"BarcodeWidthRangeArray": null,
"BarcodeZoneBarCountRangeArray": null,
"BarcodeZoneMinDistanceToImageBorders": 0,
"BaseBarcodeFormatSpecification": "",
"Code128Subset": "",
"DeformationResistingModes": null,
"EnableAddOnCode": 0,
"EnableDataMatrixECC000-140": 0,
"EnableQRCodeModel1": 0,
"FindUnevenModuleBarcode": 1,
"HeadModuleRatio": "",
"MSICodeCheckDigitCalculation": "MSICCDC_MOD_10",
"MinQuietZoneWidth": 4,
"MinRatioOfBarcodeZoneWidthToHeight": 0,
"MinResultConfidence": 30,
"MirrorMode": "MM_BOTH",
"ModuleSizeRangeArray": null,
"Name": "bfs1",
"PartitionModes": [
"PM_WHOLE_BARCODE",
"PM_ALIGNMENT_PARTITION"
],
"PatchCodeSearchingMargins": {
"Bottom": 20,
"Left": 20,
"MeasuredByPercentage": 1,
"Right": 20,
"Top": 20
},
"RequireStartStopChars": 1,
"ReturnPartialBarcodeValue": 1,
"StandardFormat": "",
"TailModuleRatio": "",
"VerifyCheckDigit": 0
},
{
"AllModuleDeviation": 0,
"AustralianPostEncodingTable": "C",
"BarcodeAngleRangeArray": null,
"BarcodeBytesLengthRangeArray": null,
"BarcodeComplementModes": null,
"BarcodeFormatIds": [
"BF_ALL"
],
"BarcodeHeightRangeArray": null,
"BarcodeTextLengthRangeArray": null,
"BarcodeTextRegExPattern": "",
"BarcodeWidthRangeArray": null,
"BarcodeZoneBarCountRangeArray": null,
"BarcodeZoneMinDistanceToImageBorders": 0,
"BaseBarcodeFormatSpecification": "",
"Code128Subset": "",
"DeformationResistingModes": null,
"EnableAddOnCode": 0,
"EnableDataMatrixECC000-140": 0,
"EnableQRCodeModel1": 0,
"FindUnevenModuleBarcode": 1,
"HeadModuleRatio": "",
"MSICodeCheckDigitCalculation": "MSICCDC_MOD_10",
"MinQuietZoneWidth": 4,
"MinRatioOfBarcodeZoneWidthToHeight": 0,
"MinResultConfidence": 30,
"MirrorMode": "MM_NORMAL",
"ModuleSizeRangeArray": null,
"Name": "bfs2",
"PartitionModes": [
"PM_WHOLE_BARCODE",
"PM_ALIGNMENT_PARTITION"
],
"PatchCodeSearchingMargins": {
"Bottom": 20,
"Left": 20,
"MeasuredByPercentage": 1,
"Right": 20,
"Top": 20
},
"RequireStartStopChars": 1,
"ReturnPartialBarcodeValue": 1,
"StandardFormat": "",
"TailModuleRatio": "",
"VerifyCheckDigit": 0
}
],
"BarcodeReaderTaskSettingOptions": [
{
"BarcodeColourModes": null,
"BarcodeComplementModes": [
{
"Mode": "BCM_SKIP"
}
],
"BarcodeFormatIds": [
"BF_ONED",
"BF_PDF417",
"BF_QR_CODE",
"BF_DATAMATRIX",
"BF_MICRO_QR",
"BF_MICRO_PDF417"
],
"BarcodeFormatSpecificationNameArray": [
"bfs1",
"bfs2"
],
"BaseBarcodeReaderTaskSettingName": "",
"DPMCodeReadingModes": [
{
"BarcodeFormat": "BF_DATAMATRIX",
"Mode": "DPMCRM_SKIP"
}
],
"DeblurModes": null,
"DeformationResistingModes": [
{
"BinarizationMode": {
"BinarizationThreshold": -1,
"BlockSizeX": 0,
"BlockSizeY": 0,
"EnableFillBinaryVacancy": 1,
"GrayscaleEnhancementModesIndex": -1,
"Mode": "BM_LOCAL_BLOCK",
"MorphOperation": "Close",
"MorphOperationKernelSizeX": -1,
"MorphOperationKernelSizeY": -1,
"MorphShape": "Rectangle",
"ThresholdCompensation": 10
},
"GrayscaleEnhancementMode": {
"Mode": "GEM_AUTO",
"Sensitivity": -1,
"SharpenBlockSizeX": -1,
"SharpenBlockSizeY": -1,
"SmoothBlockSizeX": -1,
"SmoothBlockSizeY": -1
},
"Level": 5,
"Mode": "DRM_SKIP"
}
],
"ExpectedBarcodesCount": 999,
"LocalizationModes": [
{
"ConfidenceThreshold": 60,
"IsOneDStacked": 0,
"Mode": "LM_CONNECTED_BLOCKS",
"ModuleSize": 0,
"ScanDirection": 0,
"ScanStride": 0
},
{
"ConfidenceThreshold": 60,
"IsOneDStacked": 0,
"Mode": "LM_SCAN_DIRECTLY",
"ModuleSize": 0,
"ScanDirection": 0,
"ScanStride": 0
},
{
"ConfidenceThreshold": 60,
"IsOneDStacked": 0,
"Mode": "LM_STATISTICS",
"ModuleSize": 0,
"ScanDirection": 0,
"ScanStride": 0
},
{
"ConfidenceThreshold": 60,
"IsOneDStacked": 0,
"Mode": "LM_LINES",
"ModuleSize": 0,
"ScanDirection": 0,
"ScanStride": 0
}
],
"MaxThreadsInOneTask": 4,
"Name": "task-read-barcodes",
"ReturnBarcodeZoneClarity": 0,
"SectionImageParameterArray": [
