Question about pointsift_res_model and pointsift_model

[MrCrazyCrab]

@Fang-Haoshu @jmydurant @Jeff-sjtu Thanks for you excellent work, and i have a question about the function of pointsift_res_model and pointsift_model. I can't find any annotation in the code, i guess the second one is coded for the scale-awareness, but i'm not sure why the previous one is used for many times in the code, the two-stage network architecture points out it may be used for three times. Could you tell me the reason and give some annotation about the them?
Thanks, looking for you reply!

[largeword]

Well, both of them are PointSIFT Modules, but the difference is how the convolutions connect. In the period of downsampling, the auther used the first way. For the upsampling, the second way was used. You can refer to https://blog.csdn.net/JiangZuning/article/details/87904417