Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: E
Darker method: C
Equal score: 0.265292769263
Darker point darker score: not computed since the judgement is "E"
darker: 2 (eq: False, dd: True), confidence: 2, worker: A38TQC40K87G6I (marked invalid)
darker: 2 (eq: False, dd: True), confidence: 2, worker: A1N274L13ZKKI5
darker: E (eq: True, dd: None), confidence: 2, worker: A1XA2WJ50VR7KQ (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A13BDQ7J8MNP40
darker: E (eq: True, dd: None), confidence: 2, worker: A2ZRJMJTE6ID97
darker: E (eq: True, dd: None), confidence: 2, worker: AG0X3PQK2FWQJ
darker: E (eq: True, dd: None), confidence: 2, worker: A1XYJZ1AFNUURD
darker: E (eq: True, dd: None), confidence: 2, worker: A1MQPBGSL800TL
(0: guessing, 1: probably, 2: definitely)