There are three main approaches creating stereoscopic S3D content: stereo filming using two cameras, stereo rendering of 3D computer graphics, and 2D to S3D conversion by adding binocular information to 2D material images. Although manual “off-line” conversion can control the amount of parallax flexibly, 2D material images are converted according to monocular information in most cases, and the flexibility of 2D to S3D conversion has not been exploited. If the depth is expressed flexibly, comprehensions and interests from converted S3D contents are anticipated to be differed from those from 2D. Therefore, in this study we created new S3D content for education by applying 2D to S3D conversion. For surgical education, we created S3D surgical operation content under a surgeon using a partial 2D to S3D conversion technique which was expected to concentrate viewers’ attention on significant areas. And for art education, we converted Ukiyoe prints; traditional Japanese artworks made from a woodcut. The conversion of this content, which has little depth information, into S3D, is expected to produce different cognitive processes from those evoked by 2D content, e.g., the excitation of interest, and the understanding of spatial information. In addition, the effects of the representation of these contents were investigated.
2D to stereoscopic 3D (S3D) conversion methods, which is one approach to creating S3D content, are divided into
automatic "on-line" and manual "off-line" methods. Off-line conversion of 2D to S3D is expensive, but offers higher
S3D image quality. Moreover, while off-line conversion provides more flexible control over parallax than stereo filming,
in most cases, 2D images are converted according to the monocular depth cues. The authors propose a new method that
adds uncrossed parallax to entire 2D images and crossed parallax only to specific areas. The authors conducted
subjective and objective evaluations to examine the cognitive characteristics of partial 2D to S3D conversion. This paper
describes the details of the proposed method and the results of the evaluations.