Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: E
Darker method: C
Equal score: 0.24310596858
Darker point darker score: not computed since the judgement is "E"
darker: 2 (eq: False, dd: True), confidence: 1, worker: A1KF93C9NTOP42
darker: E (eq: True, dd: None), confidence: 0, worker: A2OF0GTKWKM2T5
darker: E (eq: True, dd: None), confidence: 2, worker: AGO9QN7UEDUYL
darker: E (eq: True, dd: None), confidence: 2, worker: A1IOJ2LGMGISYM
darker: 2 (eq: False, dd: True), confidence: 2, worker: ATWGPR2A3M7WU (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A2K9VAUQ9I7CLT
(0: guessing, 1: probably, 2: definitely)