[C#/WINFORM] ImageAttributes 클래스 : 이미지 명도 조정하기

TestProject.zip

다운로드

▶ MainForm.cs

using System;
using System.Drawing;
using System.Drawing.Imaging;
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.sourcePictureBox.Image = Image.FromFile("sample.jpg");

            #region 이벤트를 설정한다.

            Load                            += Form_Load;
            this.brightnessScrollBar.Scroll += brightnessScrollBar_Scroll;

            #endregion
        }

        #endregion

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

        #region 폼 로드시 처리하기 - Form_Load(sender, e)

        /// <summary>
        /// 폼 로드시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void Form_Load(object sender, EventArgs e)
        {
            this.brightnessScrollBar.Value = 150;

            SetBrightness();
        }

        #endregion
        #region 명도 스크롤바 스크롤시 처리하기 - brightnessScrollBar_Scroll(sender, e)

        /// <summary>
        /// 명도 스크롤바 스크롤시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void brightnessScrollBar_Scroll(object sender, ScrollEventArgs e)
        {
            SetBrightness();
        }

        #endregion

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

        #region 이미지 구하기 - GetImage(sourceImage, brightness)

        /// <summary>
        /// 이미지 구하기
        /// </summary>
        /// <param name="sourceImage">소스 이미지</param>
        /// <param name="brightness">명도</param>
        /// <returns>이미지</returns>
        private Bitmap GetImage(Image sourceImage, float brightness)
        {
            ColorMatrix colorMatrix = new ColorMatrix
            (
                new float[][]
                {
                    new float[] {brightness, 0         , 0         , 0         , 0},
                    new float[] {0         , brightness, 0         , 0         , 0},
                    new float[] {0         , 0         , brightness, 0         , 0},
                    new float[] {0         , 0         , 0         , brightness, 0},
                    new float[] {0         , 0         , 0         , 0         , 1},
                }
            );

            ImageAttributes imageAttributes = new ImageAttributes();

            imageAttributes.SetColorMatrix(colorMatrix);

            Point[] pointArray =
            {
                new Point(0                , 0                 ),
                new Point(sourceImage.Width, 0                 ),
                new Point(0                , sourceImage.Height),
            };

            Rectangle rectangle = new Rectangle(0, 0, sourceImage.Width, sourceImage.Height);

            Bitmap bitmap = new Bitmap(sourceImage.Width, sourceImage.Height);

            using(Graphics graphics = Graphics.FromImage(bitmap))
            {
                graphics.DrawImage(sourceImage, pointArray, rectangle, GraphicsUnit.Pixel, imageAttributes);
            }

            return bitmap;
        }

        #endregion
        #region 이미지 명도 설정하기 - SetBrightness()

        /// <summary>
        /// 이미지 명도 설정하기
        /// </summary>
        private void SetBrightness()
        {
            this.brightnessLabel.Text = string.Format("명도 = {0}", (this.brightnessScrollBar.Value / 100.0).ToString());

            this.targetPictureBox.Image = GetImage(this.sourcePictureBox.Image, (float)(this.brightnessScrollBar.Value / 100.0));
        }

        #endregion
    }
}