Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.122208567317
Darker point darker score: not computed since the judgement is "E"
darker: E (eq: True, dd: None), confidence: 1, worker: A106BTOUPN1KRV
darker: 1 (eq: False, dd: True), confidence: 0, worker: A2EW8H9R0T06M4
darker: 1 (eq: False, dd: True), confidence: 1, worker: A3D4U1VY8VSDI6 (marked invalid)
darker: 1 (eq: False, dd: True), confidence: 2, worker: A1NX9Q0EAOPYN3
darker: 1 (eq: False, dd: True), confidence: 1, worker: A2SNX0RFIPIO60
darker: E (eq: True, dd: None), confidence: 2, worker: A1XAOEDK0Y2KBT
(0: guessing, 1: probably, 2: definitely)