Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.159044710714
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 2, worker: AR50UBGSH10FJ (marked invalid)
darker: 1 (eq: False, dd: True), confidence: 2, worker: A2436ASG7TKY0L
darker: E (eq: True, dd: None), confidence: 1, worker: A2C5CT4Y35F75B
darker: E (eq: True, dd: None), confidence: 0, worker: A3VO5CW9ZY22MZ
darker: E (eq: True, dd: None), confidence: 2, worker: AKG5TLUQ2WWED
darker: 1 (eq: False, dd: True), confidence: 2, worker: A7S0IDTDA59QN
(0: guessing, 1: probably, 2: definitely)