■ Bitmap 클래스에서 불선명 필터(Blur Filter)를 사용하는 방법을 보여준다.
▶ Matrix.cs
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namespace TestProject { /// <summary> /// 매트릭스 /// </summary> public static class Matrix { //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Public #region MEAN 3X3 - Mean3X3 /// <summary> /// MEAN 3X3 /// </summary> public static double[,] Mean3X3 { get { return new double[,] { { 1, 1, 1, }, { 1, 1, 1, }, { 1, 1, 1, } }; } } #endregion #region MEAN 5X5 - Mean5X5 /// <summary> /// MEAN 5X5 /// </summary> public static double[,] Mean5X5 { get { return new double[,] { { 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1 } }; } } #endregion #region MEAN 7X7 - Mean7X7 /// <summary> /// MEAN 7X7 /// </summary> public static double[,] Mean7X7 { get { return new double[,] { { 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1 }, }; } } #endregion #region MEAN 9X9 - Mean9X9 /// <summary> /// MEAN 9X9 /// </summary> public static double[,] Mean9X9 { get { return new double[,] { { 1, 1, 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1, 1, 1 } }; } } #endregion #region GAUSSIAN BLUR 3X3 - GaussianBlur3X3 /// <summary> /// GAUSSIAN BLUR 3X3 /// </summary> public static double[,] GaussianBlur3X3 { get { return new double[,] { { 1, 2, 1, }, { 2, 4, 2, }, { 1, 2, 1, } }; } } #endregion #region GAUSSIAN BLUR 5X5 - GaussianBlur5X5 /// <summary> /// GAUSSIAN BLUR 5X5 /// </summary> public static double[,] GaussianBlur5X5 { get { return new double[,] { { 2, 04, 05, 04, 2 }, { 4, 09, 12, 09, 4 }, { 5, 12, 15, 12, 5 }, { 4, 09, 12, 09, 4 }, { 2, 04, 05, 04, 2 } }; } } #endregion #region MOTION BLUR 5X5 - MotionBlur5X5 /// <summary> /// MOTION BLUR 5X5 /// </summary> public static double[,] MotionBlur5X5 { get { return new double[,] { { 1, 0, 0, 0, 1 }, { 0, 1, 0, 1, 0 }, { 0, 0, 1, 0, 0 }, { 0, 1, 0, 1, 0 }, { 1, 0, 0, 0, 1 } }; } } #endregion #region MOTION BLUR 5X5 AT 45 DEGREES - MotionBlur5X5At45Degrees /// <summary> /// MOTION BLUR 5X5 AT 45 DEGREES /// </summary> public static double[,] MotionBlur5X5At45Degrees { get { return new double[,] { { 0, 0, 0, 0, 1 }, { 0, 0, 0, 1, 0 }, { 0, 0, 1, 0, 0 }, { 0, 1, 0, 0, 0 }, { 1, 0, 0, 0, 0 } }; } } #endregion #region MOTION BLUR 5X5 AT 135 DEGREES - MotionBlur5X5At135Degrees /// <summary> /// MOTION BLUR 5X5 AT 135 DEGREES /// </summary> public static double[,] MotionBlur5X5At135Degrees { get { return new double[,] { { 1, 0, 0, 0, 0 }, { 0, 1, 0, 0, 0 }, { 0, 0, 1, 0, 0 }, { 0, 0, 0, 1, 0 }, { 0, 0, 0, 0, 1 } }; } } #endregion #region MOTION BLUR 7X7 - MotionBlur7X7 /// <summary> /// MOTION BLUR 7X7 /// </summary> public static double[,] MotionBlur7X7 { get { return new double[,] { { 1, 0, 0, 0, 0, 0, 1 }, { 0, 1, 0, 0, 0, 1, 0 }, { 0, 0, 1, 0, 1, 0, 0 }, { 0, 0, 0, 1, 0, 0, 0 }, { 0, 0, 1, 0, 1, 0, 0 }, { 0, 1, 0, 0, 0, 1, 0 }, { 1, 0, 0, 0, 0, 0, 1 } }; } } #endregion #region MOTION BLUR 7X7 AT 45 DEGREES - MotionBlur7X7At45Degrees /// <summary> /// MOTION BLUR 7X7 AT 45 DEGREES /// </summary> public static double[,] MotionBlur7X7At45Degrees { get { return new double[,] { { 0, 0, 0, 0, 0, 0, 