Perceived depth as a function of relative height under three background conditions.

Perceived depth as a function of relative height under three background conditions.

The hypothesis was proposed, that the perceived depth, which results from the relative height cue, depends on "optical adjacency." A 3 X 3 factorial experiment was conducted to examine this hypothesis. The 2 factors were vertical separation (3.5, 5.5, 7.5 in.) and background conditions (0 background, outline background without surface texture, textured background). Verbal estimates of the depth...

Perception of relative depth interval: systematic biases in perceived depth.

Given an estimate of the binocular disparity between a pair of points and an estimate of the viewing distance, or knowledge of eye position, it should be possible to obtain an estimate of their depth separation. Here we show that, when points are arranged in different vertical geometric configurations across two intervals, many observers find this task difficult. Those who can do the task tend ...

The perceived depth from disparity as function of luminance contrast.

Does human vision show the contrast invariance expected of an ideal stereoscopic system for computing depth from disparity? We used random-dot stereograms to investigate the luminance contrast effect on perceived depth from disparity. The perceived depth of disparity corrugations was measured by adjusting the length of a horizontal line to match the perceived depth of the corrugations at variou...

Size matters: Perceived depth magnitude varies with stimulus height

Both the upper and lower disparity limits for stereopsis vary with the size of the targets. Recently, Tsirlin, Wilcox, and Allison (2012) suggested that perceived depth magnitude from stereopsis might also depend on the vertical extent of a stimulus. To test this hypothesis we compared apparent depth in small discs to depth in long bars with equivalent width and disparity. We used three estimat...

Soil genesis as affected by topography and depth of saline and sodic ground water under semiarid conditions of iran