Java 用平行对角线将矩阵分块

我有个问题。我想用（45和-45）度的平行对角线将图像分割成块。 你能帮我怎么追踪我的像素矩阵吗？”

我试着为这个方法写一些代码。我把一个宽度和高度相等的矩阵分成两个三角形。你知道（I，j）=（0,0）在图像矩阵的左上方，所以直到对角线是一个三角形，然后是另一个三角形。 这是我的密码

public static int[] getBlackNo_45Degree(int[][] pixels, int sectionNo){
        int height = pixels.length;
        int width = pixels[0].length;
        System.out.println(width +" - " +height);
        int [] blackNo_Diagonal = new int[sectionNo];
        int section = (height / sectionNo )* 2;
        int temp =0, index = section, blackNo = 0, arrayIn =0;

        for(int count= 0 ; count<sectionNo/2 ; count++){
            blackNo = 0;
            for(int row = temp; row< index ; row++ ){
                int rowIndex = row ;
                for(int col= 0 ; col <= row ; col++){
            //      System.out.println("row-col :"+rowIndex +"-"+col);
                    int rgb = pixels[rowIndex --][col];

                    if(rgb == Color.BLACK.getRGB())
                        blackNo ++;

                }
            }
            blackNo_Diagonal[arrayIn++]= blackNo;
            temp += section;
            index += section;
            System.out.println(blackNo);
        }
        temp = 0;
        index = section;
        for(int count= 0 ; count<sectionNo  /2 ; count++){
            blackNo = 0;
            for(int col= temp +1 ; col <= index  ; col++){
                int colIndex = col;
                for(int row= (height -1) ; colIndex < width ; row--){
                //System.out.println("row-col :"+row +"-"+colIndex);
                    int rgb = pixels[row][colIndex++];
                    if(rgb == Color.BLACK.getRGB())
                        blackNo ++;


                } 
            }
            blackNo_Diagonal[arrayIn++]= blackNo;
            temp += section;
            index += section;
            System.out.println(blackNo);
        }
        return  blackNo_Diagonal;
    }

输出：

row-col :0-0
row-col :1-0
row-col :0-1
3
row-col :2-0
row-col :1-1
row-col :0-2
row-col :3-0
row-col :2-1
row-col :1-2
row-col :0-3
4
row-col :3-1
row-col :2-2
row-col :1-3
row-col :3-2
row-col :2-3
2
row-col :3-3
1

---

“您能帮助我如何跟踪像素矩阵吗？”为了更快地获得更好的帮助，请发布您的尝试（图像的热链接）。我编辑了我的问题，请重新阅读。“您能帮助我如何跟踪像素矩阵吗？”为了更快地获得更好的帮助，请发布您的尝试（图像的热链接）。我编辑了我的问题，请重新阅读。

row-col :0-0
row-col :1-0
row-col :0-1
3
row-col :2-0
row-col :1-1
row-col :0-2
row-col :3-0
row-col :2-1
row-col :1-2
row-col :0-3
4
row-col :3-1
row-col :2-2
row-col :1-3
row-col :3-2
row-col :2-3
2
row-col :3-3
1