Machine Learning

NLP Learning Notes#02 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190 ...

重建个自己的avatar放metaverse里面跑 Human Face Reconstruction ReferencePIFuPIFu分为single-view surface reconstruction及multi-view surface reconstruction，但是实际上multi-view surface reconstruction就是对多个single-view的一个整合(比如简单粗暴的取平均值之类的)，故不多赘述。 PIFu，全称Pixel-Aligned Implicit Function，顾名思义，它与之前的做human digitalization的算法的不同之处在于两点，一个是Pixel-Aligned，一个是implicit function。关于pixel-aligned，之前的算法大多都是voxel-aligned，也就是将一个三维的数据，即voxel，放到model中训练，显然，这费时又费空间，而PIFu只先关注二维数据，再利用implicit function的优势，将深度参数$z(X)$放进隐式函数中求解。 首先声明一下implicit ...

NLP Learning Notes#01 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190 ...

First of all, let me give a basic intuition of $DQN$ (Deep Q-Network). It is composed of $D$ (deep learning) and $QN$ (Q-Network), among which the Q-Learning algorithm is the core and the neural network is just a tool to maintain the matrix in Q algorithm because of the memory limits (a $state \times actioin$ size of matrix is too big for most of the times). Algorithm DescriptionQ-LearningIt is explained in detail in this blog: A Painless Q-Learning Tutorial DQNSimilar to dynamic programming, th ...