Mmdetection: How to use coco dataset?

[blackCmd]

I've read guide documentation

https://mmdetection.readthedocs.io/en/latest/tutorials/new_dataset.html#customize-datasets-by-reorganizing-data

very many times but i don't know how to make it.
How can i configure?

Plz help me. Thank you.

[azibit]

In what format do you have your data? Is it in the coco format?

[blackCmd]

In what format do you have your data? Is it in the coco format?

oh, yes i have coco datasets already : )

[azibit]

Let us assume you are using the mask_rcnn_r50_fpn_2x_coco for Instance Segmentation, then you can edit the class mmdetection/mmdet/datasets/coco.py and change the CLASSES to the classes you have.

Then you also edit the class 'configs/_base_/models/mask_rcnn_r50_fpn.py', and replace the num_classes with the number of classes you have, then you should be fine.

This is basically what I do. Do let me know if that works for you.

[blackCmd]

Let us assume you are using the mask_rcnn_r50_fpn_2x_coco for Instance Segmentation, then you can edit the class mmdetection/mmdet/datasets/coco.py and change the CLASSES to the classes you have.

Then you also edit the class 'configs/_base_/models/mask_rcnn_r50_fpn.py', and replace the num_classes with the number of classes you have, then you should be fine.

This is basically what I do. Do let me know if that works for you.

Oh! This is the long-awaited news for me!
OK I'm gonna try it now and I'll reply to you if it works or not

I've edited all that you said.

1. I changed CLASSES = ('person', 'bycycle', 'car' ... etc) to CLASSES = ('person') in mmdetection/mmdet/datasets/coco.py.
2. I changed num_classes=80 to num_classes=1 in mmdetection/configs/_base/models/mask_rcnn_r50_fpn.py.

Then I've tried to train python mmdetection/tools/train.py mmdetection/configs/detectors/mask_rcnn_r50_fpn_2x_coco.py in terminal.

But I got an error like this.

It seems to works for training but not evaluation.
Are there any things that I edited?

[azibit]

For some weird python reasons which I am not sure of, you need to have CLASSES = ('person', ) with the comma at the end rather than just having CLASSES = ('person') without the comma. Try that and let me know how that goes

[blackCmd]

For some weird python reasons which I am not sure of, you need to have CLASSES = ('person', ) with the comma at the end rather than just having CLASSES = ('person') without the comma. Try that and let me know how that goes

Oh, I mistake annotation file plz wait. Thanks @azibit u r angel.

Oh, bro, reason of the error is my annotation file's "category_id". After i edit CLASSES = ('person') training process works well!
I got a beautiful results.

Thank you @azibit.
I owe you big time. You're a lifesaver Thanks.

[azibit]

You are most welcome @blackCmd I wish you all the very best. Do let me know if you need anything else

[hellock]

https://mmdetection.readthedocs.io/en/latest/tutorials/new_dataset.html#modify-classes-of-existing-dataset