■ 최소값 필터 회선을 적용하는 방법을 보여준다.
▶ 예제 코드 (C#)
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#region 최소값 필터 회선 적용하기 - ConvolveMinimumValueFilter(sourceArray, windowWidth, windowHeight) /// <summary> /// 최소값 필터 회선 적용하기 /// </summary> /// <param name="sourceArray">소스 배열</param> /// <param name="windowWidth">윈도우 너비</param> /// <param name="windowHeight">윈도우 높이</param> /// <returns>최소값 필터 회선 적용 배열</returns> public int[,] ConvolveMinimumValueFilter(int[,] sourceArray, int windowWidth, int windowHeight) { int sourceWidth = sourceArray.GetUpperBound(1) + 1; int sourceHeight = sourceArray.GetUpperBound(0) + 1; int[,] resultArray = new int[sourceHeight, sourceWidth]; int xPadding = windowWidth / 2; int yPadding = windowHeight / 2; int windowSize = windowHeight * windowWidth; int[] targetArray = new int[windowSize]; int index; for(int y = 0; y < sourceHeight - 2 * yPadding; y++) { for(int x = 0; x < sourceWidth - 2 * xPadding; x++) { index = 0; for(int r = 0; r < windowHeight; r++) { for(int c = 0; c < windowWidth; c++) { targetArray[index++] = sourceArray[y + r, x + c]; } } resultArray[y + yPadding, x + xPadding] = GetMinimumValue(targetArray, windowSize); } } for(int y = 0; y < yPadding; y++) { for(int x = xPadding; x < sourceWidth - xPadding; x++) { resultArray[y, x] = resultArray[yPadding, x]; resultArray[sourceHeight - 1 - y, x] = resultArray[sourceHeight - 1 - yPadding, x]; } } for(int x = 0; x < xPadding; x++) { for(int y = 0; y < sourceHeight; y++) { resultArray[y, x] = resultArray[y, xPadding]; resultArray[y, sourceWidth - 1 - x] = resultArray[y, sourceWidth - 1 - xPadding]; } } return resultArray; } #endregion #region 최소값 구하기 - GetMinimumValue(targetArray, targetLength) /// <summary> /// 최소값 구하기 /// </summary> /// <param name="targetArray">타겟 배열</param> /// <param name="targetLength">타겟 길이</param> /// <returns>최소값</returns> private int GetMinimumValue(int[] targetArray, int targetLength) { int minimumValue = targetArray[0]; for(int i = 1; i < targetLength; i++) { if(targetArray[i] < minimumValue) { minimumValue = targetArray[i]; } } return minimumValue; } #endregion |