Abstract
Along the l axis, color filling-in percepts depend on the spatial arrangement of the l chromaticity (Zhuang and Cao, VSS 2012). This study examined the role of spatial arrangement along s axis and the interaction of the two cardinal axes in color filling-in process. A rectangular outer field (O) and an annulus (A) surrounded a circular inner field (I). The inner/outer fields had varied s chromaticities (s = 0.6, 1.0 or 1.6) and a fixed l chromaticity (l =0.665). The annulus differed from the inner/outer fields in: (1) only s chromaticity or (2) both s and l chromaticities. Observers reported their percepts continuously during a 25-second steady-fixation-viewing period for each trial. When there was no l difference between the annulus and the other two fields, a monotonic arrangement in s chromaticity (I>A>O or O>A>I) increased the likelihood of the annulus being filled in with the inner- or outer-field color (80% of the monotonic vs. 39% of the non-monotonic trials), while decreased the likelihood of the annulus color spreading into the neighboring fields (monotonic 14% vs. non-monotonic 36%). In contrast, when there was an l difference between the annulus and the neighboring fields, color spreading from the annulus to the inner field was the most frequent percept regardless of spatial arrangement of the s chromaticity (monotonic 20% vs. non-monotonic 24%). Finally, the monotonic arrangement in s chromaticity with or without an l difference reduced time-to-filled-in and increased filling-in percept duration. These results indicate that color filling-in along the s axis depends on the spatial arrangement of the s chromaticity and the presence or absence of an l difference, suggesting that the two cardinal axes do not act independently in color filling-in process.
Meeting abstract presented at VSS 2013