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TestProject.zip
다운로드

▶ BitmapHelper.cs

using System.Drawing;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;

namespace TestProject
{
    /// <summary>
    /// 비트맵 헬퍼
    /// </summary>
    public class BitmapHelper
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region Field

        /// <summary>
        /// 이미지 바이트 배열
        /// </summary>
        public byte[] ImageByteArray;

        /// <summary>
        /// 행 크기 바이트 수
        /// </summary>
        public int RowSizeByteCount;

        /// <summary>
        /// 픽셀 데이터 크기
        /// </summary>
        public const int PixelDataSize = 32;

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 비트맵
        /// </summary>
        private Bitmap bitmap;

        /// <summary>
        /// 비트맵 데이터
        /// </summary>
        private BitmapData bitmapData;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Property
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 너비 - Width

        /// <summary>
        /// 너비
        /// </summary>
        public int Width
        {
            get
            {
                return this.bitmap.Width;
            }
        }

        #endregion
        #region 높이 - Height

        /// <summary>
        /// 높이
        /// </summary>
        public int Height
        {
            get
            {
                return this.bitmap.Height;
            }
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - BitmapHelper(bitmap)

        /// <summary>
        /// 생성자
        /// </summary>
        /// <param name="bitmap">비트맵</param>
        public BitmapHelper(Bitmap bitmap)
        {
            this.bitmap = bitmap;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 비트맵 잠그기 - LockBitmap()

        /// <summary>
        /// 비트맵 잠그기
        /// </summary>
        public void LockBitmap()
        {
            Rectangle boundRectangle = new Rectangle(0, 0, this.bitmap.Width, this.bitmap.Height);

            this.bitmapData = this.bitmap.LockBits
            (
                boundRectangle,
                ImageLockMode.ReadWrite,
                PixelFormat.Format32bppArgb
            );

            RowSizeByteCount = this.bitmapData.Stride;

            int totalSize = this.bitmapData.Stride * this.bitmapData.Height;

            ImageByteArray = new byte[totalSize];

            Marshal.Copy(this.bitmapData.Scan0, ImageByteArray, 0, totalSize);
        }

        #endregion
        #region 비트맵 잠금 해제하기 - UnlockBitmap()

        /// <summary>
        /// 비트맵 잠금 해제하기
        /// </summary>
        public void UnlockBitmap()
        {
            int totalSize = this.bitmapData.Stride * this.bitmapData.Height;

            Marshal.Copy(ImageByteArray, 0, this.bitmapData.Scan0, totalSize);

            this.bitmap.UnlockBits(this.bitmapData);

            ImageByteArray = null;

            this.bitmapData = null;
        }

        #endregion
        #region 픽셀 구하기 - GetPixel(x, y, red, green, blue, alpha)

        /// <summary>
        /// 픽셀 구하기
        /// </summary>
        /// <param name="x">X</param>
        /// <param name="y">Y</param>
        /// <param name="red">빨강색</param>
        /// <param name="green">녹색</param>
        /// <param name="blue">파랑색</param>
        /// <param name="alpha">불투명도</param>
        public void GetPixel(int x, int y, out byte red, out byte green, out byte blue, out byte alpha)
        {
            int i = y * this.bitmapData.Stride + x * 4;

            blue  = ImageByteArray[i++];
            green = ImageByteArray[i++];
            red   = ImageByteArray[i++];
            alpha = ImageByteArray[i  ];
        }

        #endregion
        #region 픽셀 설정하기 - SetPixel(x, y, red, green, blue, alpha)

        /// <summary>
        /// 픽셀 설정하기
        /// </summary>
        /// <param name="x">X</param>
        /// <param name="y">Y</param>
        /// <param name="red">빨강색</param>
        /// <param name="green">녹색</param>
        /// <param name="blue">파랑색</param>
        /// <param name="alpha">불투명도</param>
        public void SetPixel(int x, int y, byte red, byte green, byte blue, byte alpha)
        {
            int i = y * this.bitmapData.Stride + x * 4;

            ImageByteArray[i++] = blue;
            ImageByteArray[i++] = green;
            ImageByteArray[i++] = red;
            ImageByteArray[i  ] = alpha;
        }

        #endregion
        #region 빨강색 구하기 - GetRed(x, y)

