WPF：图像处理（五）迭代法

[csharp]
using System; 
 
namespace Splash.Imaging 
{ 
    /// <summary> 
    /// 图像处理：迭代法二值化阈值计算方法 
    /// </summary> 
    public static partial class Binarize 
    { 
        /// <summary> 
        /// 迭代法计算阈值 
        /// </summary> 
        /// <param name="grayArray">灰度数组</param> 
        /// <returns>二值化阈值</returns>  
        public static Int32 IterativeThreshold(Byte[,] grayArray) 
        {   // 建立统计直方图 
            Int32[] Histogram = new Int32[256]; 
            Array.Clear(Histogram, 0, 256);     // 初始化 
            foreach (Byte b in grayArray) 
            { 
                Histogram[b]++;                 // 统计直方图 
            } 
 
            // 总的质量矩和图像点数 
            Int32 SumC = grayArray.Length;    // 总的图像点数 
            Int32 SumU = 0; 
            for (Int32 i = 1; i < 256; i++) 
            { 
                SumU += i * Histogram[i];     // 总的质量矩                 
            } 
 
            // 确定初始阈值 www.2cto.com  
            Int32 MinGrayLevel = Array.FindIndex(Histogram, NonZero);       // 最小灰度值 
            Int32 MaxGrayLevel = Array.FindLastIndex(Histogram, NonZero);   // 最大灰度值