v0.5

Use v1.2 of the dataset (203 -> 305 images)
Testing the tflite version of the model against the validation images of v1.2 of the dataset:

• dice score of version 0.3 of the model: 0.897
• dice score of version 0.4 of the model: 0.934
• dice score of version 0.5 of the model: 0.946