Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: E
Darker method: C
Equal score: 0.970515201225
Darker point darker score: not computed since the judgement is "E"
darker: E (eq: True, dd: None), confidence: 0, worker: A1NX9Q0EAOPYN3
darker: 2 (eq: False, dd: True), confidence: 0, worker: A3TO9R1Z7L6PZZ (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A3P8OM5PDCFZNE
darker: E (eq: True, dd: None), confidence: 2, worker: A1GY0P2ZEJ1RK7
darker: E (eq: True, dd: None), confidence: 2, worker: AZ9A137H25EDX
darker: E (eq: True, dd: None), confidence: 2, worker: A2YYHNACJ8MFTU
(0: guessing, 1: probably, 2: definitely)