        /// <summary>
        /// 빨강색 구하기
        /// </summary>
        /// <param name="x">X</param>
        /// <param name="y">Y</param>
        /// <returns>빨강색</returns>
        public byte GetRed(int x, int y)
        {
            int i = y * this.bitmapData.Stride + x * 4;

            return ImageByteArray[i + 2];
        }

        #endregion
        #region 빨강색 설정하기 - SetRed(x, y, red)

        /// <summary>
        /// 빨강색 설정하기
        /// </summary>
        /// <param name="x">X</param>
        /// <param name="y">Y</param>
        /// <param name="red">빨강색</param>
        public void SetRed(int x, int y, byte red)
        {
            int i = y * this.bitmapData.Stride + x * 4;

            ImageByteArray[i + 2] = red;
        }

        #endregion
        #region 녹색 구하기 - GetGreen(x, y)

        /// <summary>
        /// 녹색 구하기
        /// </summary>
        /// <param name="x">X</param>
        /// <param name="y">Y</param>
        /// <returns>녹색</returns>
        public byte GetGreen(int x, int y)
        {
            int i = y * this.bitmapData.Stride + x * 4;

            return ImageByteArray[i + 1];
        }

        #endregion
        #region 녹색 설정하기 - SetGreen(x, y, green)

        /// <summary>
        /// 녹색 설정하기
        /// </summary>
        /// <param name="x">X</param>
        /// <param name="y">Y</param>
        /// <param name="green">녹색</param>
        public void SetGreen(int x, int y, byte green)
        {
            int i = y * this.bitmapData.Stride + x * 4;

            ImageByteArray[i + 1] = green;
        }

        #endregion
        #region 파랑색 구하기 - GetBlue(x, y)

        /// <summary>
        /// 파랑색 구하기
        /// </summary>
        /// <param name="x">X</param>
        /// <param name="y">Y</param>
        /// <returns>파랑색</returns>
        public byte GetBlue(int x, int y)
        {
            int i = y * this.bitmapData.Stride + x * 4;

            return ImageByteArray[i];
        }

        #endregion
        #region 파랑색 설정하기 - SetBlue(x, y, blue)

        /// <summary>
        /// 파랑색 설정하기
        /// </summary>
        /// <param name="x">X</param>
        /// <param name="y">Y</param>
        /// <param name="blue">파랑색</param>
        public void SetBlue(int x, int y, byte blue)
        {
            int i = y * this.bitmapData.Stride + x * 4;

            ImageByteArray[i] = blue;
        }

        #endregion
        #region 붙투명도 구하기 - GetAlpha(x, y)

        /// <summary>
        /// 붙투명도 구하기
        /// </summary>
        /// <param name="x">X</param>
        /// <param name="y">Y</param>
        /// <returns>불투명도</returns>
        public byte GetAlpha(int x, int y)
        {
            int i = y * this.bitmapData.Stride + x * 4;

            return ImageByteArray[i + 3];
        }

        #endregion
        #region 불투명도 설정하기 - SetAlpha(x, y, alpha)

        /// <summary>
        /// 불투명도 설정하기
        /// </summary>
        /// <param name="x">X</param>
        /// <param name="y">Y</param>
        /// <param name="alpha">불투명도</param>
        public void SetAlpha(int x, int y, byte alpha)
        {
            int i = y * this.bitmapData.Stride + x * 4;

            ImageByteArray[i + 3] = alpha;
        }

        #endregion
    }
}

 

▶ MainForm.cs

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Windows.Forms;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            this.openMenuItem.Click     += openMenuItem_Click;
            this.saveAsMenuItem.Click   += saveAsMenuItem_Click;
            this.exitMenuItem.Click     += exitMenuItem_Click;
            this.cutoffScrollBar.Scroll += cutoffScrollBar_Scroll;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 열기 메뉴 항목 클릭시 처리하기 - openMenuItem_Click(sender, e)

        /// <summary>
        /// 열기 메뉴 항목 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void openMenuItem_Click(object sender, EventArgs e)
        {
            if(this.openFileDialog.ShowDialog() == DialogResult.OK)
            {
                this.sourcePictureBox.Image = GetBitmap(this.openFileDialog.FileName);

                ProcessBinaryContrast();
            }
        }

        #endregion
        #region 다른 이름으로 저장 메뉴 항목 클릭시 처리하기 - saveAsMenuItem_Click(sender, e)

