In the last 80 years, the role of spatial processing in the visual system has been analyzed and demonstrated from many studies and experiments. Starting from the first studies of Young, Helmholtz and Hering, color vision models have developed, and several biological and physiological research paper proved the importance of spatial processing in color vision. In this paper, we present some of the studies which have explored the role of spatial processing to study color vision deficiency. Main scope of this work is to increase the awareness of the scientific community on the importance to include spatial processing not only in color vision models, but also in developing color deficiency aids and tests.
Color enables humans to readily extract features of an object, leading us to describe tomatoes and apples as “red” despite the presence of other colors. How observers accomplish this is not well understood. In this study, we present observers with rapidly presented stimuli at varying levels of context. Observers were asked to select the color that best represents the image from eight options. We found that observers tended to select progressively lighter or darker colors as more context was introduced, although whether the representative color choice became darker or lighter varied from image to image. This is likely a result of observers discounting achromatic cues (i.e.: specular highlights, shadows) as context is revealed, but why images were treated inconsistently requires further investigation. Observer responses were noisily distributed. These results shed light on how observers characterize the color of multicolored objects.
Red does not stand out brightly to dichromatic individuals with a different sense of color from the majority. However, they know that the color of passion is red. In this paper, we investigate the red appearance and color sensitivity of people with different types of color blindness: “Protan and Deutan.”