Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: E
Darker method: C
Equal score: 0.088850464833
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: False), confidence: 1, worker: A3PEMQP28HYGHU
darker: 2 (eq: False, dd: True), confidence: 2, worker: A2XU16B4I9XQG5 (marked invalid)
darker: 2 (eq: False, dd: True), confidence: 2, worker: AHLVAVDNE9WI0
darker: E (eq: True, dd: None), confidence: 1, worker: A1NPKI9KKWOI2P
darker: E (eq: True, dd: None), confidence: 2, worker: A3JJAFR9BRLG0
darker: E (eq: True, dd: None), confidence: 2, worker: A3A45A5YUM61LK
(0: guessing, 1: probably, 2: definitely)