Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.13285772318
Darker point darker score: not computed since the judgement is "E"
darker: E (eq: True, dd: None), confidence: 1, worker: A2FQSVTAOL5GUC
darker: 2 (eq: False, dd: False), confidence: 0, worker: A2OF0GTKWKM2T5
darker: 2 (eq: False, dd: False), confidence: 2, worker: AJBQ5XEHIF9Z1 (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A30M7MYW1BHQN1
darker: E (eq: True, dd: None), confidence: 2, worker: AGY2PTZLZFT2L
darker: 1 (eq: False, dd: True), confidence: 2, worker: A1L3348HFKSWBJ (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A32M5FDKCPHMA
(0: guessing, 1: probably, 2: definitely)