1 }, { 0, 0, 0, 0, 0, 1, 0 }, { 0, 0, 0, 0, 1, 0, 0 }, { 0, 0, 0, 1, 0, 0, 0 }, { 0, 0, 1, 0, 0, 0, 0 }, { 0, 1, 0, 0, 0, 0, 0 }, { 1, 0, 0, 0, 0, 0, 0 } }; } } #endregion #region MOTION BLUR 7X7 AT 135 DEGREES - MotionBlur7X7At135Degrees /// <summary> /// MOTION BLUR 7X7 AT 135 DEGREES /// </summary> public static double[,] MotionBlur7X7At135Degrees { get { return new double[,] { { 1, 0, 0, 0, 0, 0, 0 }, { 0, 1, 0, 0, 0, 0, 0 }, { 0, 0, 1, 0, 0, 0, 0 }, { 0, 0, 0, 1, 0, 0, 0 }, { 0, 0, 0, 0, 1, 0, 0 }, { 0, 0, 0, 0, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 1 } }; } } #endregion #region MOTION BLUR 9X9 - MotionBlur9X9 /// <summary> /// MOTION BLUR 9X9 /// </summary> public static double[,] MotionBlur9X9 { get { return new double[,] { { 1, 0, 0, 0, 0, 0, 0, 0, 1 }, { 0, 1, 0, 0, 0, 0, 0, 1, 0 }, { 0, 0, 1, 0, 0, 0, 1, 0, 0 }, { 0, 0, 0, 1, 0, 1, 0, 0, 0 }, { 0, 0, 0, 0, 1, 0, 0, 0, 0 }, { 0, 0, 0, 1, 0, 1, 0, 0, 0 }, { 0, 0, 1, 0, 0, 0, 1, 0, 0 }, { 0, 1, 0, 0, 0, 0, 0, 1, 0 }, { 1, 0, 0, 0, 0, 0, 0, 0, 1 } }; } } #endregion #region MOTION BLUR 9X9 AT 45 DEGREES - MotionBlur9X9At45Degrees /// <summary> /// MOTION BLUR 9X9 AT 45 DEGREES /// </summary> public static double[,] MotionBlur9X9At45Degrees { get { return new double[,] { { 0, 0, 0, 0, 0, 0, 0, 0, 1 }, { 0, 0, 0, 0, 0, 0, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 1, 0, 0 }, { 0, 0, 0, 0, 0, 1, 0, 0, 0 }, { 0, 0, 0, 0, 1, 0, 0, 0, 0 }, { 0, 0, 0, 1, 0, 0, 0, 0, 0 }, { 0, 0, 1, 0, 0, 0, 0, 0, 0 }, { 0, 1, 0, 0, 0, 0, 0, 0, 0 }, { 1, 0, 0, 0, 0, 0, 0, 0, 0 } }; } } #endregion #region MOTION BLUR 9X9 AT 135 DEGREES - MotionBlur9X9At135Degrees /// <summary> /// MOTION BLUR 9X9 AT 135 DEGREES /// </summary> public static double[,] MotionBlur9X9At135Degrees { get { return new double[,] { { 1, 0, 0, 0, 0, 0, 0, 0, 0 }, { 0, 1, 0, 0, 0, 0, 0, 0, 0 }, { 0, 0, 1, 0, 0, 0, 0, 0, 0 }, { 0, 0, 0, 1, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 1, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 1, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 1, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 1 } }; } } #endregion } } |
▶ BlurType.cs
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namespace TestProject { /// <summary> /// 불선명 타입 /// </summary> public enum BlurType { /// <summary> /// 평균 3X3 /// </summary> Mean3X3, /// <summary> /// 평균 5X5 /// </summary> Mean5X5, /// <summary> /// 평균 7X7 /// </summary> Mean7X7, /// <summary> /// 평균 9X9 /// </summary> Mean9X9, /// <summary> /// 가우시안 BLUR 3X3 /// </summary> GaussianBlur3X3, /// <summary> /// 가우시안 BLUR 5X5 /// </summary> GaussianBlur5X5, /// <summary> /// 모션 BLUR 5X5 /// </summary> MotionBlur5X5, /// <summary> /// 모션 BLUR 5X5 45도 /// </summary> MotionBlur5X5At45Degrees, /// <summary> /// 모션 BLUR 5X5 135도 /// </summary> MotionBlur5X5At135Degrees, /// <summary> /// 모션 BLUR 7X7 /// </summary> MotionBlur7X7, /// <summary> /// 모션 BLUR 7X7 45도 /// </summary> MotionBlur7X7At45Degrees, /// <summary> /// 모션 BLUR 7X7 135도 /// </summary> MotionBlur7X7At135Degrees, /// <summary> /// 모션 BLUR 9X9 /// </summary> MotionBlur9X9, /// <summary> /// 모션 BLUR 9X9 45도 /// </summary> MotionBlur9X9At45Degrees, /// <summary> /// 모션 BLUR 9X9 135도 /// </summary> MotionBlur9X9At135Degrees, /// <summary> /// 중앙값 3X3 /// </summary> Median3X3, /// <summary> /// 중앙값 5X5 /// </summary> Median5X5, /// <summary> /// 중앙값 7X7 /// </summary> Median7X7, /// <summary> /// 중앙값 9X9 /// </summary> Median9X9, /// <summary> /// 중앙값 11X11 /// </summary> Median11X11 } } |
