RPA Robotic Process Automation - Select Region And Perform OCR - C# - ByteScout

RPA Robotic Process Automation – Select Region And Perform OCR – C#

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How to select region and perform OCR in C# with ByteScout Robotic Process Automation

ByteScout Robotic Process Automation: components and tools for quick RPA (Robotic Process Automation) implementation.

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Form1.Designer.cs

      
namespace SelectRegionAndPerformOCR { partial class Form1 { /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// Clean up any resources being used. /// </summary> /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1)); this.toolStrip1 = new System.Windows.Forms.ToolStrip(); this.toolStripButton1 = new System.Windows.Forms.ToolStripButton(); this.pdfViewerControl1 = new Bytescout.PDFViewer.PDFViewerControl(); this.btnRunOCR = new System.Windows.Forms.Button(); this.label1 = new System.Windows.Forms.Label(); this.toolStrip1.SuspendLayout(); this.SuspendLayout(); // // toolStrip1 // this.toolStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] { this.toolStripButton1}); this.toolStrip1.Location = new System.Drawing.Point(0, 0); this.toolStrip1.Name = "toolStrip1"; this.toolStrip1.Size = new System.Drawing.Size(971, 25); this.toolStrip1.TabIndex = 0; this.toolStrip1.Text = "toolStrip1"; // // toolStripButton1 // this.toolStripButton1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point); this.toolStripButton1.Image = ((System.Drawing.Image)(resources.GetObject("toolStripButton1.Image"))); this.toolStripButton1.ImageTransparentColor = System.Drawing.Color.Magenta; this.toolStripButton1.Name = "toolStripButton1"; this.toolStripButton1.Size = new System.Drawing.Size(114, 22); this.toolStripButton1.Text = "Load document"; this.toolStripButton1.Click += new System.EventHandler(this.toolStripButton1_Click); // // pdfViewerControl1 // this.pdfViewerControl1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right))); this.pdfViewerControl1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle; this.pdfViewerControl1.Location = new System.Drawing.Point(12, 28); this.pdfViewerControl1.MouseMode = Bytescout.PDFViewer.MouseMode.Selection; this.pdfViewerControl1.Name = "pdfViewerControl1"; this.pdfViewerControl1.RegistrationKey = null; this.pdfViewerControl1.RegistrationName = null; this.pdfViewerControl1.ResetRotationOnPageChange = false; this.pdfViewerControl1.Scale = 100; this.pdfViewerControl1.SelectionColor = System.Drawing.Color.Red; this.pdfViewerControl1.ShowImageObjects = true; this.pdfViewerControl1.ShowTextObjects = true; this.pdfViewerControl1.ShowVectorObjects = true; this.pdfViewerControl1.Size = new System.Drawing.Size(766, 490); this.pdfViewerControl1.TabIndex = 1; // // btnRunOCR // this.btnRunOCR.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right))); this.btnRunOCR.Enabled = false; this.btnRunOCR.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point); this.btnRunOCR.Location = new System.Drawing.Point(784, 77); this.btnRunOCR.Name = "btnRunOCR"; this.btnRunOCR.Size = new System.Drawing.Size(175, 39); this.btnRunOCR.TabIndex = 2; this.btnRunOCR.Text = "Run OCR"; this.btnRunOCR.UseVisualStyleBackColor = true; this.btnRunOCR.Click += new System.EventHandler(this.btnRunOCR_Click); // // label1 // this.label1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right))); this.label1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point); this.label1.Location = new System.Drawing.Point(784, 28); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(175, 46); this.label1.TabIndex = 3; this.label1.Text = "Load document, select region and press \"Run OCR\" button"; // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(971, 530); this.Controls.Add(this.label1); this.Controls.Add(this.btnRunOCR); this.Controls.Add(this.pdfViewerControl1); this.Controls.Add(this.toolStrip1); this.Name = "Form1"; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; this.Text = "Form1"; this.toolStrip1.ResumeLayout(false); this.toolStrip1.PerformLayout(); this.ResumeLayout(false); this.PerformLayout(); } #endregion private System.Windows.Forms.ToolStrip toolStrip1; private System.Windows.Forms.ToolStripButton toolStripButton1; private Bytescout.PDFViewer.PDFViewerControl pdfViewerControl1; private System.Windows.Forms.Button btnRunOCR; private System.Windows.Forms.Label label1; } }

