The meaning of lighting augmentation

[voldemortX]

Hi! I'm trying to understand what is the lighting augmentation? Are the eigen values representative of a light source & do I need to compute them for other datasets?

Could you help me with this @liuruijin17, thanks very much!

[liuruijin17]

The lighting functions come from CornerNet. And in their paper, they said "we adopt standard data augmentation including ..., random color jittering. Finally, we apply PCA to the input image." So the lighting augmentation here is to highlight the network the most principal image features.

You could compute them from other datasets, which would be more reasonable since not all datasets share the same intensity distribution.

[voldemortX]

Thanks! So the numbers from your repo at the moment are the ones from COCO dataset?

[liuruijin17]

You're welcome.

Maybe. There are no comments from CornerNet's authors.

This question also shows up in CornerNet's repo, such as
issue 163, 85, 75, but no responses.

[voldemortX]

@liuruijin17 Yes, I see that. Since princeton-vl/CornerNet#163 is open, I'll close this one and post future inquiries there.