Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.213321836968
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 2, worker: AQD91RFHV1WNE (marked invalid)
darker: 2 (eq: False, dd: False), confidence: 2, worker: AHLVAVDNE9WI0
darker: 2 (eq: False, dd: False), confidence: 0, worker: A29LON3TC6GCJN
darker: 2 (eq: False, dd: False), confidence: 1, worker: AO6J6WQVRE5YZ (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A1OA3O78YDXGZO
darker: E (eq: True, dd: None), confidence: 2, worker: A350DTTUYQLHKJ
darker: E (eq: True, dd: None), confidence: 2, worker: ASOOONBGQ48YI
(0: guessing, 1: probably, 2: definitely)