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Our proposed algorithm first estimates camera viewpoint using rigid structure-from-motion , then reconstructs object shapes by optimizing over visual hull proposals guided by loose within-class shape similarity assumptions .
 used for: algorithm, camera viewpoint; used for: algorithm, object shapes; used for: rigid structure-from-motion, algorithm; used for: visual hull proposals, object shapes; used for: loose within-class shape similarity assumptions, visual hull proposals
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 used for: algorithm, camera viewpoint; used for: algorithm, object shapes; used for: rigid structure-from-motion, algorithm; used for: visual hull proposals, object shapes; used for: loose within-class shape similarity assumptions, visual hull proposals