A method of quantization digital holograms with which more effective reconstructions can be able to get, is presented. The method is based on an iterative quantization method which has iteration steps for correcting errors by quantization. It is possible to get better reconstructions than a conventional method because of simplified algorithm. The production of holograms using the proposed method is described. As a result, thier simulated and optical reconstruntions are presented.
Sign language has several characteristics. We have developed a sign language display system by using these characteristics. For example, it is more important to express movement of hands than express detail. In this paper, we discuss the method of synthesizing at high speed, and layer of data processing.
In a highly developed information society, personal identification for security measures has been highly demanded in a wide variety of usage. Authors propose to use auricles for personal identification using human body characterisctics in the next genaration. In this paper, we describe the following examinations to analyze individuality in auricle images. (1)Recognition using regional feature extarcted by block division. (2)Recognition using linear feature based on the medical classificaiton. We also describe a analysis and consideration of experiment results.
We assesed the sharpness of edge in three dimensional(3D) geometrical images comparing with that in two dimensional(2D) images. We found no difference between subjective evaluation value for 3D edge sharpness with local rivalry and that for 2D edge. This result suggests that the interocular suppression is responsible for the evaluation. Other results of forced choice experiments also showed the effects of the suppression, which were consistent with the suggestion.
This paper discusses geometrical distortions (i.e., errors) found in a reconstructed two-dimensional (2D) image from three-dimensional (3D) space by human observers with stereopsis. Psychological experiments employing stimuli of 2D- and 3D- Poggendorff illusion show that the difference in effect between the two conditions agrees well with an estimation calculated from the errors mentioned above. It is therefore suggested that the phenomenon that causes Poggendorff illusion works as an error compensator when the observer views lines with occlusion in a normal 3D space. Key-words: Poggendorff illusion. Stereopsis, Binocular vision, Amodal completion, Perception. Human vision.
The present study analyzed the effects of temporal parameters of stimulus on motion assimilation for sinusoidal gratings. The motion assimilation occurred when both the test and the inducing gratings were displaced abruptly in a two-frame motion display, but not when either or both of them were drifted continuously. The magnitude of motion assimilation was eliminated for the near-stationary test grating, and the magnitude became reduced for the inducing grating presented in a four-frame display. These results were discussed by taking into account of the spatiotemporal frequency components of the stimuli and temporal integration of motion signals.
The image generation technology using digital image processing and computer graphics has been improved so rapid that many movies and commercial films are generated using these technology these days. In my lecture. I will intoroduce the latest digital image technology used current movies released in 1994 in America and Japan. Further. I will introduce Motion Capturing system which is become very famous at SIGGRAPH' 94.