ByteScout PDF Extractor SDK - VB.NET - OCR Modes - ByteScout

ByteScout PDF Extractor SDK – VB.NET – OCR Modes

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OCR modes in VB.NET and ByteScout PDF Extractor SDK

ByteScout PDF Extractor SDK is the Software Development Kit (SDK) that is designed to help developers with data extraction from unstructured documents like pdf, tiff, scans, images, scanned and electronic forms. The library is powered by OCR, computer vision and AI to provide unique functionality like table detection, automatic table structure extraction, data restoration, data restructuring and reconstruction. Supports PDF, TIFF, PNG, JPG images as input and can output CSV, XML, JSON formatted data. Includes full set of utilities like pdf splitter, pdf merger, searchable pdf maker.

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OCRModes.VS2005.vbproj
      
<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <PropertyGroup> <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> <ProductVersion>8.0.50727</ProductVersion> <SchemaVersion>2.0</SchemaVersion> <ProjectGuid>{393E826B-A9B3-4E6A-AD48-6C790AFF8283}</ProjectGuid> <OutputType>Exe</OutputType> <AppDesignerFolder>Properties</AppDesignerFolder> <RootNamespace>OCRModes</RootNamespace> <AssemblyName>OCRModes</AssemblyName> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <DebugSymbols>true</DebugSymbols> <DebugType>full</DebugType> <Optimize>false</Optimize> <OutputPath>bin\Debug\</OutputPath> <DefineConstants>DEBUG,TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> <DebugType>pdbonly</DebugType> <Optimize>true</Optimize> <OutputPath>bin\Release\</OutputPath> <DefineConstants>TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <Import Project="$(MSBuildBinPath)\Microsoft.VisualBasic.Targets" /> <ItemGroup> <Import Include="Microsoft.VisualBasic" /> <Import Include="System" /> <Reference Include="Bytescout.PDFExtractor, Version=4.0.0.1542, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="Bytescout.PDFExtractor.OCRExtension, Version=4.0.0.1542, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="System" /> <Reference Include="System.Data" /> <Reference Include="System.Drawing" /> <Reference Include="System.Xml" /> <Compile Include="Program.vb" /> <Compile Include="Properties\AssemblyInfo.vb" /> <Content Include="..\..\SampleWith_Vector_Image_Font.pdf"> <CopyToOutputDirectory>Always</CopyToOutputDirectory> <Link>SampleWith_Vector_Image_Font.pdf</Link> </Content> </ItemGroup> </Project>

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OCRModes.VS2008.vbproj
      
<Project ToolsVersion="3.5" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <PropertyGroup> <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> <ProductVersion>8.0.50727</ProductVersion> <SchemaVersion>2.0</SchemaVersion> <ProjectGuid>{393E826B-A9B3-4E6A-AD48-6C790AFF8283}</ProjectGuid> <OutputType>Exe</OutputType> <AppDesignerFolder>Properties</AppDesignerFolder> <RootNamespace>OCRModes</RootNamespace> <AssemblyName>OCRModes</AssemblyName> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <DebugSymbols>true</DebugSymbols> <DebugType>full</DebugType> <Optimize>false</Optimize> <OutputPath>bin\Debug\</OutputPath> <DefineConstants>DEBUG,TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> <DebugType>pdbonly</DebugType> <Optimize>true</Optimize> <OutputPath>bin\Release\</OutputPath> <DefineConstants>TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <Import Project="$(MSBuildBinPath)\Microsoft.VisualBasic.Targets" /> <ItemGroup> <Import Include="Microsoft.VisualBasic" /> <Import Include="System" /> <Reference Include="Bytescout.PDFExtractor, Version=4.0.0.1542, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="Bytescout.PDFExtractor.OCRExtension, Version=4.0.0.1542, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="System" /> <Reference Include="System.Data" /> <Reference Include="System.Drawing" /> <Reference Include="System.Xml" /> <Compile Include="Program.vb" /> <Compile Include="Properties\AssemblyInfo.vb" /> <Content Include="..\..\SampleWith_Vector_Image_Font.pdf"> <CopyToOutputDirectory>Always</CopyToOutputDirectory> <Link>SampleWith_Vector_Image_Font.pdf</Link> </Content> </ItemGroup> </Project>

