■ Bitmap 클래스에서 오일 페인트 필터(Oil Paint Filter)를 사용하는 방법을 보여준다.
▶ BitmapHelper.cs
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using System; 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 오일 페인트 필터 적용하기 - ApplyOilPaintFilter(sourceBitmap, level, filterSize) /// <summary> /// 오일 페인트 필터 적용하기 /// </summary> /// <param name="sourceBitmap">소스 비트맵</param> /// <param name="level">레벨</param> /// <param name="filterSize">필터 크기</param> /// <returns>비트맵</returns> public static Bitmap ApplyOilPaintFilter(Bitmap sourceBitmap, int level, int filterSize) { 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[] intensityArray = new int [level]; int[] blueArray = new int [level]; int[] greenArray = new int [level]; int[] redArray = new int [level]; level = level - 1; int filterOffset = (filterSize - 1) / 2; int targetOffset = 0; int sourceOffset = 0; int currentIntensity = 0; int maximumIntensity = 0; int maximumIndex = 0; double blue = 0; double green = 0; double red = 0; for(int offsetY = filterOffset; offsetY < sourceBitmap.Height - filterOffset; offsetY++) { for(int offsetX = filterOffset; offsetX < sourceBitmap.Width - filterOffset; offsetX++) { blue = green = red = 0; currentIntensity = maximumIntensity = maximumIndex = 0; intensityArray = new int[level + 1]; blueArray = new int[level + 1]; greenArray = new int[level + 1]; redArray = new int[level + 1]; targetOffset = offsetY * sourceBitmapData.Stride + offsetX * 4; for(int filterY = -filterOffset; filterY <= filterOffset; filterY++) { for(int filterX = -filterOffset; filterX <= filterOffset; filterX++) { sourceOffset = targetOffset + (filterX * 4) + (filterY * sourceBitmapData.Stride); currentIntensity = (int )Math.Round ( ((double)(sourceByteArray[sourceOffset ] + sourceByteArray[sourceOffset + 1] + sourceByteArray[sourceOffset + 2]) / 3.0 * (level)) / 255.0 ); intensityArray[currentIntensity] += 1; blueArray [currentIntensity] += sourceByteArray[sourceOffset ]; greenArray[currentIntensity] += sourceByteArray[sourceOffset + 1]; redArray [currentIntensity] += sourceByteArray[sourceOffset + 2]; if(intensityArray[currentIntensity] > maximumIntensity) { maximumIntensity = intensityArray[currentIntensity]; maximumIndex = currentIntensity; } } } blue = blueArray [maximumIndex] / maximumIntensity; green = greenArray[maximumIndex] / maximumIntensity; red = redArray [maximumIndex] / maximumIntensity; targetByteArray[targetOffset ] = ClipByte(blue); targetByteArray[targetOffset + 1] = ClipByte(green); targetByteArray[targetOffset + 2] = ClipByte(red); targetByteArray[targetOffset + 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 //////////////////////////////////////////////////////////////////////////////// Private #region 바이트 자르기 - ClipByte(value) /// <summary> /// 바이트 자르기 /// </summary> /// <param name="value">값</param> /// <returns>바이트</returns> private static byte ClipByte(double value) { return (byte)(value > 255 ? 255 : (value < 0 ? 0 : value)); } #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.ApplyOilPaintFilter(sourceBitmap, 15, 13); this.pictureBox.SizeMode = PictureBoxSizeMode.Zoom; this.pictureBox.Image = targetBitmap; } #endregion } } |
※ 실행시 필터 연산이 오래 걸려서 화면이 늦게 표시된다.
