Results 4 issues of liumz

Can I use superpoint+superglue to replace extract feature method and match feature method in OpenSFM?

sfm-reconstruction

If using pnp to recover shot pose, in fact, only tracks, which tracks length are more than 3, are used. And it ignores the relation between match pairs not reconstructed.

sfm-reconstruction

Hello, thanks for your works! Have you implemented the auxiliary loss? And where is it?

### 2.11.4节 最后一步求导结果:$\frac{n}{\sigma^2}[\mu - (x_1+x_2+...+x_n)] $ 应为:$\frac{1}{\sigma^2}[n\mu - (x_1+x_2+...+x_n)] $ ### 2.12.4 第三步,计算对$\theara_{i}$的导数应为: $\frac{1}{m}\sum^{m}_{j=0}(h_\theta (x^{(j)}_0,x^{(j)}_1,...,x^{(j)}_n)-y_j)x^{(j)}_i$