dim3 block(BLOCK_X, BLOCK_Y);
dim3 grid((roi.width + block.x - 1) / block.x, (roi.height + block.y - 1) / block.y);dim3 grid((roi.wid
dim3 block(BLOCK_X, BLOCK_Y);
dim3 grid((roi.width + block.x - 1) / block.x, (roi.height + block.y - 1) / block.y);dim3 grid((roi.wid