Android NDK OpenCV背景消除建模（新Demo附源码）

//根据总的图片数生成当前的图片矩形
private RectF CreateBitmapRect(int bitmapidx, int totalbitmap, int totalweight, int totalheight) {
    int rectleft, rectright, recttop, rectbottom;
    int bitmapweight, bitmapheight;

    RectF rectF=null;
    if (totalbitmap > 1 && bitmapidx <= totalbitmap) {
        //求最合适的比例,求平方根
        int rowcol=(int) Math.ceil(Math.sqrt(totalbitmap));

        //计算矩形的，如果总数和计算的平方根数一样，那只分列，不分行
        if (rowcol == totalbitmap) {
            bitmapweight=totalweight / rowcol; //宽度
            bitmapheight=totalheight;          //高度
            rectleft=bitmapidx * bitmapweight;//左
            recttop=0;                        //上
            rectright=rectleft + bitmapweight;           //右
            rectbottom=recttop + bitmapheight;          //下
        } else {
            int row=bitmapidx / rowcol;  //第几行
            int col=bitmapidx % rowcol;  //第几列
            bitmapweight=totalweight / rowcol; //宽度
            bitmapheight=totalheight / rowcol;//高度
            rectleft=col * bitmapweight;  //左
            recttop=row * bitmapheight;   //上
            rectright=rectleft + bitmapweight;  //右
            rectbottom=recttop + bitmapheight; //下
        }
        rectF=new RectF(rectleft, recttop, rectright, rectbottom);
    } else {
        rectF=new RectF(0, 0, totalweight, totalheight);
    }

    return rectF;
}