Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: E
Darker method: C
Equal score: 0.309038644883
Darker point darker score: not computed since the judgement is "E"
darker: 2 (eq: False, dd: True), confidence: 2, worker: A360B58589TBUS (marked invalid)
darker: 2 (eq: False, dd: True), confidence: 1, worker: A1MQPBGSL800TL
darker: 2 (eq: False, dd: True), confidence: 2, worker: A3NUDHU0ZTFI8H (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A90QPQO48C6RX
darker: E (eq: True, dd: None), confidence: 2, worker: A2CXAWVGQ6QQ2V
darker: E (eq: True, dd: None), confidence: 2, worker: A2CXAWVGQ6QQ2V
darker: E (eq: True, dd: None), confidence: 2, worker: A1NX9Q0EAOPYN3
(0: guessing, 1: probably, 2: definitely)