Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.881834278573
Darker point darker score: not computed since the judgement is "E"
darker: 2 (eq: False, dd: False), confidence: 2, worker: AR50UBGSH10FJ (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A2K9VAUQ9I7CLT
darker: E (eq: True, dd: None), confidence: 2, worker: A23RB1Y4ANXQLS
darker: E (eq: True, dd: None), confidence: 2, worker: A234WZ4KX8IW07
darker: E (eq: True, dd: None), confidence: 2, worker: A1E9VI5RSZI31F
darker: E (eq: True, dd: None), confidence: 2, worker: A3Q9S2K93W2KDI (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A3A45A5YUM61LK
(0: guessing, 1: probably, 2: definitely)