Matlab的filter2在OpenCV中的等效功能 [英] Equivalent function of Matlab's filter2 in OpenCV

问题描述

我需要将以下matlab代码转换为OpenCV，并获得完全相同的结果.

I need to convert the following matlab code into OpenCV and obtain exactly the same result.

在matlab中:

A = [1 2 3];
f = [4 5 6];
result = filter2(f, A);

结果如下:

result = [17    32    23]

在OpenCV中，我尝试了以下几行:

In OpenCV, I tried these lines:

cv::Mat A = (cv::Mat_<float>(1, 3) << 1, 2, 3);
cv::Mat f = (cv::Mat_<float>(1, 3) << 4, 5, 6);
cv::Mat result;
cv::filter2D(A, result, -1, f, cv::Point(-1, -1), 0, cv::BORDER_REPLICATE);

这给了我

result = [21 32 41]

如何获得与Matlab相同的结果?我怀疑OpenCV中的锚点会导致这种差异，但是我不知道如何更改它.提前致谢.

How can I obtain the same result as of Matlab?? I doubt the anchor point in OpenCV causes this difference, but I cannot figure out how to change it. Thanks in advance.

推荐答案

使用cv::BORDER_CONSTANT，它将数组填充为零，而不是复制相邻元素:

Use cv::BORDER_CONSTANT, which pads the array with zero rather than duplicating the neighboring element:

cv::filter2D(A, result, -1, f, cv::Point(-1, -1), 0, cv::BORDER_CONSTANT);

结果是:

result = [17, 32, 23]

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