Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.159865400997
Darker point darker score: not computed since the judgement is "E"
darker: E (eq: True, dd: None), confidence: 2, worker: A1NZVXB0S8DR04
darker: 2 (eq: False, dd: False), confidence: 0, worker: A3TO9R1Z7L6PZZ (marked invalid)
darker: E (eq: True, dd: None), confidence: 1, worker: AXKXTGJXLS3C9
darker: 2 (eq: False, dd: False), confidence: 0, worker: A3U65EZ76A3HCN
darker: E (eq: True, dd: None), confidence: 2, worker: A1NX9Q0EAOPYN3
darker: E (eq: True, dd: None), confidence: 2, worker: A2VVSQ1PSXKGVE
darker: E (eq: True, dd: None), confidence: 2, worker: A3Q9S2K93W2KDI (marked invalid)
(0: guessing, 1: probably, 2: definitely)