Table 4 Comparison of annotation density across datasets

From: Semantic segmentation of building façade materials and colors for urban conservation

Dataset

Annotation segments

Images

Annotation segments per image

OpenSurfaces21

137k

19,447

7.04

LMD26

9.4k

5845

1.61

DMS19

3200k

44,560

71.81

BFMS

337k

530

654.37