这是可能的(您可以并行化).我遇到了完全相同的问题，并以这种方式解决了(请参阅我对这个问题的回答，以及python代码).

This is possible (you can parallelize). I had exactly the same issue, and solved it this way (see my answer to that problem, with python code).

https://dsp.stackexchange.com/questions/667/image -pyramid-without-decimation/55654#55654