WPF：图像处理（三）二值化(2)

            else 
                threshold = IterativeThreshold(GrayArray); 
 
            // 根据阈值进行二值化 www.2cto.com  
            Int32 PixelHeight = bitmap.PixelHeight; 
            Int32 PixelWidth = bitmap.PixelWidth; 
            Byte[,] BinaryArray = new Byte[PixelHeight, PixelWidth]; 
            for (Int32 i = 0; i < PixelHeight; i++) 
            { 
                for (Int32 j = 0; j < PixelWidth; j++) 
                { 
                    BinaryArray[i,j] = Convert.ToByte((GrayArray[i,j] > threshold) ? 255 : 0); 
                } 
            } 
 
            return BinaryArray; 
        } 
 
        /// <summary> 
        /// 全局阈值图像二值化 
        /// </summary> 
        /// <param name="bitmap">原始图像</param> 
        /// <param name="method">二值化方法</param> 
        /// <param name="threshold">输出：全局阈值</param> 
        /// <returns>二值化图像</returns> 
        public static BitmapSource ToBinaryBitmap(this BitmapSource bitmap, BinarizationMethods method, out Int32 threshold) 
        {   // 位图转换为灰度数组 
            Byte[,] GrayArray = bitmap.ToGrayArray(); 
 
            // 计算全局阈值 
            if (method == BinarizationMethods.Otsu) 
                threshold = OtsuThreshold(GrayArray);