<title>Interactive stereoscopy optimization for head-mounted displays</title>

Abstract

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The effect of out-of-focus blur on visual discomfort when using stereo displays

“…These methods either involve a static or dynamic change in the separation of the virtual cameras or some sort of image or view scaling to reduce the amount of disparity. For most AR applications these methods are not well suited, because they either change the camera separation which will lead to a wrong perception of depth, or they change the FOV which is known to have negative effects on stereo vision [12]. Using another FOV as the one of the HMD would also lead to a magnification or demagnification of the image, which is usually not desired in AR.…”

“…So the vergence-accommodation conflict which is considered to be a major source of visual discomfort has been studied extensively [16]. Min and Jense [12] studied the effect of angle and distance between the cameras and the FOV of cameras. Livingston et al [9] investigated the influence of contrast and disparity on the accuracy of stereo perception.…”

A user study towards understanding stereo perception in head-worn augmented reality displays

“…Incorrect IPD distorts distance perception; if the IPD is set at the population mean (65 mm), an observer with a larger IPD would perceive the object as farther away than it is; an observer with smaller IPD would perceive it closer [8]. Similarly, errors in the judged depth of nearby virtual objects have been measured as a function of changes in binocular vergence [3], with errors varying between subjects.…”

Using texture maps to correct for optical distortion in head-mounted displays

“…Because the edges of the HMD raster itself are distorted, using all of the available display space would require clipping to a curved graphics window. A slight misregistration is introduced into stereo pairs [11]. Also, since distortion changes the perceived shape and size of raster pixels, distortion can introduce a perceived blur, and complicate antialiasing.…”