Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: E
Darker method: C
Equal score: 0.893842991979
Darker point darker score: not computed since the judgement is "E"
darker: 2 (eq: False, dd: True), confidence: 1, worker: A3TO9R1Z7L6PZZ (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A12DV2RIAQPV5J
darker: 2 (eq: False, dd: True), confidence: 2, worker: A2XU16B4I9XQG5 (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A39SAJGZKMYJE9 (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: AIKBREX7SEPXE
darker: E (eq: True, dd: None), confidence: 2, worker: A3IPKVTS5K06LP
darker: E (eq: True, dd: None), confidence: 2, worker: A2K9VAUQ9I7CLT
darker: E (eq: True, dd: None), confidence: 2, worker: A10QRO2MWG7AZ7
(0: guessing, 1: probably, 2: definitely)