A Study of Visual Comfort for Disparity Gradient of S3D Image with Multiple Salient Objects

This paper had investigated the perception of visual comfort for the disparity gradient of stereoscopic 3D(S3D) image though subjective evaluation experiments. For the extraction of gradient features, the calculation of absolute disparity and relative disparity were all considered. The experiment result shown that the relative disparity gradient mainly affects the visual comfort under the circumstance of positive disparity, while the absolute disparity gradient would affect the viewing experience with negative disparity. As a whole, the higher both the disparity gradient was, the lower the rating score was. The research achievement is of practical value, which can not only provide importance experimental support for the visual perception mechanism, but also offer the valid basis for feature extraction of stereoscopic images.