posec3d Network structure

[Sunshulong]

@kennymckormick Hello, thank you very much for your great work. Now I want to use torchinfo.summary to print the network structure of posec3d, but I don't know how much input_size should be written. The 17325656 in the paper is wrong, and the input 17486464 in the code is also wrong. Please help answer this question.