Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: E
Darker method: C
Equal score: 0.312242130817
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: False), confidence: 1, worker: AOKJCDRWBS5MK
darker: E (eq: True, dd: None), confidence: 1, worker: A3RLTUXIM8TU3K (marked invalid)
darker: 2 (eq: False, dd: True), confidence: 2, worker: A14P86I4JB46ET
darker: E (eq: True, dd: None), confidence: 2, worker: A3UKUFHOITA6JF
darker: E (eq: True, dd: None), confidence: 2, worker: A1GY0P2ZEJ1RK7
darker: E (eq: True, dd: None), confidence: 2, worker: A13QL2FY4BZR9B
(0: guessing, 1: probably, 2: definitely)