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buptxyb666 avatar buptxyb666 commented on June 16, 2024
  1. z['ap'] 只是用于可视化,没有显示的监督,adaptivepose使用中心特征预测ap偏移,再取出ap位置的特征第二跳偏移,整个两跳path是梯度可回传的,所以相当于隐式监督的。
  2. Resample2D就是warp操作,通过双线性插值取ap位置特征。self.gradient_mul这块意思跟降低该层的学习率一个意思。
  3. 我这边实验效果 oks+L1 > oks > L1。先RegWeightedL1Loss_coco(),再oks这个操作你可以自己试试。自己的数据集如果是人体关键点你直接按着coco取对应位置的sigma就可以了,sigma跟数据集无关。算oks的时候把中心坐标加到偏移上了,建议仔细看看

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caiusy avatar caiusy commented on June 16, 2024

@buptxyb666
off_to_pose中将中心坐标加到偏移上, 是我没看清楚。 sigma的话我想问的是如果不是人体关键点的话, 该怎么估算呢?

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buptxyb666 avatar buptxyb666 commented on June 16, 2024

首先认为标注过程符合高斯分布,sigma 跟 scale这俩参数乘积,就是高斯分布的方差,直觉上理解就是对偏差的容忍度,比如同样偏移五个像素,可能对于eye的预测误差就是不可容忍的,对于hip的预测误差是可容忍的,对于large scale是可容忍的,对small scale是不可容忍的。coco上提供的标注,也是脸部关键点的sigma最小,其他的大一些,你可以按着这个思路来估算下你所估计的点的sigma。

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caiusy avatar caiusy commented on June 16, 2024

好的 谢谢了

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