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Image Processing Lab in C#

, 13 Mar 2007
A tool and library for image processing
iplab_demo.zip
iplab_demo
AForge.dll
AForge.Imaging.chm
AForge.Imaging.dll
AForge.Math.dll
DockingToolbar.dll
iplab.exe
SourceGrid2.dll
SourceLibrary.dll
WeifenLuo.WinFormsUI.dll
iplab_src.zip
iplab_src
icons
about.gif
clone.gif
convolution.gif
copy.gif
cut.gif
disk.gif
fit_to_size.gif
folder_out.gif
fourier.gif
grayscale.gif
histogram_window.gif
levels.gif
morphology.gif
paste.gif
pie-chart.gif
resize.gif
rotate.gif
threshold.gif
view_1_1.gif
zoom_in.gif
zoom_out.gif
iplab
App.ico
banner.gif
column-chart.ico
Controls
Filters Forms
line-chart.ico
References
AForge.dll
AForge.Imaging.dll
AForge.Math.dll
DockingToolbar.dll
SourceGrid2.dll
SourceLibrary.dll
WeifenLuo.WinFormsUI.dll
Resources
arrow.bmp
harrow.cur
hmove.cur
Tools
// Image Processing Lab
//
// Copyright � Andrew Kirillov, 2005
// andrew.kirillov@gmail.com
//

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using WeifenLuo.WinFormsUI;

using AForge;
using AForge.Math;
using AForge.Imaging;

namespace IPLab
{
    /// <summary>
    /// Summary description for FourierDoc.
    /// </summary>
    public class FourierDoc : Content
    {
        private ComplexImage image = null;
        private ComplexImage backup = null;
        private System.Drawing.Bitmap bitmap = null;
        private int width;
        private int height;
        private IDocumentsHost host = null;

        private System.Windows.Forms.MainMenu mainMenu;
        private System.Windows.Forms.MenuItem fourierItem;
        private System.Windows.Forms.MenuItem backwardFourierItem;
        private System.Windows.Forms.MenuItem menuItem1;
        private System.Windows.Forms.MenuItem frequencyFilterFourierItem;
        private System.Windows.Forms.MenuItem undoFourierItem;

        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;

        // Image property
        public Bitmap Image
        {
            get { return bitmap; }
        }
        // Width property
        public int ImageWidth
        {
            get { return width; }
        }
        // Height property
        public int ImageHeight
        {
            get { return height; }
        }

        // Constructors
        public FourierDoc( ComplexImage image, IDocumentsHost host )
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent( );

            //
            this.host = host;
            this.image = image;

            width = image.Width;
            height = image.Height;

            UpdateNewImage( );

            // form style
            SetStyle( ControlStyles.AllPaintingInWmPaint | ControlStyles.DoubleBuffer | ControlStyles.ResizeRedraw, true );

            // init scroll bars
            this.AutoScroll = true;
            // scroll bar size
            this.AutoScrollMinSize = new Size( width, height );
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if ( disposing )
            {
                if ( components != null )
                {
                    components.Dispose( );
                }
                if ( bitmap != null )
                {
                    bitmap.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( )
        {
            this.mainMenu = new System.Windows.Forms.MainMenu( );
            this.fourierItem = new System.Windows.Forms.MenuItem( );
            this.backwardFourierItem = new System.Windows.Forms.MenuItem( );
            this.menuItem1 = new System.Windows.Forms.MenuItem( );
            this.frequencyFilterFourierItem = new System.Windows.Forms.MenuItem( );
            this.undoFourierItem = new System.Windows.Forms.MenuItem( );
            // 
            // mainMenu
            // 
            this.mainMenu.MenuItems.AddRange( new System.Windows.Forms.MenuItem[] {
																					 this.fourierItem} );
            // 
            // fourierItem
            // 
            this.fourierItem.Index = 0;
            this.fourierItem.MenuItems.AddRange( new System.Windows.Forms.MenuItem[] {
																						this.backwardFourierItem,
																						this.menuItem1,
																						this.frequencyFilterFourierItem,
																						this.undoFourierItem} );
            this.fourierItem.MergeOrder = 1;
            this.fourierItem.Text = "Fourier";
            this.fourierItem.Popup += new System.EventHandler( this.fourierItem_Popup );
            // 
            // backwardFourierItem
            // 
            this.backwardFourierItem.Index = 0;
            this.backwardFourierItem.Text = "&Backward Transformation";
            this.backwardFourierItem.Click += new System.EventHandler( this.backwardFourierItem_Click );
            // 
            // menuItem1
            // 
            this.menuItem1.Index = 1;
            this.menuItem1.Text = "-";
            // 
            // frequencyFilterFourierItem
            // 
            this.frequencyFilterFourierItem.Index = 2;
            this.frequencyFilterFourierItem.Text = "Frequency Filter";
            this.frequencyFilterFourierItem.Click += new System.EventHandler( this.frequencyFilterFourierItem_Click );
            // 
            // undoFourierItem
            // 
            this.undoFourierItem.Index = 3;
            this.undoFourierItem.Shortcut = System.Windows.Forms.Shortcut.CtrlZ;
            this.undoFourierItem.Text = "&Undo";
            this.undoFourierItem.Click += new System.EventHandler( this.undoFourierItem_Click );
            // 
            // FourierDoc
            // 
            this.AllowedStates = WeifenLuo.WinFormsUI.ContentStates.Document;
            this.AutoScaleBaseSize = new System.Drawing.Size( 5, 13 );
            this.ClientSize = new System.Drawing.Size( 576, 453 );
            this.Menu = this.mainMenu;
            this.Name = "FourierDoc";
            this.Text = "Fourier";

