[C#/COMMON] 배열 히스토그램 평활화 조정하기 (룩업 테이블)

■ 배열 히스토그램 평활화를 조정하는 방법을 보여준다. (룩업 테이블)

▶ 예제 코드 (C#)


#region 배열 히스토그램 평활화 조정하기 - AdjustArrayHistoramEqualization(targetArray)

/// <summary>
/// 배열 히스토그램 평활화 조정하기
/// </summary>
/// <param name="targetArray">타겟 배열</param>
public void AdjustArrayHistoramEqualization(int[,] targetArray)
{
    int    width          = targetArray.GetUpperBound(1) + 1;
    int    height         = targetArray.GetUpperBound(0) + 1;
    int[]  histogramArray = new int[256];
    double scale;
    int    summary;
    int[]  lutArray       = new int[256];

    histogramArray.Initialize();

    for(int y = 0; y < height; y++)
    {
        for(int x = 0; x < width; x++)
        {
            histogramArray[targetArray[y, x]]++;
        }
    }

    scale = 255.0 / (width * height);

    summary = 0;

    for(int x = 0; x < 256; x++)
    {
        summary += histogramArray[x];

        lutArray[x] = (int)(summary * scale + 0.5);
    }

    for(int y = 0; y < height; y++)
    {
        for(int x = 0; x < width; x++)
        {
            targetArray[y, x] = lutArray[targetArray[y, x]];
        }
    }
}

#endregion

#region 배열 히스토그램 평활화 조정하기 - AdjustArrayHistoramEqualization(targetArray)

/// <summary>

/// 배열 히스토그램 평활화 조정하기

/// </summary>

/// <param name="targetArray">타겟 배열</param>

public void AdjustArrayHistoramEqualization(int[,] targetArray)

{

int width = targetArray.GetUpperBound(1) + 1;

int height = targetArray.GetUpperBound(0) + 1;

int[] histogramArray = new int[256];

double scale;

int summary;

int[] lutArray = new int[256];

histogramArray.Initialize();

for(int y = 0; y < height; y++)

{

for(int x = 0; x < width; x++)

{

histogramArray[targetArray[y, x]]++;

}

scale = 255.0 / (width * height);

summary = 0;

for(int x = 0; x < 256; x++)

{

summary += histogramArray[x];

lutArray[x] = (int)(summary * scale + 0.5);

}

for(int y = 0; y < height; y++)

{

for(int x = 0; x < width; x++)

{

targetArray[y, x] = lutArray[targetArray[y, x]];

}

#endregion