Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.90688008579
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 1, worker: A1KWFRKBCLPQXZ (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A2XVUD9MH52HYU
darker: E (eq: True, dd: None), confidence: 2, worker: A14PFRHG0A2YY9
darker: 1 (eq: False, dd: True), confidence: 2, worker: AO2JIXLS5MIC5 (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A1GY0P2ZEJ1RK7
darker: 1 (eq: False, dd: True), confidence: 2, worker: A1ZH2G3ICIOPT2 (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: AU4FF0366TBAR (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: AEHEZAYCPWF0E
darker: E (eq: True, dd: None), confidence: 2, worker: A3IPKVTS5K06LP
(0: guessing, 1: probably, 2: definitely)