Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.0716768134391
Darker point darker score: not computed since the judgement is "E"
darker: E (eq: True, dd: None), confidence: 0, worker: A1BDJFRSELMRDT
darker: 1 (eq: False, dd: True), confidence: 0, worker: A14MXJ8GNYDWX1
darker: 2 (eq: False, dd: False), confidence: 0, worker: A3LNPBZXHKKAA7
darker: 1 (eq: False, dd: True), confidence: 2, worker: AVQ23YRFWZKHH (marked invalid)
darker: E (eq: True, dd: None), confidence: 0, worker: AET2U31SXUAPM
darker: E (eq: True, dd: None), confidence: 0, worker: A2JTDTGLA7IZ0L
(0: guessing, 1: probably, 2: definitely)