Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.940904065189
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 2, worker: A7WI4XSAIFD7J (marked invalid)
darker: E (eq: True, dd: None), confidence: 1, worker: A28P3ZGZB3XG9P
darker: E (eq: True, dd: None), confidence: 0, worker: A2Q1A5H715C3EK
darker: E (eq: True, dd: None), confidence: 2, worker: A1JEDFDBWHLA1F
darker: E (eq: True, dd: None), confidence: 2, worker: A3QTG4DHHV2KD6
darker: E (eq: True, dd: None), confidence: 2, worker: A1IOJ2LGMGISYM
(0: guessing, 1: probably, 2: definitely)