Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.0568237906191
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 1, worker: A2C5CT4Y35F75B
darker: 1 (eq: False, dd: True), confidence: 2, worker: A2AAWTFFL0ZXEK (marked invalid)
darker: E (eq: True, dd: None), confidence: 1, worker: A3HPVFAF1U9WXK
darker: E (eq: True, dd: None), confidence: 2, worker: A3LSDO3YPF1SFT
darker: 1 (eq: False, dd: True), confidence: 2, worker: A2YYHNACJ8MFTU
darker: E (eq: True, dd: None), confidence: 2, worker: A32XWNZW2DQ6UZ
(0: guessing, 1: probably, 2: definitely)