Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.50755287206
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 1, worker: AHLVAVDNE9WI0
darker: 2 (eq: False, dd: False), confidence: 2, worker: A7DN8E3C7IWLI (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A3454T4PU9GJM0
darker: E (eq: True, dd: None), confidence: 2, worker: A2ZRJMJTE6ID97
darker: 1 (eq: False, dd: True), confidence: 1, worker: A2G053HOWRCZZ6 (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A2SNX0RFIPIO60
darker: E (eq: True, dd: None), confidence: 2, worker: A1D2E3QRL7O43T
(0: guessing, 1: probably, 2: definitely)