Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.902210381067
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 1, worker: A3RLTUXIM8TU3K (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A12DV2RIAQPV5J
darker: E (eq: True, dd: None), confidence: 2, worker: A3128LS551616K
darker: 1 (eq: False, dd: True), confidence: 2, worker: AH7WFV2TQYEW0 (marked invalid)
darker: E (eq: True, dd: None), confidence: 1, worker: AMDW925P9IY2O
darker: E (eq: True, dd: None), confidence: 2, worker: A2YUBS32Z1NI59
darker: E (eq: True, dd: None), confidence: 0, worker: A3TVDFJ22T1FFN (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A2SNX0RFIPIO60
(0: guessing, 1: probably, 2: definitely)