First instance segmentation training and prediction with lightning flash

Making an annotated Dataset:

125 grey-scaled images of overlapping pairs of chromosomes were annotated with makesense.ai. Annotation was saved in a single json file in COCO format:

Each image has two instances of a single "chromosome" label.

Loading and training a maskrcnn model

Lightning-flash was used to load and train a mask-rcnn model over the dataset:

Possible issue with the dataset.

The dataset has two instances of the same kind labeled as chromosome. The prediction yields only one mask: