Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.908386541488
Darker point darker score: not computed since the judgement is "E"
darker: E (eq: True, dd: None), confidence: 0, worker: A21AVVEQUEX7DA (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: AXHC7OMH8XE9U
darker: E (eq: True, dd: None), confidence: 2, worker: A2KJ983WWTEK4L
darker: E (eq: True, dd: None), confidence: 2, worker: A32M5FDKCPHMA
darker: 2 (eq: False, dd: False), confidence: 2, worker: A2H321P1NSEW35
darker: 2 (eq: False, dd: False), confidence: 1, worker: A3FZ7C7M6VD21M (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A1JHDIQ9MNML5N
(0: guessing, 1: probably, 2: definitely)