Add new OCR sample.

Also, update markdown.
datalogics · Jan 22, 2025 · 21a197c · 21a197c
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diff --git a/OpticalCharacterRecognition/OCRDocument/App.config b/OpticalCharacterRecognition/OCRDocument/App.config
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
+    </startup>
+</configuration>
diff --git a/OpticalCharacterRecognition/OCRDocument/OCRDocument.cs b/OpticalCharacterRecognition/OCRDocument/OCRDocument.cs
@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using Datalogics.PDFL;
+
+/*
+ * Runs OCR on the document recognizing text found on its rasterized pages.
+ * 
+ * Copyright (c) 2007-2025, Datalogics, Inc. All rights reserved.
+ *
+ */
+
+namespace OCRDocument
+{
+    class OCRDocument
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("OCRDocument Sample:");
+
+
+            using (Library lib = new Library())
+            {
+                Console.WriteLine("Initialized the library.");
+
+                String sInput = Library.ResourceDirectory + "Sample_Input/scanned_images.pdf";
+                String sOutput = "OCRDocument-out.pdf";
+
+                if (args.Length > 0)
+                    sInput = args[0];
+                if (args.Length > 1)
+                    sOutput = args[1];
+
+                Console.WriteLine("Input file: " + sInput);
+                Console.WriteLine("Writing output to: " + sOutput);
+
+                OCRParams ocrParams = new OCRParams();
+                //The OCRParams.Languages parameter controls which languages the OCR engine attempts
+                //to detect. By default the OCR engine searches for English.
+                List<LanguageSetting> langList = new List<LanguageSetting>();
+                LanguageSetting languageOne = new LanguageSetting(Language.English, false);
+                langList.Add(languageOne);
+
+                //You could add additional languages for the OCR engine to detect by adding 
+                //more entries to the LanguageSetting list. 
+
+                //LanguageSetting languageTwo = new LanguageSetting(Language.Japanese, false);
+                //langList.Add(languageTwo);
+                ocrParams.Languages = langList;
+
+                // If the resolution for the images in your document are not
+                // 300 dpi, specify a default resolution here. Specifying a
+                // correct resolution gives better results for OCR, especially
+                // with automatic image preprocessing.
+                // ocrParams.Resolution = 600;
+
+                using (OCREngine ocrEngine = new OCREngine(ocrParams))
+                {
+                    //Create a document object using the input file
+                    using (Document doc = new Document(sInput))
+                    {
+                        for (int numPage = 0; numPage < doc.NumPages; numPage++)
+                        {
+                            using (Page page = doc.GetPage(numPage))
+                            {
+                                page.OCRPageContents(doc, ocrEngine);
+                            }
+                        }
+
+                        doc.Save(SaveFlags.Full, sOutput);
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/OpticalCharacterRecognition/OCRDocument/OCRDocument.csproj b/OpticalCharacterRecognition/OCRDocument/OCRDocument.csproj
@@ -0,0 +1,58 @@
+<?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)' == '' ">x64</Platform>
+    <ProjectGuid>{C9DD37F3-545F-4346-8EF2-FAE2DD20FDCF}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>OCRDocument</RootNamespace>
+    <AssemblyName>OCRDocument</AssemblyName>
+    <TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <Deterministic>true</Deterministic>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x64' ">
+    <PlatformTarget>x64</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>..\..\..\dle\build\win-x86-64\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x64' ">
+    <PlatformTarget>x64</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Adobe.PDF.Library.LM.NETFramework">
+      <Version>18.*</Version>
+    </PackageReference>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="OCRDocument.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>
diff --git a/OpticalCharacterRecognition/OCRDocument/OCRDocument.sln b/OpticalCharacterRecognition/OCRDocument/OCRDocument.sln
@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.33328.57
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OCRDocument", "OCRDocument.csproj", "{C9DD37F3-545F-4346-8EF2-FAE2DD20FDCF}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Release|x64 = Release|x64
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{C9DD37F3-545F-4346-8EF2-FAE2DD20FDCF}.Debug|x64.ActiveCfg = Debug|x64
+		{C9DD37F3-545F-4346-8EF2-FAE2DD20FDCF}.Debug|x64.Build.0 = Debug|x64
+		{C9DD37F3-545F-4346-8EF2-FAE2DD20FDCF}.Release|x64.ActiveCfg = Release|x64
+		{C9DD37F3-545F-4346-8EF2-FAE2DD20FDCF}.Release|x64.Build.0 = Release|x64
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {CEA60573-4A7F-49A3-8EC5-6DCC54E2E30B}
+	EndGlobalSection
+EndGlobal
diff --git a/OpticalCharacterRecognition/OCRDocument/Properties/AssemblyInfo.cs b/OpticalCharacterRecognition/OCRDocument/Properties/AssemblyInfo.cs
@@ -0,0 +1,33 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("OCRDocument")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("Datalogics, Inc.")]
+[assembly: AssemblyProduct("OCRDocument")]
+[assembly: AssemblyCopyright("Copyright © Datalogics 2019-2025")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("a1a2f184-6250-4843-8d6b-3a72776dd27d")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/OpticalCharacterRecognition/README.md b/OpticalCharacterRecognition/README.md
@@ -3,3 +3,6 @@ Places recognized text behind the OCR images found on a PDF page.
 
 ## ***AddTextToImage***
 Adds an image file to a PDF page, runs OCR on the image, and place the recognized text behind it.
+
+## ***OCRDocument***
+Runs OCR on the document recognizing text found on its rasterized pages.