Acquisition Method of Texture Information of Metallic Topcoats for a Video Camera

Abstract

When we see photographic images of metallic topcoats, we often perceive that the impression of them is different from those of real objects. It probably seems that the phenomenon is caused by saturation of image signals resulting from lacks of the dynamic range. This is essential for high fidelity video cameras. The objective of the research is to make clear a way of acquisition of texture information of metallic topcoats. For our first approach, we tried to analyze depth feeling for metallic topcoats. In order not to saturate image signals of flake pigments in the coating, high dynamic range images were made. We subjectively evaluated the appearance of flake pigments in the images by comparing with that of real objects of metallic topcoats. As the result, the appearance of flake pigments in the images become close to that of real objects when colors of images were almost equal to them and luminance of the flakes are proportional to their sizes with higher ratio.