Flow-based Generative Model

视频讲解

https://www.bilibili.com/video/BV1Wv411h7kN?p=67&vd_source=909d7728ce838d2b9656fb13a31483ca

Jacobian Matrix

Determinant

change of variable theorem

所以经过上面的推导后得到:

flow based generative model

下面是正式关于flow based generative model的介绍:

整体推导

因为计算雅克比行列式很贵,所以往往想让矩阵是一个三角阵,这样就只用考虑对角线上的元素:

例如NICE:

Pixel RNN

https://www.youtube.com/watch?v=-FFveGrG46w&t=1003s