Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.280832749216
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 1, worker: A21AVVEQUEX7DA (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A12DV2RIAQPV5J
darker: 1 (eq: False, dd: True), confidence: 2, worker: A47MKFPE4RROA (marked invalid)
darker: 1 (eq: False, dd: True), confidence: 2, worker: A2CQLD1RK8ZQ7D
darker: E (eq: True, dd: None), confidence: 2, worker: A1TKGFJSMVR2RP
darker: E (eq: True, dd: None), confidence: 2, worker: A1KITOCUU7GERN
darker: 1 (eq: False, dd: True), confidence: 2, worker: A1WRANKL1HRGYW
darker: E (eq: True, dd: None), confidence: 2, worker: A341LHR7178BUY
(0: guessing, 1: probably, 2: definitely)