labelmeWithAI/examples/semantic_segmentation/README.md

Semantic Segmentation Example

Annotation

labelme data_annotated --labels="$(tr '\n' , < labels.txt)" --nodata

Convert to VOC-like Dataset

# It generates:
#   - data_dataset_voc/JPEGImages
#   - data_dataset_voc/SegmentationClass
#   - data_dataset_voc/SegmentationClassVisualization
./labelme2voc.py labels.txt data_annotated data_dataset_voc

Fig 1. JPEG image (left), PNG label (center), JPEG label visualization (right)
Note that the reason why the label file is mostly black is it contains only very low label values (ex. -1, 0, 4, 14).