Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.897275869899
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 2, worker: ATPCAF2RU1G4C (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A2A42CU48PN8CX
darker: E (eq: True, dd: None), confidence: 2, worker: A251KVXCS8E3C
darker: E (eq: True, dd: None), confidence: 2, worker: A13BDQ7J8MNP40
darker: E (eq: True, dd: None), confidence: 1, worker: A3GFISRU6V2MG5
darker: 1 (eq: False, dd: True), confidence: 2, worker: AP29T5XPOQKG2 (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A1NF6PELRKACS9
(0: guessing, 1: probably, 2: definitely)