Decode Unreadable Barcodes with Dynamsoft Barcode Reader's Custom Scan Parameters
Binarized image produced by Dynamsoft Barcode Reader:
JSON Template (help):
Issue:
Blurry QR codes and barcodes pose a significant challenge to effective scanning. The images of the codes may be taken in low resolution or motion.
Solution:
There are some parameters we can adjust to improve the reading rate.
- Set DeblurModes to
nullto let the program decide which deblur algorithms to use to read blurred barcodes. - Set the ExpectedBarcodesCount to a higher value like
999so that it will try all the available image processing methods. - Set GrayscaleEnhancementModes to enhance the image.
- Set ScaleUpModes to scale up modules if their size is too small.
{
"BarcodeReaderTaskSettingOptions" :
[
{
"BarcodeColourModes" : null,
"BarcodeComplementModes" :
[
{
"Mode" : "BCM_SKIP"
}
],
"BarcodeFormatIds" :
[
"BF_DEFAULT",
"BF_PATCHCODE"
],
"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" : "BR_1",
"ReturnBarcodeZoneClarity" : 0,
"SectionImageParameterArray" :
[
{
"ContinueWhenPartialResultsGenerated" : 1,
"ImageParameterName" : "IP_1",
"Section" : "ST_REGION_PREDETECTION"
},
{
"ContinueWhenPartialResultsGenerated" : 1,
"ImageParameterName" : "IP_1",
"Section" : "ST_BARCODE_LOCALIZATION"
},
{
"ContinueWhenPartialResultsGenerated" : 1,
"ImageParameterName" : "IP_Decode",
"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_default"
],
"ImageSource" : "",
"MaxParallelTasks" : 4,
"MinImageCaptureInterval" : 0,
"Name" : "Default_1",
"OutputOriginalImage" : 0,
"SemanticProcessingNameArray" : null,
"Timeout" : 99999
}
],
"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
}
],
"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
},
{
"Mode" : "GEM_GRAY_EQUALIZE",
"Sensitivity" : 5,
"SharpenBlockSizeX" : -1,
"SharpenBlockSizeY" : -1,
"SmoothBlockSizeX" : -1,
"SmoothBlockSizeY" : -1
},
{
"Mode" : "GEM_GRAY_SMOOTH",
"Sensitivity" : -1,
"SharpenBlockSizeX" : -1,
"SharpenBlockSizeY" : -1,
"SmoothBlockSizeX" : 3,
"SmoothBlockSizeY" : 3
}
],
"GrayscaleTransformationModes" :
[
{
"Mode" : "GTM_ORIGINAL"
}
],
"IfEraseTextZone" : 1,
"Name" : "IP_1",
"RegionPredetectionModes" :
[
{
"AspectRatioRange" : "[]",
"FindAccurateBoundary" : 0,
"ForeAndBackgroundColours" : "[]",
"HeightRange" : "[]",
"ImageParameterName" : "",
"MeasuredByPercentage" : 1,
"MinImageDimension" : 262144,
"Mode" : "RPM_GENERAL",
"RelativeRegions" : "[]",
"Sensitivity" : 1,
"SpatialIndexBlockSize" : 5,
"WidthRange" : "[]"
}
],
"ScaleDownThreshold" : 2300,
"ScaleUpModes" :
[
{
"AcuteAngleWithXThreshold" : 0,
"LetterHeightThreshold" : 0,
"Mode" : "SUM_LINEAR_INTERPOLATION",
"ModuleSizeThreshold" : 4,
"TargetLetterHeight" : 0,
"TargetModuleSize" : 6
}
],
"TextDetectionMode" :
{
"CharHeightRange" :
[
1,
1000,
1
],
"Direction" : "UNKNOWN",
"MaxSpacingInALine" : -1,
"Mode" : "TTDM_LINE",
"Sensitivity" : 3,
"StringLengthRange" : null
},
"TextureDetectionModes" :
[
{
"Mode" : "TDM_GENERAL_WIDTH_CONCENTRATION",
"Sensitivity" : 5
}
]
},
{
"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
}
],
"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"
}
],
"IfEraseTextZone" : 1,
"Name" : "IP_Decode",
"RegionPredetectionModes" :
[
{
"AspectRatioRange" : "[]",
"FindAccurateBoundary" : 0,
"ForeAndBackgroundColours" : "[]",
"HeightRange" : "[]",
"ImageParameterName" : "",
"MeasuredByPercentage" : 1,
"MinImageDimension" : 262144,
"Mode" : "RPM_GENERAL",
"RelativeRegions" : "[]",
"Sensitivity" : 1,
"SpatialIndexBlockSize" : 5,
"WidthRange" : "[]"
}
],
"ScaleDownThreshold" : 99999,
"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_default",
"PauseFlag" : 0,
"TaskSettingNameArray" :
[
"BR_1"
]
}
]
}
Image Source:
https://boofcv.org/index.php?title=Performance:QrCode
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