▶ BitmapHelper.cs
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using System; using System.Collections.Generic; using System.Drawing; using System.Drawing.Imaging; using System.Runtime.InteropServices; namespace TestProject { /// <summary> /// 비트맵 헬퍼 /// </summary> public static class BitmapHelper { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Public #region 비트맵 로드하기 - LoadBitmap(filePath) /// <summary> /// 비트맵 로드하기 /// </summary> /// <param name="filePath">파일 경로</param> /// <returns>비트맵</returns> public static Bitmap LoadBitmap(string filePath) { using(Bitmap bitmap = new Bitmap(filePath)) { return new Bitmap(bitmap); } } #endregion #region 불선명 필터 적용하기 - ApplyBlurFilter(sourceBitmap, blurType) /// <summary> /// 불선명 필터 적용하기 /// </summary> /// <param name="sourceBitmap">소스 비트맵</param> /// <param name="blurType">불선명 타입</param> /// <returns>비트맵</returns> public static Bitmap ApplyBlurFilter(Bitmap sourceBitmap, BlurType blurType) { Bitmap targetBitmap = null; switch(blurType) { case BlurType.Mean3X3 : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.Mean3X3, 1.0 / 9.0, 0); break; case BlurType.Mean5X5 : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.Mean5X5, 1.0 / 25.0, 0); break; case BlurType.Mean7X7 : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.Mean7X7, 1.0 / 49.0, 0); break; case BlurType.Mean9X9 : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.Mean9X9, 1.0 / 81.0, 0); break; case BlurType.GaussianBlur3X3 : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.GaussianBlur3X3, 1.0 / 16.0, 0); break; case BlurType.GaussianBlur5X5 : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.GaussianBlur5X5, 1.0 / 159.0, 0); break; case BlurType.MotionBlur5X5 : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.MotionBlur5X5, 1.0 / 10.0, 0); break; case BlurType.MotionBlur5X5At45Degrees : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.MotionBlur5X5At45Degrees, 1.0 / 5.0, 0); break; case BlurType.MotionBlur5X5At135Degrees : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.MotionBlur5X5At135Degrees, 1.0 / 5.0, 0); break; case BlurType.MotionBlur7X7 : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.MotionBlur7X7, 1.0 / 14.0, 0); break; case BlurType.MotionBlur7X7At45Degrees : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.MotionBlur7X7At45Degrees, 1.0 / 7.0, 0); break; case BlurType.MotionBlur7X7At135Degrees : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.MotionBlur7X7At135Degrees, 1.0 / 7.0, 0); break; case BlurType.MotionBlur9X9 : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.MotionBlur9X9, 1.0 / 18.0, 0); break; case BlurType.MotionBlur9X9At45Degrees : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.MotionBlur9X9At45Degrees, 1.0 / 9.0, 0); break; case BlurType.MotionBlur9X9At135Degrees : targetBitmap = ApplyConvolutionFilter(sourceBitmap, Matrix.MotionBlur9X9At135Degrees, 1.0 / 9.0, 0); break; case BlurType.Median3X3 : targetBitmap = ApplyMedianFilter(sourceBitmap, 3); break; case BlurType.Median5X5 : targetBitmap = ApplyMedianFilter(sourceBitmap, 5); break; case BlurType.Median7X7 : targetBitmap = ApplyMedianFilter(sourceBitmap, 7); break; case BlurType.Median9X9 : targetBitmap = ApplyMedianFilter(sourceBitmap, 9); break; case BlurType.Median11X11 : targetBitmap = ApplyMedianFilter(sourceBitmap, 11); break; } return targetBitmap; } #endregion //////////////////////////////////////////////////////////////////////////////// Private #region 회선 필터 적용하기 - ApplyConvolutionFilter(sourceBitmap, filterArray, factor, bias) /// <summary> /// 회선 필터 적용하기 /// </summary> /// <param name="sourceBitmap">소스 비트맵</param> /// <param name="filterArray">필터 배열</param> /// <param name="factor">인자</param> /// <param name="bias">바이어스</param> /// <returns>비트맵</returns> private static Bitmap ApplyConvolutionFilter(Bitmap sourceBitmap, double[,] filterArray, double factor = 1, int bias = 0) { BitmapData sourceBitmapData = sourceBitmap.LockBits ( new Rectangle(0, 0, sourceBitmap.Width, sourceBitmap.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb ); byte[] sourceByteArray = new byte[sourceBitmapData.Stride * sourceBitmapData.Height]; byte[] targetByteArray = new byte[sourceBitmapData.Stride * sourceBitmapData.Height]; Marshal.Copy(sourceBitmapData.Scan0, sourceByteArray, 0, sourceByteArray.Length); sourceBitmap.UnlockBits(sourceBitmapData); double blue = 0.0; double green = 0.0; double red = 0.0; int filterWidth = filterArray.GetLength(1); int filterHeight = filterArray.GetLength(0); int filterOffset = (filterWidth - 1) / 2; int temporaryOffset = 0; int byteOffset = 0; for(int offsetY = filterOffset; offsetY < sourceBitmap.Height - filterOffset; offsetY++) { for(int offsetX = filterOffset; offsetX < sourceBitmap.Width - filterOffset; offsetX++) { blue = 0; green = 0; red = 0; byteOffset = offsetY * sourceBitmapData.Stride + offsetX * 4; for(int filterY = -filterOffset; filterY <= filterOffset; filterY++) { for(int filterX = -filterOffset; filterX <= filterOffset; filterX++) { temporaryOffset = byteOffset + (filterX * 4) + (filterY * sourceBitmapData.Stride); blue += (double)(sourceByteArray[temporaryOffset]) * filterArray[filterY + filterOffset, filterX + filterOffset]; green += (double)(sourceByteArray[temporaryOffset + 1]) * filterArray[filterY + filterOffset, filterX + filterOffset]; red += (double)(sourceByteArray[temporaryOffset + 2]) * filterArray[filterY + filterOffset, filterX + filterOffset]; } } blue = factor * blue + bias; green = factor * green + bias; red = factor * red + bias; blue = (blue > 255 ? 255 : (blue < 0 ? 0 : blue )); green = (green > 255 ? 255 : (green < 0 ? 0 : green)); red = (red > 255 ? 255 : (red < 0 ? 