Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.468955521065
Darker point darker score: not computed since the judgement is "E"
darker: E (eq: True, dd: None), confidence: 2, worker: A1GYFJ7J6KNOV7
darker: 1 (eq: False, dd: True), confidence: 1, worker: A3RLTUXIM8TU3K (marked invalid)
darker: 2 (eq: False, dd: False), confidence: 2, worker: A29LON3TC6GCJN
darker: E (eq: True, dd: None), confidence: 2, worker: A1NJB5LJJPC7AS
darker: E (eq: True, dd: None), confidence: 2, worker: A325FINFEL3NH8 (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: ADN5X9XAX18JA
darker: E (eq: True, dd: None), confidence: 2, worker: A1NZVXB0S8DR04
(0: guessing, 1: probably, 2: definitely)