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We show that intrinsic image methods can be used to refine an initial , low-frequency shading estimate based on a global lighting reconstruction from an original texture and coarse scene geometry in order to resolve the inherent global ambiguity in shading .
 used for: intrinsic image methods, initial , low-frequency shading estimate; used for: initial , low-frequency shading estimate, inherent global ambiguity in shading; used for: global lighting reconstruction, intrinsic image methods; feature of: texture and coarse scene geometry, global lighting reconstruction
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
 Entity Pairs:  intrinsic image methods, initial , low-frequency shading estimate; initial , low-frequency shading estimate, inherent global ambiguity in shading; global lighting reconstruction, intrinsic image methods; texture and coarse scene geometry, global lighting reconstruction 
Answer:
 used for: intrinsic image methods, initial , low-frequency shading estimate; used for: initial , low-frequency shading estimate, inherent global ambiguity in shading; used for: global lighting reconstruction, intrinsic image methods; feature of: texture and coarse scene geometry, global lighting reconstruction