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OCRModes.VS2010.vbproj
      
<?xml version="1.0" encoding="utf-8"?> <Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <PropertyGroup> <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> <SchemaVersion>2.0</SchemaVersion> <ProjectGuid>{393E826B-A9B3-4E6A-AD48-6C790AFF8283}</ProjectGuid> <OutputType>Exe</OutputType> <AppDesignerFolder>Properties</AppDesignerFolder> <RootNamespace>OCRModes</RootNamespace> <AssemblyName>OCRModes</AssemblyName> <TargetFrameworkVersion>v4.0</TargetFrameworkVersion> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <DebugSymbols>true</DebugSymbols> <DebugType>full</DebugType> <Optimize>false</Optimize> <OutputPath>bin\Debug\</OutputPath> <DefineConstants>DEBUG,TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> <DebugType>pdbonly</DebugType> <Optimize>true</Optimize> <OutputPath>bin\Release\</OutputPath> <DefineConstants>TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <Import Project="$(MSBuildToolsPath)\Microsoft.VisualBasic.Targets" /> <ItemGroup> <Import Include="Microsoft.VisualBasic" /> <Import Include="System" /> <Reference Include="Bytescout.PDFExtractor, Version=4.0.0.1542, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="Bytescout.PDFExtractor.OCRExtension, Version=4.0.0.1542, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="System" /> <Reference Include="System.Data" /> <Reference Include="System.Drawing" /> <Reference Include="System.Xml" /> <Compile Include="Program.vb" /> <Compile Include="Properties\AssemblyInfo.vb" /> <Content Include="..\..\SampleWith_Vector_Image_Font.pdf"> <CopyToOutputDirectory>Always</CopyToOutputDirectory> <Link>SampleWith_Vector_Image_Font.pdf</Link> </Content> </ItemGroup> </Project>

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OCRModes.VS2012.vbproj
      
<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <PropertyGroup> <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> <SchemaVersion>2.0</SchemaVersion> <ProjectGuid>{393E826B-A9B3-4E6A-AD48-6C790AFF8283}</ProjectGuid> <OutputType>Exe</OutputType> <AppDesignerFolder>Properties</AppDesignerFolder> <RootNamespace>OCRModes</RootNamespace> <AssemblyName>OCRModes</AssemblyName> <TargetFrameworkVersion>v4.0</TargetFrameworkVersion> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <DebugSymbols>true</DebugSymbols> <DebugType>full</DebugType> <Optimize>false</Optimize> <OutputPath>bin\Debug\</OutputPath> <DefineConstants>DEBUG,TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> <DebugType>pdbonly</DebugType> <Optimize>true</Optimize> <OutputPath>bin\Release\</OutputPath> <DefineConstants>TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <Import Project="$(MSBuildToolsPath)\Microsoft.VisualBasic.Targets" /> <ItemGroup> <Import Include="Microsoft.VisualBasic" /> <Import Include="System" /> <Reference Include="Bytescout.PDFExtractor, Version=4.0.0.1542, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="Bytescout.PDFExtractor.OCRExtension, Version=4.0.0.1542, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="System" /> <Reference Include="System.Data" /> <Reference Include="System.Drawing" /> <Reference Include="System.Xml" /> <Compile Include="Program.vb" /> <Compile Include="Properties\AssemblyInfo.vb" /> <Content Include="..\..\SampleWith_Vector_Image_Font.pdf"> <CopyToOutputDirectory>Always</CopyToOutputDirectory> <Link>SampleWith_Vector_Image_Font.pdf</Link> </Content> </ItemGroup> </Project>

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OCRModes.VS2013.vbproj
      
<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <PropertyGroup> <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> <SchemaVersion>2.0</SchemaVersion> <ProjectGuid>{393E826B-A9B3-4E6A-AD48-6C790AFF8283}</ProjectGuid> <OutputType>Exe</OutputType> <AppDesignerFolder>Properties</AppDesignerFolder> <RootNamespace>OCRModes</RootNamespace> <AssemblyName>OCRModes</AssemblyName> <TargetFrameworkVersion>v4.5</TargetFrameworkVersion> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <DebugSymbols>true</DebugSymbols> <DebugType>full</DebugType> <Optimize>false</Optimize> <OutputPath>bin\Debug\</OutputPath> <DefineConstants>DEBUG,TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> <DebugType>pdbonly</DebugType> <Optimize>true</Optimize> <OutputPath>bin\Release\</OutputPath> <DefineConstants>TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <Import Project="$(MSBuildToolsPath)\Microsoft.VisualBasic.Targets" /> <ItemGroup> <Import Include="Microsoft.VisualBasic" /> <Import Include="System" /> <Reference Include="Bytescout.PDFExtractor, Version=4.0.0.1542, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="Bytescout.PDFExtractor.OCRExtension, Version=4.0.0.1542, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="System" /> <Reference Include="System.Data" /> <Reference Include="System.Drawing" /> <Reference Include="System.Xml" /> <Compile Include="Program.vb" /> <Compile Include="Properties\AssemblyInfo.vb" /> <Content Include="..\..\SampleWith_Vector_Image_Font.pdf"> <CopyToOutputDirectory>Always</CopyToOutputDirectory> <Link>SampleWith_Vector_Image_Font.pdf</Link> </Content> </ItemGroup> </Project>

