Control of subjective depth on 3‐D displays by a quantified monocular depth cue

Abstract

This paper considers the architecture and the effectiveness of new algorithms that control the subjective depth on 3-D displays by modulating the contrast of stereoscopic pictures on the basis of a quantified monocular depth cue. First, a psychophysical experiment to quantify the relationship between contrast and subjective depth was conducted. This experimental result shows that the higher the contrast, the nearer the object will be perceived, corresponding to the qualitative relationship. Second, this result was applied to image-processing algorithms that expand or contract the subjective depth of stereoscopic pictures. Subjective assessments to verify the effectiveness of the algorithms were also conducted. The results suggest that the algorithms will allow viewers to experience a highly realistic sensation.

61.1: Control of Subjective Depth in Stereoscopic Motion Pictures by Quantified Aerial Perspective

“…Our conventional algorithm for still pictures consists of the following six steps [1]: luminance calculation, contrast analysis, frequency analysis, depth estimation, modulation-amplitude calculation, and contrast modulation. In the first step, luminance of each input picture was calculated.…”

“…Then, observers viewed the pictures and compared their depth ranges between the nearest and the furthest regions. Finally, they answered a score based on 5-scale evaluation terms [1].…”

“…In our previous study [1], we introduced an image-processing algorithm based on a quantified relationship between contrast and subjective depth, and showed that the algorithm could control the subjective depth of stereoscopic pictures. Although the effectiveness of the algorithm was confirmed, the algorithm was applied only to still pictures and it was unknown whether or not the algorithm was applicable to and effective in motion pictures.…”

Aging and availability of binocular disparity and pictorial depth cues in 3D graphics contents

“…Fujisaki et al . examined individual differences in use of disparity information in currently prevailing 3D graphics environments designed to give observers rich depth perception conveyed by a combination of binocular disparity and monocular pictorial cues . The resulting visual displays used simple 3D graphic stimuli containing shading and binocular disparity.…”

“…Fujisaki et al examined individual differences in use of disparity information in currently prevailing 3D graphics environments 10,11 designed to give observers rich depth perception conveyed by a combination of binocular disparity and monocular pictorial cues. 12 The resulting visual displays used simple 3D graphic stimuli containing shading and binocular disparity. Fujisaki et al demonstrated that 30% of young observers, aged 19-25 years, relied only on information from shading, rather than from disparity, to perceive the depth of the 3D stimuli even when the stimuli contained larger disparities than stimuli the same observers were able to discriminate in a Titmus stereoscopic test.…”