Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: E
Darker method: C
Equal score: 0.0216281508768
Darker point darker score: not computed since the judgement is "E"
darker: 2 (eq: False, dd: True), confidence: 1, worker: A1JF9ZNXWK5QZU (marked invalid)
darker: 1 (eq: False, dd: False), confidence: 2, worker: A3LSDO3YPF1SFT
darker: E (eq: True, dd: None), confidence: 2, worker: A1DDY93NB8NESD
darker: E (eq: True, dd: None), confidence: 1, worker: A17AF8T628J0B9
darker: 1 (eq: False, dd: False), confidence: 2, worker: A2A1D52ZPSW6L9
darker: E (eq: True, dd: None), confidence: 2, worker: A3RR91G2KJO9NI
(0: guessing, 1: probably, 2: definitely)