解释这行代码 dst1.at<Vec3b>(row, col) = Vec3b(0, 0, 0);
时间: 2023-06-09 11:02:52 浏览: 152
这行代码是用来将目标图像(dst1)中指定位置(row, col)的像素值修改为黑色(0, 0, 0)的。其中Vec3b是OpenCV库中定义的一个数据类型,表示一个三通道像素值(BGR)。利用该函数可以进行图像处理和修改。
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解释这段代码: Mat dst1 = Mat::zeros(markers.size(), CV_8UC3); int index = 0; for (int row = 0; row < markers.rows; row++) { for (int col = 0; col < markers.cols; col++) { index = markers.at<int>(row, col); if (index > 0 && index <= contours.size()) { dst1.at<Vec3b>(row, col) = colors[index - 1]; } else { dst1.at<Vec3b>(row, col) = Vec3b(0, 0, 0); } } }
) { dst1.at<Vec3b>(row, col) = colors[index - 1]; } } }
这段代码实现了一个 markers 矩阵到 dst1 图像的转换,其中 markers 包含了像素的聚类信息,每个像素所属的聚类用一个整数来表示。颜色信息在 colors 数组中,每个聚类对应一个颜色。循环中,遍历每个像素的聚类编号,如果该编号大于0,则在 dst1 中将该像素的颜色改为对应聚类的颜色。
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