large-area communicated extraction region

Motion region extraction

Transition region extraction

Coherence region boundary extraction

extraction of minimum irregular closed region

Region Feature Extraction

region of interesting extraction

along coastal region border region

Arid region and semiarid region

Bachu Region of Xin jiang Autonomous Region

Electric power transmission from western region to eastern region

gas conduction from western region to eastern region

infra-black region (blacker than black region)

Extraction and back extraction

extraction and back-extraction

Extraction or Non-Extraction Plan

extraction-anti-extraction

Extraction-Back-Extraction

Oil Extraction Office of No.3 Oil Extraction Factory