Influence on Depth Perception Caused by Modifying Gradation of Depth Map Images with Gray Level for Computer-Generated Stereogram and Its Subjective Estimation

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There is a lot of information on the internet web site concerning all aspects of stereogram history, science, social organization, and various types of stereograms. A stereogram is a two dimensional flat image viewed in such a fashion as to produce a three dimensional effect, i.e., visual depth perception. A variety of software for generating effectively the random dot stereogram (RDS) and single image stereogram (SIS) has been released on the internet web site. On the other hand, various hidden object images often called depth map image (DMI) with gradation in monochrome must be prepared in advance. This research note focuses on the influence of the depth perception caused be modifying hidden object images for digital stereogram. The possibility of subjective estimation of the depth is discussed using the simultaneous observation of a few stereograms.

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