Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.973059425095
Darker point darker score: not computed since the judgement is "E"
darker: 2 (eq: False, dd: False), confidence: 1, worker: A3RLTUXIM8TU3K (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A3QTG4DHHV2KD6
darker: E (eq: True, dd: None), confidence: 2, worker: A3FVPDNQQLDFZH
darker: E (eq: True, dd: None), confidence: 2, worker: A7S0IDTDA59QN
darker: E (eq: True, dd: None), confidence: 2, worker: A3NWQ0535HAXUD
darker: E (eq: True, dd: None), confidence: 2, worker: A2RUHINET2E1C5 (marked invalid)
darker: E (eq: True, dd: None), confidence: 1, worker: A277RSAE4AKWW0
(0: guessing, 1: probably, 2: definitely)