        }
        #endregion

        // Update document
        private void UpdateNewImage( )
        {
            if ( bitmap != null )
            {
                bitmap.Dispose( );
                bitmap = null;
            }

            bitmap = image.ToBitmap( );
            Invalidate( );
        }

        // Paint image
        protected override void OnPaint( PaintEventArgs e )
        {
            if ( bitmap != null )
            {
                Graphics g = e.Graphics;
                Rectangle rc = ClientRectangle;
                Pen pen = new Pen( Color.FromArgb( 0, 0, 0 ) );

                int x = ( rc.Width < width ) ? this.AutoScrollPosition.X : ( rc.Width - width ) / 2;
                int y = ( rc.Height < height ) ? this.AutoScrollPosition.Y : ( rc.Height - height ) / 2;

                // draw rectangle around the image
                g.DrawRectangle( pen, x - 1, y - 1, width + 1, height + 1 );

                // draw image
                g.DrawImage( bitmap, x, y, width, height );

                pen.Dispose( );
            }
        }

        // Backward Fourier transformation
        private void backwardFourierItem_Click( object sender, System.EventArgs e )
        {
            ComplexImage cimg = (ComplexImage) image.Clone( );

            cimg.BackwardFourierTransform( );
            host.NewDocument( cimg.ToBitmap( ) );
        }

        // Frequency filter
        private void frequencyFilterFourierItem_Click( object sender, System.EventArgs e )
        {
            FrequencyFilter form = new FrequencyFilter( );

            form.InputRange = new IntRange( 0, width >> 1 );
            form.OutputRange = new IntRange( 0, width >> 1 );

            if ( form.ShowDialog( ) == DialogResult.OK )
            {
                backup = (ComplexImage) image.Clone( );

                image.FrequencyFilter( form.OutputRange );
                UpdateNewImage( );
            }
        }

        // Undo filter
        private void undoFourierItem_Click( object sender, System.EventArgs e )
        {
            if ( backup != null )
            {
                image = backup;
                backup = null;
                UpdateNewImage( );
            }
        }

        // On "Fourier" menu popup
        private void fourierItem_Popup( object sender, System.EventArgs e )
        {
            undoFourierItem.Enabled = backup != null;
        }
    }
}

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License

This article, along with any associated source code and files, is licensed under The GNU General Public License (GPLv3)

About the Author

Andrew Kirillov
Software Developer (Senior) Cisco Systems
United Kingdom United Kingdom
Started software development at about 15 years old and it seems like now it lasts most part of my life. Fortunately did not spend too much time with Z80 and BK0010 and switched to 8086 and further. Similar with programming languages – luckily managed to get away from BASIC and Pascal to things like Assembler, C, C++ and then C#. Apart from daily programming for food, do it also for hobby, where mostly enjoy areas like Computer Vision, Robotics and AI. This led to some open source stuff like AForge.NET.
 
Going out of computers I am just a man loving his family, enjoying traveling, a bit of books, a bit of movies and a mixture of everything else. Always wanted to learn playing guitar, but it seems like 6 strings are much harder than few dozens of keyboard’s keys. Will keep progressing ...

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