Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.397085166079
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 2, worker: A3QJ53C8CUTJTS (marked invalid)
darker: 2 (eq: False, dd: False), confidence: 2, worker: A3N6C8962TXPVH
darker: 2 (eq: False, dd: False), confidence: 1, worker: AX720MTAR52TX
darker: 1 (eq: False, dd: True), confidence: 2, worker: A14BFNH96MJQH
darker: 1 (eq: False, dd: True), confidence: 2, worker: A3J83K797QJ6QO (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A3HFS9E2FHNXDR
darker: E (eq: True, dd: None), confidence: 2, worker: A1H10UJNXTJDX4
darker: 2 (eq: False, dd: False), confidence: 2, worker: A1P2EVJXWYR94M (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A1NZVXB0S8DR04
darker: E (eq: True, dd: None), confidence: 2, worker: A237FGJCPV99GJ
(0: guessing, 1: probably, 2: definitely)