Conference paper

Appeared in: 12. Workshop Farbbildverarbeitung

Publication year: 2006

Pages: 14-22

URL: http://germancolorgroup.de/html/Vortr_06_pdf/02_Hansen_coledge.pdf

Conference: 12. Workshop Farbbildverarbeitung

Abstract: 

Spatial resolution for color is poor, and reports that V1 simple cell respond to oriented achromatic stimuli have led to the view of two independent processing streams, a high-resolution achromatic form system and a low-resolution unoriented color surface system. Recent data have challenged this view, showing that V1 simple cells respond also to oriented chromatic stimuli [5, 7] and that color is processed both in the dorsal and ventral stream [2]. Here we analyze the statistical distribution of luminance and chromatic edges in natural scenes. We show that few edges are characterized exclusively by luminance or chromatic information alone. Instead, the vast majority of edges combine luminance and chromatic information, supporting recent physiological findings of the joint processing of chromatic and luminance information. While few edge are characterized by a pure chromatic contrast, these edge are important for particular ecologically relevant tasks such as the detection of ripe fruit against foliage. Overall, we suggest that chromatic information makes edge detection more robust and provides important additional information for the proper segmentation of objects.

Harvard Citation style: Hansen, T. and Gegenfurtner, K. (2006) Co-occurrence of color and luminance edges in natural scenes, in 12. Workshop Farbbildverarbeitung. Ilmenau : Zentrum für Bild- und Signalverarbeitung. pp. 14-22. http://germancolorgroup.de/html/Vortr_06_pdf/02_Hansen_coledge.pdf

APA Citation style: Hansen, T., & Gegenfurtner, K. (2006). Co-occurrence of color and luminance edges in natural scenes. In 12. Workshop Farbbildverarbeitung. (pp. 14-22). Zentrum für Bild- und Signalverarbeitung. http://germancolorgroup.de/html/Vortr_06_pdf/02_Hansen_coledge.pdf