Form1.cs

      
using System; using System.Drawing; using System.Windows.Forms; using Bytescout.PDFExtractor; namespace SelectRegionAndPerformOCR { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void toolStripButton1_Click(object sender, EventArgs e) { using (OpenFileDialog openFileDialog = new OpenFileDialog()) { openFileDialog.Title = @"Open Document"; openFileDialog.Filter = @"All Supported Formats|*.pdf;*.jpg;*.jpeg;*.png;*.tif;*.tiff;*.bmp|PDF Files (*.pdf)|*.pdf|Image Files (*.jpg;*.png;*.tif;*.tiff;*.bmp)|*.jpg;*.jpeg;*.png;*.tif;*.tiff;*.bmp|All Files|*.*"; if (openFileDialog.ShowDialog() == DialogResult.OK) { pdfViewerControl1.InputFile = openFileDialog.FileName; btnRunOCR.Enabled = true; } } } private void btnRunOCR_Click(object sender, EventArgs e) { TextExtractor extractor = new TextExtractor(); extractor.RegistrationName = "demo"; extractor.RegistrationKey = "demo"; // Load sample PDF document extractor.LoadDocumentFromFile(pdfViewerControl1.InputFile); // Enable Optical Character Recognition (OCR) // in .Auto mode (SDK automatically checks if needs to use OCR or not) extractor.OCRMode = OCRMode.Auto; // Set the location of "tessdata" folder containing language data files extractor.OCRLanguageDataFolder = @"c:\Program Files\Bytescout PDF Extractor SDK\net4.00\tessdata\"; // Set OCR language extractor.OCRLanguage = "eng"; // "eng" for english, "deu" for German, "fra" for French, "spa" for Spanish etc - according to files in /tessdata // Find more language files at https://github.com/tesseract-ocr/tessdata/tree/3.04.00 // Set PDF document rendering resolution extractor.OCRResolution = 300; // Set the extraction area to the viewer's selection rectangle RectangleF[] selection = pdfViewerControl1.SelectionInPoints; if (selection.Length > 0) extractor.SetExtractionArea(selection[0]); // Show wait cursor Cursor = Cursors.WaitCursor; try { // Perform OCR and save result to file extractor.SavePageTextToFile(pdfViewerControl1.CurrentPageIndex, "result.txt"); } finally { // Revert cursor to default Cursor = Cursors.Default; } // Cleanup extractor.Dispose(); // Open output file in default associated application System.Diagnostics.Process.Start("result.txt"); } } }

Program.cs

      
using System; using System.Collections.Generic; using System.Linq; using System.Windows.Forms; namespace SelectRegionAndPerformOCR { static class Program { /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); } } }

