Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: 2
Darker method: C
Equal score: -0.126943855776
Darker point darker score: -1.02465170297
darker: 2 (eq: False, dd: False), confidence: 1, worker: AW0K78T4I2T72
darker: 1 (eq: False, dd: True), confidence: 0, worker: A1JWOUVUL09Y8D (marked invalid)
darker: 2 (eq: False, dd: False), confidence: 1, worker: A21VLTGNNJH43I
darker: E (eq: True, dd: None), confidence: 2, worker: A2DNSD743W4OC2
darker: E (eq: True, dd: None), confidence: 0, worker: A2KGL2FXIG2IQM (marked invalid)
darker: 2 (eq: False, dd: False), confidence: 1, worker: A1EY3KWGUA9A1N
darker: E (eq: True, dd: None), confidence: 2, worker: A1IOJ2LGMGISYM
darker: 1 (eq: False, dd: True), confidence: 2, worker: A2Q5IX1YGGLQML (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: A3Q9S2K93W2KDI (marked invalid)
(0: guessing, 1: probably, 2: definitely)