Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: E
Darker method: C
Equal score: 0.915750897612
Darker point darker score: not computed since the judgement is "E"
darker: 2 (eq: False, dd: True), confidence: 2, worker: A2I0M1XXACA4WE (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A1NO4LG6KGOGFD
darker: E (eq: True, dd: None), confidence: 2, worker: A3163PFOUKXQKA
darker: E (eq: True, dd: None), confidence: 2, worker: A237FGJCPV99GJ
darker: E (eq: True, dd: None), confidence: 2, worker: ADPVKKFJ886DJ
darker: E (eq: True, dd: None), confidence: 2, worker: A2VVSQ1PSXKGVE
(0: guessing, 1: probably, 2: definitely)