        /// <summary>
        /// 다른 이름으로 저장 메뉴 항목 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void saveAsMenuItem_Click(object sender, EventArgs e)
        {
            if(this.saveFileDialog.ShowDialog() == DialogResult.OK)
            {
                SaveBitmap((Bitmap)this.targetPictureBox.Image, this.saveFileDialog.FileName);
            }
        }

        #endregion
        #region 종료 메뉴 항목 클릭시 처리하기 - exitMenuItem_Click(sender, e)

        /// <summary>
        /// 종료 메뉴 항목 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void exitMenuItem_Click(object sender, EventArgs e)
        {
            Close();
        }

        #endregion
        #region 컷오프 스크롤바 스크롤시 처리하기 - cutoffScrollBar_Scroll(sender, e)

        /// <summary>
        /// 컷오프 스크롤바 스크롤시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void cutoffScrollBar_Scroll(object sender, ScrollEventArgs e)
        {
            this.cutoffValueLabel.Text = this.cutoffScrollBar.Value.ToString();

            ProcessBinaryContrast();
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 비트맵 구하기 - GetBitmap(filePath)

        /// <summary>
        /// 비트맵 구하기
        /// </summary>
        /// <param name="filePath">파일 경로</param>
        /// <returns>비트맵</returns>
        private Bitmap GetBitmap(string filePath)
        {
            using(Bitmap bitmap = new Bitmap(filePath))
            {
                return new Bitmap(bitmap);
            }
        }

        #endregion
        #region 이진 대비 적용하기 - ApplyBinaryContrast(targetBitmap, cutoff)

        /// <summary>
        /// 이진 대비 적용하기
        /// </summary>
        /// <param name="targetBitmap">타겟 비트맵</param>
        /// <param name="cutoff">컷오프</param>
        private void ApplyBinaryContrast(Bitmap targetBitmap, int cutoff)
        {
            BitmapHelper helper = new BitmapHelper(targetBitmap);

            helper.LockBitmap();

            for(int y = 0; y < targetBitmap.Height; y++)
            {
                for(int x = 0; x < targetBitmap.Width; x++)
                {
                    byte red;
                    byte green;
                    byte blue;
                    byte alpha;

                    helper.GetPixel(x, y, out red, out green, out blue, out alpha);

                    if(red + green + blue > cutoff)
                    {
                        helper.SetPixel(x, y, 255, 255, 255, 255);
                    }
                    else
                    {
                        helper.SetPixel(x, y, 0, 0, 0, 255);
                    }
                }
            }

            helper.UnlockBitmap();
        }

        #endregion
        #region 이진 대비 처리하기 - ProcessBinaryContrast()

        /// <summary>
        /// 이진 대비 처리하기
        /// </summary>
        private void ProcessBinaryContrast()
        {
            if(this.sourcePictureBox.Image == null)
            {
                return;
            }

            Cursor = Cursors.WaitCursor;

            Bitmap bitmap = new Bitmap(this.sourcePictureBox.Image);

            ApplyBinaryContrast(bitmap, 3 * this.cutoffScrollBar.Value);

            if(this.targetPictureBox.Image != null)
            {
                this.targetPictureBox.Image.Dispose();
            }

            this.targetPictureBox.Image   = bitmap;
            this.targetPictureBox.Left    = this.sourcePictureBox.Right + 4;

            Cursor = Cursors.Default;
        }

        #endregion
        #region 비트맵 저장하기 - SaveBitmap(bitmap, filePath)

        /// <summary>
        /// 비트맵 저장하기
        /// </summary>
        /// <param name="bitmap">비트맵</param>
        /// <param name="filePath">파일 경로</param>
        public void SaveBitmap(Bitmap bitmap, string filePath)
        {
            string extension = Path.GetExtension(filePath);

            switch(extension.ToLower())
            {
                case ".bmp"  : bitmap.Save(filePath, ImageFormat.Bmp ); break;
                case ".exif" : bitmap.Save(filePath, ImageFormat.Exif); break;
                case ".gif"  : bitmap.Save(filePath, ImageFormat.Gif ); break;
                case ".jpg"  :
                case ".jpeg" : bitmap.Save(filePath, ImageFormat.Jpeg); break;
                case ".png"  : bitmap.Save(filePath, ImageFormat.Png ); break;
                case ".tif"  :
                case ".tiff" : bitmap.Save(filePath, ImageFormat.Tiff); break;
                default      : throw new NotSupportedException("Unknown file extension " + extension);
            }
        }

        #endregion
    }
}
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