SelectRegionAndPerformOCR.csproj

      
<?xml version="1.0" encoding="utf-8"?> <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" /> <PropertyGroup> <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> <ProjectGuid>{6A7F695C-A9C0-4A00-8E07-57DBB26EB5EB}</ProjectGuid> <OutputType>WinExe</OutputType> <RootNamespace>SelectRegionAndPerformOCR</RootNamespace> <AssemblyName>SelectRegionAndPerformOCR</AssemblyName> <TargetFrameworkVersion>v4.0</TargetFrameworkVersion> <FileAlignment>512</FileAlignment> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <PlatformTarget>AnyCPU</PlatformTarget> <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' "> <PlatformTarget>AnyCPU</PlatformTarget> <DebugType>pdbonly</DebugType> <Optimize>true</Optimize> <OutputPath>bin\Release\</OutputPath> <DefineConstants>TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <ItemGroup> <Reference Include="Bytescout.PDFExtractor, Version=9.1.0.3170, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>..\..\..\Program Files\Bytescout PDF Extractor SDK\net4.00\Bytescout.PDFExtractor.dll</HintPath> </Reference> <Reference Include="Bytescout.PDFExtractor.OCRExtension, Version=9.1.0.3170, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>..\..\..\Program Files\Bytescout PDF Extractor SDK\net4.00\Bytescout.PDFExtractor.OCRExtension.dll</HintPath> </Reference> <Reference Include="Bytescout.PDFViewer, Version=9.1.0.3170, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>..\..\..\Program Files\Bytescout PDF Viewer SDK\net4.00\Bytescout.PDFViewer.dll</HintPath> </Reference> <Reference Include="System" /> <Reference Include="System.Core" /> <Reference Include="System.Xml.Linq" /> <Reference Include="System.Data" /> <Reference Include="System.Deployment" /> <Reference Include="System.Drawing" /> <Reference Include="System.Windows.Forms" /> <Reference Include="System.Xml" /> </ItemGroup> <ItemGroup> <Compile Include="Form1.cs"> <SubType>Form</SubType> </Compile> <Compile Include="Form1.Designer.cs"> <DependentUpon>Form1.cs</DependentUpon> </Compile> <Compile Include="Program.cs" /> <Compile Include="Properties\AssemblyInfo.cs" /> <EmbeddedResource Include="Form1.resx"> <DependentUpon>Form1.cs</DependentUpon> </EmbeddedResource> <EmbeddedResource Include="Properties\Resources.resx"> <Generator>ResXFileCodeGenerator</Generator> <LastGenOutput>Resources.Designer.cs</LastGenOutput> <SubType>Designer</SubType> </EmbeddedResource> <Compile Include="Properties\Resources.Designer.cs"> <AutoGen>True</AutoGen> <DependentUpon>Resources.resx</DependentUpon> </Compile> <None Include="Properties\Settings.settings"> <Generator>SettingsSingleFileGenerator</Generator> <LastGenOutput>Settings.Designer.cs</LastGenOutput> </None> <Compile Include="Properties\Settings.Designer.cs"> <AutoGen>True</AutoGen> <DependentUpon>Settings.settings</DependentUpon> <DesignTimeSharedInput>True</DesignTimeSharedInput> </Compile> </ItemGroup> <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" /> </Project>

SelectRegionAndPerformOCR.sln

      
Microsoft Visual Studio Solution File, Format Version 12.00 # Visual Studio 15 VisualStudioVersion = 15.0.27703.2047 MinimumVisualStudioVersion = 10.0.40219.1 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SelectRegionAndPerformOCR", "SelectRegionAndPerformOCR.csproj", "{6A7F695C-A9C0-4A00-8E07-57DBB26EB5EB}" EndProject Global GlobalSection(SolutionConfigurationPlatforms) = preSolution Debug|Any CPU = Debug|Any CPU Release|Any CPU = Release|Any CPU EndGlobalSection GlobalSection(ProjectConfigurationPlatforms) = postSolution {6A7F695C-A9C0-4A00-8E07-57DBB26EB5EB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU {6A7F695C-A9C0-4A00-8E07-57DBB26EB5EB}.Debug|Any CPU.Build.0 = Debug|Any CPU {6A7F695C-A9C0-4A00-8E07-57DBB26EB5EB}.Release|Any CPU.ActiveCfg = Release|Any CPU {6A7F695C-A9C0-4A00-8E07-57DBB26EB5EB}.Release|Any CPU.Build.0 = Release|Any CPU EndGlobalSection GlobalSection(SolutionProperties) = preSolution HideSolutionNode = FALSE EndGlobalSection GlobalSection(ExtensibilityGlobals) = postSolution SolutionGuid = {B4740E27-9001-4E5D-AABF-0EE4D43A2AC8} EndGlobalSection EndGlobal

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