### **Sort tool**:

`blur` places most blurred faces at end of folder

`hist` groups images by similar content

`hist-dissim` places most similar to each other images to end.

`hist-blur` sort by blur in groups of similar content

`brightness` 

`hue`

`black` Places images which contains black area at end of folder. Useful to get rid of src faces which cutted by screen.

`final` sorts by yaw, blur, and hist, and leaves best 1500-1700 images.

Best practice for gather src faceset from tens of thousands images:

1) `black` -> then delete faces cutted by black area at end of folder
2) `blur` -> then delete blurred faces at end of folder
3) `hist` -> then delete groups of similar unwanted faces and leave only target face
4) `final` -> then delete faces occluded by obstructions

Best practice for dst faces:

1) delete first unsorted aligned groups of images what you can to delete. Dont touch target face mixed with others.
2) `hist` -> then delete groups of similar and leave only target face