c++ - opencv Mat ::convertTo assertion error

Question

Mat sample(400,image_queue[i].size(),CV_32FC1);
image_queue[i][j].reshape(0,1).convertTo(sample.col(j),CV_32FC1,1/255.0);

我想把 image_queue[i][j]这张图（CV_8UC，灰度图，20*20）作为sample的一列。执行第二句的时候报异常。!

搞不懂为什么。求教！

Answer 1

Mat sample(400,image_queue[i].size(),CV_32FC1);

The image_queue[i].size() is the length of one side of your image matrix, right? Is there any correspondence with the size of the image?