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OCRModes.VS2015.vbproj
      
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <PropertyGroup> <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> <SchemaVersion>2.0</SchemaVersion> <ProjectGuid>{393E826B-A9B3-4E6A-AD48-6C790AFF8283}</ProjectGuid> <OutputType>Exe</OutputType> <AppDesignerFolder>Properties</AppDesignerFolder> <RootNamespace>OCRModes</RootNamespace> <AssemblyName>OCRModes</AssemblyName> <TargetFrameworkVersion>v4.5</TargetFrameworkVersion> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <DebugSymbols>true</DebugSymbols> <DebugType>full</DebugType> <Optimize>false</Optimize> <OutputPath>bin\Debug\</OutputPath> <DefineConstants>DEBUG,TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> <DebugType>pdbonly</DebugType> <Optimize>true</Optimize> <OutputPath>bin\Release\</OutputPath> <DefineConstants>TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <Import Project="$(MSBuildToolsPath)\Microsoft.VisualBasic.Targets" /> <ItemGroup> <Import Include="Microsoft.VisualBasic" /> <Import Include="System" /> <Reference Include="Bytescout.PDFExtractor, Version=4.0.0.1542, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="Bytescout.PDFExtractor.OCRExtension, Version=4.0.0.1542, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="System" /> <Reference Include="System.Data" /> <Reference Include="System.Drawing" /> <Reference Include="System.Xml" /> <Compile Include="Program.vb" /> <Compile Include="Properties\AssemblyInfo.vb" /> <Content Include="..\..\SampleWith_Vector_Image_Font.pdf"> <CopyToOutputDirectory>Always</CopyToOutputDirectory> <Link>SampleWith_Vector_Image_Font.pdf</Link> </Content> </ItemGroup> </Project>

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Program.vb
      
Imports Bytescout.PDFExtractor ' To make OCR work you should add the following references to your project: ' 'Bytescout.PDFExtractor.dll', 'Bytescout.PDFExtractor.OCRExtension.dll'. Class Program Friend Shared Sub Main(args As String()) ' Input document Dim inputDocument As String = ".\SampleWith_Vector_Image_Font.pdf" ' Extracting text with different OCRModes ' 1. TextFromImagesOnly (Plain Mode) Console.WriteLine("---------------------------------" + Environment.NewLine + "Extraction Mode: TextFromImagesOnly " + Environment.NewLine + "---------------------------------") Dim resultText As String = _ExtractTextWithSpecificOCRMode(inputDocument, OCRMode.TextFromImagesOnly) Console.WriteLine(resultText) ' 2. TextFromVectorOnly (Plain Mode) Console.WriteLine("---------------------------------" + Environment.NewLine + "Extraction Mode: TextFromVectorOnly " + Environment.NewLine + "---------------------------------") resultText = _ExtractTextWithSpecificOCRMode(inputDocument, OCRMode.TextFromVectorsOnly) Console.WriteLine(resultText) ' 3. TextFromImagesAndFonts (Combined Mode) Console.WriteLine("---------------------------------" + Environment.NewLine + "Extraction Mode: TextFromImagesAndFonts " + Environment.NewLine + "---------------------------------") resultText = _ExtractTextWithSpecificOCRMode(inputDocument, OCRMode.TextFromImagesAndFonts) Console.WriteLine(resultText) ' 4. TextFromImagesAndVectorsAndFonts (Combined Mode) Console.WriteLine("---------------------------------" + Environment.NewLine + "Extraction Mode: TextFromImagesAndVectorsAndFonts " + Environment.NewLine + "---------------------------------") resultText = _ExtractTextWithSpecificOCRMode(inputDocument, OCRMode.TextFromImagesAndVectorsAndFonts) Console.WriteLine(resultText) Console.ReadLine() End Sub ''' <summary> ''' Extract text from document with specific Ocr Mode ''' </summary> Friend Shared Function _ExtractTextWithSpecificOCRMode(inputDocument As String, ocrMode As OCRMode) As String ' Location of OCR language data files Dim ocrLanguageDataFolder As String = "c:\Program Files\Bytescout PDF Extractor SDK\ocrdata_best\" ' OCR language Dim ocrLanguage As String = "eng" ' "eng" for english, "deu" for German, "fra" for French, "spa" for Spanish etc - according to files in "ocrdata" folder ' Find more language files at https://github.com/bytescout/ocrdata/tree/master/ocrdata_best ' Create TextExtractor instance Using textExtractor As TextExtractor = New TextExtractor("demo", "demo") ' Load document to TextExtractor textExtractor.LoadDocumentFromFile(inputDocument) ' Specify Ocr Mode textExtractor.OCRMode = ocrMode ' Ocr language data folder path and language textExtractor.OCRLanguageDataFolder = ocrLanguageDataFolder textExtractor.OCRLanguage = ocrLanguage ' Return extracted text Return textExtractor.GetText() End Using End Function End Class

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