Vision Science

Vision Science – Why are things seen as we see? –

Vision is much more skillful than we imagine. Visual perception results from “interpretations” of the retinal images. The visual system has many important features including adaptation to visual environments, integration of various visual clues to estimate 3D information, etc. Understanding these functions could bring about remarkable progress to media technology. Although we are almost always subjected to a barrage of different source of visual information, our visual system does not process all the information. Rather, by so-called visual attention, the visual system selectively processes some extent of the input image. To explore the fundamental functions of the vision, we are doing psychophysical experiment, and constructing mathematical models of human vision.

Perception of Material and Surface Quality

In many cases, we can identify the material of objects that we saw only for a moment. Not only the identification of the material, we can also discriminate the condition and quality of objects. To reveal whether the perception of surface qualities or conditions of objects is due to the visual information obtained from eye, we conduct experiments using not only images, such as CG and photographs, but also using real objects. For example, we focus to pearl on our study. To analyze the visual information that experts used to appraise quality of pearl, we investigated the relationship between environment and result of appraisal of the pearl. Furthermore, we are trying to reveal whether there is learning effect of visual skills by comparing experts and non-experts.

Color Vision Research

In our surroundings, there are many things which we can recognize easier using the “color”, such as traffic signals, route map. Color that we see every day is the sense produced by a human visual system – the cerebral system. According to previous studies, the mechanism of color perception (color vision) has been revealed. These results of color vision research have been applied to RGB display, data compression technologies and so on. The elucidation of characteristics of human color vision can contribute to development of new visual display system that corresponds to the characteristics of human color vision.

Crossmodal perception

Humans perceive things by using multiple sensory information and combining them with each other. For example, humans are capable to predict information through only visual information, such as taste, texture, and temperature, which is information they do not actually possess. Depending on the expectation, the experience may feel sweeter or lighter than it actually is. This phenomenon in which perception changes due to the influence of other sensory information in this way is called a crossmodal perception. In this research, we use food images that possess much information such as taste, color, and shape to experiment how humans will make completely unrelated associations such as speed perceptions and naming a set a food sample images, in order to elucidate the human cognitive mechanisms.

Other Research

In our laboratory, other than the study of texture and color perception, various studies on perception are carried out.

Previous Researches

Previous Researches