0 : red )); targetByteArray[byteOffset ] = (byte)(blue); targetByteArray[byteOffset + 1] = (byte)(green); targetByteArray[byteOffset + 2] = (byte)(red); targetByteArray[byteOffset + 3] = 255; } } Bitmap targetBitmap = new Bitmap(sourceBitmap.Width, sourceBitmap.Height); BitmapData targetBitmapData = targetBitmap.LockBits ( new Rectangle(0, 0, targetBitmap.Width, targetBitmap.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb ); Marshal.Copy(targetByteArray, 0, targetBitmapData.Scan0, targetByteArray.Length); targetBitmap.UnlockBits(targetBitmapData); return targetBitmap; } #endregion #region 중앙값 필터 적용하기 - ApplyMedianFilter(sourceBitmap, matrixSize) /// <summary> /// 중앙값 필터 적용하기 /// </summary> /// <param name="sourceBitmap">소스 비트맵</param> /// <param name="matrixSize">매트릭스 크기</param> /// <returns>비트맵</returns> private static Bitmap ApplyMedianFilter(Bitmap sourceBitmap, int matrixSize) { BitmapData sourceBitmapData = sourceBitmap.LockBits ( new Rectangle(0, 0, sourceBitmap.Width, sourceBitmap.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb ); byte[] sourceByteArray = new byte[sourceBitmapData.Stride * sourceBitmapData.Height]; byte[] targetByteArray = new byte[sourceBitmapData.Stride * sourceBitmapData.Height]; Marshal.Copy(sourceBitmapData.Scan0, sourceByteArray, 0, sourceByteArray.Length); sourceBitmap.UnlockBits(sourceBitmapData); int filterOffset = (matrixSize - 1) / 2; int temporaryOffset = 0; int byteOffset = 0; List<int> neighbourPixelList = new List<int>(); byte[] middlePixel; for(int offsetY = filterOffset; offsetY < sourceBitmap.Height - filterOffset; offsetY++) { for(int offsetX = filterOffset; offsetX < sourceBitmap.Width - filterOffset; offsetX++) { byteOffset = offsetY * sourceBitmapData.Stride + offsetX * 4; neighbourPixelList.Clear(); for(int filterY = -filterOffset; filterY <= filterOffset; filterY++) { for(int filterX = -filterOffset; filterX <= filterOffset; filterX++) { temporaryOffset = byteOffset + (filterX * 4) + (filterY * sourceBitmapData.Stride); neighbourPixelList.Add(BitConverter.ToInt32(sourceByteArray, temporaryOffset)); } } neighbourPixelList.Sort(); middlePixel = BitConverter.GetBytes(neighbourPixelList[filterOffset]); targetByteArray[byteOffset ] = middlePixel[0]; targetByteArray[byteOffset + 1] = middlePixel[1]; targetByteArray[byteOffset + 2] = middlePixel[2]; targetByteArray[byteOffset + 3] = middlePixel[3]; } } Bitmap targetBitmap = new Bitmap(sourceBitmap.Width, sourceBitmap.Height); BitmapData targetBitmapData = targetBitmap.LockBits ( new Rectangle(0, 0, targetBitmap.Width, targetBitmap.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb ); Marshal.Copy(targetByteArray, 0, targetBitmapData.Scan0, targetByteArray.Length); targetBitmap.UnlockBits(targetBitmapData); return targetBitmap; } #endregion } } |
▶ MainForm.cs
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using System.Drawing; 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(); Bitmap sourceBitmap = BitmapHelper.LoadBitmap("IMAGE\\sample.jpg"); Bitmap targetBitmap = BitmapHelper.ApplyBlurFilter(sourceBitmap, BlurType.MotionBlur9X9At135Degrees); this.pictureBox.SizeMode = PictureBoxSizeMode.Zoom; this.pictureBox.Image = targetBitmap; } #endregion } } |
