Troubleshooting
Problem
When certain augmentations are performed on a dataset containing objects annotated with polygon segments, the objects are not positioned correctly.
The augmentations that can exhibit this problem are 'rotation', 'cropping', 'horizontal flip', and 'vertical flip'.
The problem is that the polygon segmented object does not align with the object in the augmented image. It may be slightly off center, or it may be in an entirely different location in the augmented image.
There have been two instances where this problem has been observed.
1. The problematic image has an original filename that ends in ".jpeg".
2. The problematic image is an image frame extracted from a video uploaded to the dataset.
This problem only affects MVI version 8.9.x (MAS 8.11.x) and 9.0.0.
Symptom
Polygon segment label annotations are in the wrong location on an image that is augmented.
Cause
The cause appears to be that the EXIF rotation information in the augmented image is not being properly observed.
Resolving The Problem
There are different workarounds for the two scenarios listed above.
- In the case that the original filename on the uploaded image ends in ".jpeg", change the file name to end in ".jpg" before uploading the image.
- In the case that a video frame contains improper polygon segment annotation, extract the frames outside of MVI and upload the frames individual instead of uploading the video and extracting the frames within MVI.
Document Location
Worldwide
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Document Information
Modified date:
24 June 2024
UID
ibm17157867