ByteScout Premium Suite – C# – Select Region And Perform OCR

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ByteScout Premium Suite – C# – Select Region And Perform OCR

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ByteScout-Premium-Suite-C-sharp-Select-Region-And-Perform-OCR.pdf

How to select region and perform OCR in C# using ByteScout Premium Suite

If you want to learn more then this tutorial will show how to select region and perform OCR in C#

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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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;
    }
}

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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");
        }
    }
}

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Explore ByteScout Premium Suite Documentation

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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());
        }
    }
}