Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 1.04473530043
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 1, worker: A3FZ7C7M6VD21M (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A234WZ4KX8IW07
darker: E (eq: True, dd: None), confidence: 2, worker: A3DKW5X4Y1Z6UD
darker: E (eq: True, dd: None), confidence: 1, worker: AYLD14EI9Q925
darker: E (eq: True, dd: None), confidence: 1, worker: A2G053HOWRCZZ6 (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A2SP7LV6H5D0HO
darker: E (eq: True, dd: None), confidence: 2, worker: A3NWQ0535HAXUD
(0: guessing, 1: probably, 2: definitely)