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ValueError: y_max is less than or equal to y_min

See original GitHub issue

During training in MMDetection using this PR I got following error:

augmentations/bbox_utils.py", line 247, in check_bbox
    bbox=bbox,
ValueError: y_max is less than or equal to y_min for bbox [0.5390625, 0.6067708333333334, 0.541015625, 0.6067708333333334, 17].

I use only ShiftScaleRotate augmentation for bboxes:

type='ShiftScaleRotate',
        shift_limit=0.15,
        scale_limit=(0.0, 0.45),
        rotate_limit=10,
        interpolation=1,
        border_mode=0,
        p=0.5

bbox_params=dict(
            type='BboxParams',
            format='pascal_voc',
            label_fields=['gt_labels'],
            min_visibility=0.6,
            filter_lost_elements=True),

Version: 0.3.3

My original annotation of bboxes is correct. I think such ValueError can occur after ShiftScaleRotate when it modifies some of bboxes too much.

Can you please give some advice how to avoid such error?

Issue Analytics

State:
Created 4 years ago
Reactions:2
Comments:8

Top GitHub Comments

1reaction

albucommented, Sep 17, 2019

seems like a problem is in your data format. please send us few data points (boxes for one failing image should be enough). Everything is not valid without preprocessing.

0reactions

yzbxcommented, Apr 7, 2022

try to remove bbox with width/height=0, just set min_area=1 in BboxParams view https://albumentations.ai/docs/api_reference/core/composition/#albumentations.core.composition.BboxParams for detail

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