ByteScout Data Extraction Suite – VBScript – Barcode image preprocessing filters with barcode reader sdk

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ByteScout Data Extraction Suite – VBScript – Barcode image preprocessing filters with barcode reader sdk

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ByteScout-Data-Extraction-Suite-VBScript-Barcode-image-preprocessing-filters-with-barcode-reader-sdk.pdf

barcode image preprocessing filters with barcode reader sdk in VBScript using ByteScout Data Extraction Suite

Learn to code in VBScript to make barcode image preprocessing filters with barcode reader sdk with this simple How-To tutorial

Every ByteScout tool includes sampleVBScript source codes that you can find here or in the folder with installed ByteScout product. ByteScout Data Extraction Suite was created to assist barcode image preprocessing filters with barcode reader sdk in VBScript. ByteScout Data Extraction Suite is the set that includes 3 SDK products for data extraction from PDF, scans, images and from spreadsheets: PDF Extractor SDK, Data Extraction SDK, Barcode Reader SDK.

This rich and prolific sample source code in VBScript for ByteScout Data Extraction Suite contains various functions and options you should do calling the API to implement barcode image preprocessing filters with barcode reader sdk. If you want to implement this functionality, you should copy and paste code below into your app using code editor. Then compile and run your application. Check these VBScript sample code examples to see if they acknowledge to your needs and requirements for the project.

On our website you may get trial version of ByteScout Data Extraction Suite for free. Source code samples are included to help you with your VBScript application.

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TestBarcodeReading.vbs

      ' This exmaple demonstrates the use of image filters to improve the decoding or speed.

Dim result

Set reader = CreateObject("Bytescout.BarCodeReader.Reader")
reader.RegistrationName = "demo"
reader.RegistrationKey = "demo"

' Set barcode type to find
reader.BarcodeTypesToFind.Code128 = True


' WORKING WITH LOW CONTRAST BARCODE IMAGES

' Add the contrast adjustment for the low contrast image
reader.ImagePreprocessingFilters.AddContrast(40)

result = result & "Image ""low-contrast-barcode.png""" & vbCRLF

reader.ReadFromFile "low-contrast-barcode.png"

If reader.FoundCount = 0 Then
	result = result & "No barcode found!" & vbCRLF
Else
	For i = 0 To reader.FoundCount - 1
        result = result & "Found barcode with type " & CStr(reader.GetFoundBarcodeType(i)) & " and value """ & reader.GetFoundBarcodeValue(i) & """" & vbCRLF
    Next
End If

reader.ImagePreprocessingFilters.Clear()
result = result & vbCRLF


' WORKING WITH NOISY BARCODE IMAGES

' Add the median filter to lower the noise
reader.ImagePreprocessingFilters.AddMedian()

result = result & "Image ""noisy-barcode.png""" & vbCRLF

reader.ReadFromFile "noisy-barcode.png"

If reader.FoundCount = 0 Then
	result = result & "No barcode found!" & vbCRLF
Else
	For i = 0 To reader.FoundCount - 1
        result = result & "Found barcode with type " & CStr(reader.GetFoundBarcodeType(i)) & " and value """ & reader.GetFoundBarcodeValue(i) & """" & vbCRLF
    Next
End If

reader.ImagePreprocessingFilters.Clear()
result = result & vbCRLF


' WORKING WITH DENSE AND ILLEGIBLE BARCODES

' Add the scale filter to enlarge the barcode to make gaps between bars more distinguishable
reader.ImagePreprocessingFilters.AddScale_2(2) ' enlarge twice

result = result & "Image ""too-dense-barcode.png""" & vbCRLF

reader.ReadFromFile "too-dense-barcode.png"

If reader.FoundCount = 0 Then
	result = result & "No barcode found!" & vbCRLF
Else
	For i = 0 To reader.FoundCount - 1
        result = result & "Found barcode with type " & CStr(reader.GetFoundBarcodeType(i)) & " and value """ & reader.GetFoundBarcodeValue(i) & """" & vbCRLF
    Next
End If

reader.ImagePreprocessingFilters.Clear()
result = result & vbCRLF


' REMOVE EMPTY MARGINS FROM IMAGE TO SPEED UP THE PROCESSING

' Add the crop filter to cut off empty margins from the image.
' This will not improve the recognition quality but may speed up the processing 
' if you enabled multiple barcode types to search. 
reader.ImagePreprocessingFilters.AddCropDark()

result = result & "Image ""barcode-with-large-margins.png""" & vbCRLF

reader.ReadFromFile "barcode-with-large-margins.png"

If reader.FoundCount = 0 Then
	result = result & "No barcode found!" & vbCRLF
Else
	For i = 0 To reader.FoundCount - 1
        result = result & "Found barcode with type " & CStr(reader.GetFoundBarcodeType(i)) & " and value """ & reader.GetFoundBarcodeValue(i) & """" & vbCRLF
    Next
End If

reader.ImagePreprocessingFilters.Clear()
result = result & vbCRLF


Msgbox result


Set reader = Nothing