Does accumulate() in OpenCV 3.0.0 support the 3d Mat?

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Hi, guys.

I migrate opencv 3.0.0 recently. After the migration, the accumulate() in the following line throw an exception.

int sizes[] = {1, 512, 1024};

cv::Mat mat1(3, sizes, CV_32F, cv::Scalar(1);

cv::Mat mat2(mat.dims, mat1.row(0).sizes(), CV_32F, cv::Scalar(0));

for (int y = 0; y < 3; y ++) accumulate(mat1.row(y), mat2);

I changed the mat1's dimensions from 3 to 2 by squeeze() then there was no exception. Before the migration, the OpenCV's version is 2.4.9 and this codes works well.

I read the documentation of accumulate() in opencv 3.0.0. And it gives this function:

dst(x,y) = dst(x,y) + src(x,y) if mask != 0

Does this mean accumulate() in OpenCV 3.0.0 does not support 3d mat any more? What is the best practices if I want to accumulate the 3d Mat?

Thanks :)

Update: The matrix's dimension is 1x512x512. Then I used mat.squeeze() to get a 2d matrix to solve this problem. But I feel it's not efficient because the mat.squeeze() is called in the loop. I wonder if there is another way to solve this problem.