Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.146872459106
Darker point darker score: not computed since the judgement is "E"
darker: E (eq: True, dd: None), confidence: 1, worker: A1SRPH3BGCHUOA
darker: 1 (eq: False, dd: True), confidence: 2, worker: A1H30MGYWO1MWS (marked invalid)
darker: 1 (eq: False, dd: True), confidence: 2, worker: A2YYHNACJ8MFTU
darker: 1 (eq: False, dd: True), confidence: 2, worker: A2FNC7KTCBF9IT
darker: E (eq: True, dd: None), confidence: 0, worker: A1QXQBZE7ROQ4F
darker: 1 (eq: False, dd: True), confidence: 2, worker: A2Q5IX1YGGLQML (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A1JHVZIC3FH9LG
darker: 1 (eq: False, dd: True), confidence: 2, worker: AJSZEUBV1O00K (marked invalid)
(0: guessing, 1: probably, 2: definitely)