Semantic Segmentation
التجزئة الدلالية
Semantic segmentation assigns a class label to every pixel — road, sky, worker, scaffold, ground — without distinguishing individual instances of the same class. Compare to instance segmentation, which separates two adjacent workers into Worker-1 and Worker-2. Modern architectures (Mask2Former, SegFormer, SAM 2 in semantic mode) reach 80%+ mean IoU…
Definition
Semantic segmentation assigns a class label to every pixel — road, sky, worker, scaffold, ground — without distinguishing individual instances of the same class. Compare to instance segmentation, which separates two adjacent workers into Worker-1 and Worker-2. Modern architectures (Mask2Former, SegFormer, SAM 2 in semantic mode) reach 80%+ mean IoU on Cityscapes. FI Tech runs semantic segmentation on drone orthomosaics for construction-progress monitoring: pixels classified as 'concrete' growing week over week prove vertical progress, while 'cleared earth' versus 'native vegetation' tracks earthworks completion against the BIM baseline.
