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. 2011 May 4;6(5):e18978. doi: 10.1371/journal.pone.0018978

Figure 2. Minimum motion results.

Figure 2

Average green luminance values perceived as equal to red luminance in each location for each observer. Green values varied substantially between observers, and also varied somewhat across the visual field of each observer. Minimum motion trials were conducted on a background equaling the average luminance of the red target. Error bars represent standard error.