Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.0511923714573
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 1, worker: AVPCUQOQEPTCI
darker: E (eq: True, dd: None), confidence: 1, worker: A7YR8O19WNQCS
darker: 1 (eq: False, dd: True), confidence: 1, worker: A27H0BKXDPJ543
darker: 1 (eq: False, dd: True), confidence: 1, worker: A341BRCJQJDXRV (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A7DN8E3C7IWLI (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A1WRANKL1HRGYW
darker: E (eq: True, dd: None), confidence: 2, worker: A3A45A5YUM61LK
(0: guessing, 1: probably, 2: definitely)