The documentation is designed for a specific purpose to help you to apply the features on your side. ByteScout Premium Suite is the set that includes 12 SDK products from ByteScout including tools and components for PDF, barcodes, spreadsheets, screen video recording. It can select region and perform OCR in C#.
Want to save time? You will save a lot of time on writing and testing code as you may just take the C# code from ByteScout Premium Suite for select region and perform OCR below and use it in your application. IF you want to implement the functionality, just copy and paste this code for C# below into your code editor with your app, compile and run your application. Enjoy writing a code with ready-to-use sample C# codes.
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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;
}
}
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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");
}
}
}
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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());
}
}
}
60 Day Free Trial or Visit ByteScout Premium Suite Home Page
Explore ByteScout Premium Suite Documentation
Explore Samples
Sign Up for ByteScout Premium Suite Online Training
Get Your API Key
Explore Web API Docs
Explore Web API Samples
60 Day Free Trial or Visit ByteScout Premium Suite Home Page
Explore ByteScout Premium Suite Documentation
Explore Samples
Sign Up for ByteScout Premium Suite Online Training
Get Your API Key
Explore Web API Docs
Explore Web API Samples
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