Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: E
Darker method: C
Equal score: 0.504342861654
Darker point darker score: not computed since the judgement is "E"
darker: 2 (eq: False, dd: True), confidence: 1, worker: A3TO9R1Z7L6PZZ (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: AGY2PTZLZFT2L
darker: 2 (eq: False, dd: True), confidence: 2, worker: A2BG6O1B5B3F78
darker: 2 (eq: False, dd: True), confidence: 1, worker: AR50UBGSH10FJ (marked invalid)
darker: E (eq: True, dd: None), confidence: 1, worker: A26N0ZAW34UJUV
darker: E (eq: True, dd: None), confidence: 2, worker: A234WZ4KX8IW07
darker: E (eq: True, dd: None), confidence: 0, worker: A1NX9Q0EAOPYN3
(0: guessing, 1: probably, 2: definitely)