Is there some way to calculate anchor boxes for my own dataset?

[Vladislav Artemyev]

I try to train this model on my own dataset. I created the structure of folder similar to kitti. I have the same size of image as KITTI. But my dataset has various sizes of objects and I think that anchors for KITTI doesn't fit it. F.e. there is a special script for YOLO v2 based on k-means to create anchors depends on train samples. Is there some way to calculate anchor boxes for my own dataset?

[andreapiso]

Can't you just use k-means on the boxes of your dataset?

[Tejas]

Do we have to run k-means only on height and width parameters of GT bboxes for squeezeDet model?
I guess cx and cy are already being calculated in set_anchors method of kitti_squeezeDet_config.py. Please confirm!

[andreapiso]

Anchor boxes are just shapes, what would be the meaning of calculating their center?

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On Fri, 9 Feb 2018 at 9:33 PM, Tejas ***@***.***> wrote: Do we have to run k-means only on height and width parameters of GT bboxes for squeezeDet model? I guess cx and cy are already being calculated in set_anchors method of kitti_squeezeDet_config.py. Please confirm! — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#57 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AN_wJm5n1mP1kPFA72BHw4GAzCFanyD8ks5tTEkogaJpZM4N4g9I> .

[Sebastian Cygert]

@AndreaPisoni - can you please explain in more detail how the anchorse should be chosen using K-means, or give any link? Given I have W*H custom dataset, and X number of classes.

My current understanding is that I should run k-means on the size (W x H) of all gt-boxes, and then take top N (lets say 9 as in current config)?

EDIT: anchor generation is described here :https://arxiv.org/pdf/1606.01561.pdf. Basically run K-Means on width, and heights of boxes, where K is a hyperparameter but you can easily leave it as it is (9).