{
"ContinueWhenPartialResultsGenerated": 1,
"ImageParameterName": "ip-read-barcodes",
"Section": "ST_REGION_PREDETECTION"
},
{
"ContinueWhenPartialResultsGenerated": 1,
"ImageParameterName": "ip-read-barcodes",
"Section": "ST_BARCODE_LOCALIZATION"
},
{
"ContinueWhenPartialResultsGenerated": 1,
"ImageParameterName": "ip-read-barcodes",
"Section": "ST_BARCODE_DECODING"
}
],
"StartSection": "ST_REGION_PREDETECTION",
"TerminateSetting": {
"Section": "ST_NULL",
"Stage": "IRUT_NULL"
},
"TextResultOrderModes": [
{
"Mode": "TROM_CONFIDENCE"
},
{
"Mode": "TROM_POSITION"
},
{
"Mode": "TROM_FORMAT"
}
]
}
],
"CaptureVisionTemplates": [
{
"ImageROIProcessingNameArray": [
"roi-read-barcodes"
],
"ImageSource": "",
"MaxParallelTasks": 4,
"MinImageCaptureInterval": 0,
"Name": "Default_1",
"OutputOriginalImage": 0,
"SemanticProcessingNameArray": null,
"Timeout": 10000
}
],
"GlobalParameter": {
"MaxTotalImageDimension": 0
},
"ImageParameterOptions": [
{
"BaseImageParameterName": "",
"BinarizationModes": [
{
"BinarizationThreshold": -1,
"BlockSizeX": 0,
"BlockSizeY": 0,
"EnableFillBinaryVacancy": 1,
"GrayscaleEnhancementModesIndex": -1,
"Mode": "BM_LOCAL_BLOCK",
"MorphOperation": "Close",
"MorphOperationKernelSizeX": -1,
"MorphOperationKernelSizeY": -1,
"MorphShape": "Rectangle",
"ThresholdCompensation": 10
},
{
"BinarizationThreshold": -1,
"BlockSizeX": 61,
"BlockSizeY": 61,
"EnableFillBinaryVacancy": 1,
"GrayscaleEnhancementModesIndex": -1,
"Mode": "BM_LOCAL_BLOCK",
"MorphOperation": "Close",
"MorphOperationKernelSizeX": -1,
"MorphOperationKernelSizeY": -1,
"MorphShape": "Rectangle",
"ThresholdCompensation": 0
}
],
"ColourConversionModes": [
{
"BlueChannelWeight": -1,
"GreenChannelWeight": -1,
"Mode": "CICM_GENERAL",
"RedChannelWeight": -1,
"ReferChannel": "H_CHANNEL"
}
],
"GrayscaleEnhancementModes": [
{
"Mode": "GEM_GENERAL",
"Sensitivity": -1,
"SharpenBlockSizeX": -1,
"SharpenBlockSizeY": -1,
"SmoothBlockSizeX": -1,
"SmoothBlockSizeY": -1
}
],
"GrayscaleTransformationModes": [
{
"Mode": "GTM_ORIGINAL"
},
{
"Mode": "GTM_INVERTED"
}
],
"IfEraseTextZone": 1,
"Name": "ip-read-barcodes",
"RegionPredetectionModes": [
{
"AspectRatioRange": "[]",
"FindAccurateBoundary": 0,
"ForeAndBackgroundColours": "[]",
"HeightRange": "[]",
"ImageParameterName": "",
"MeasuredByPercentage": 1,
"MinImageDimension": 262144,
"Mode": "RPM_GENERAL",
"RelativeRegions": "[]",
"Sensitivity": 1,
"SpatialIndexBlockSize": 5,
"WidthRange": "[]"
}
],
"ScaleDownThreshold": 2300,
"ScaleUpModes": [
{
"AcuteAngleWithXThreshold": -1,
"LetterHeightThreshold": 0,
"Mode": "SUM_AUTO",
"ModuleSizeThreshold": 0,
"TargetLetterHeight": 0,
"TargetModuleSize": 0
}
],
"TextDetectionMode": {
"CharHeightRange": [
1,
1000,
1
],
"Direction": "UNKNOWN",
"MaxSpacingInALine": -1,
"Mode": "TTDM_LINE",
"Sensitivity": 3,
"StringLengthRange": null
},
"TextureDetectionModes": [
{
"Mode": "TDM_GENERAL_WIDTH_CONCENTRATION",
"Sensitivity": 5
}
]
}
],
"TargetROIDefOptions": [
{
"BaseTargetROIDefName": "",
"Location": {
"Offset": {
"FirstPoint": [
0,
0,
1,
1
],
"FourthPoint": [
0,
100,
1,
1
],
"MeasuredByPercentage": 1,
"ReferenceObjectOriginIndex": 0,
"ReferenceObjectType": "ROT_ATOMIC_OBJECT",
"ReferenceXAxis": {
"AxisType": "AT_MIDPOINT_EDGE",
"EdgeIndex": 0,
"LengthReference": "LR_X",
"RotationAngle": 90
},
"ReferenceYAxis": {
"AxisType": "AT_MIDPOINT_EDGE",
"EdgeIndex": 1,
"LengthReference": "LR_Y",
"RotationAngle": 90
},
"SecondPoint": [
100,
0,
1,
1
],
"ThirdPoint": [
100,
100,
1,
1
]
}
},
"Name": "roi-read-barcodes",
"PauseFlag": 0,
"TaskSettingNameArray": [
"task-read-barcodes"
]
}
]
}
Image Source:
Muenster Barcode DB
Single
Clean
Uneven lighting
Other
OneDQR Code
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