When Apparent Depth Affects Perceived Lightness Contrast

2000 ◽  
Author(s):  
Frederick Bonato ◽  
Joseph Cataliotti
Keyword(s):  
Apparent Depth ◽  
Lightness Contrast

scholarly journals T-junctions, apparent depth, and perceived lightness contrast

2003 ◽  
Vol 65 (1) ◽  
pp. 20-30 ◽  
Author(s):  
Frederick Bonato ◽  
Joseph Cataliotti ◽  
Melissa Manente ◽  
Karen Delnero
Keyword(s):  
Apparent Depth ◽  
Lightness Contrast

Apparent depth

1977 ◽  
Vol 12 (6) ◽  
pp. 338-338
Author(s):  
J W Warren ◽  
R M Helsdon
Keyword(s):  
Apparent Depth

scholarly journals Separate effects of background and illumination on lightness

Psihologija ◽  
2007 ◽  
Vol 40 (4) ◽  
pp. 543-565
Author(s):  
Suncica Zdravkovic
Keyword(s):  
Illumination Level ◽  
Background Color ◽  
The Third ◽  
Lightness Contrast ◽  
3D Representation

Four experiments attempted to establish an effect of context on lightness. Lightness is one of the dimensions of color and it varies from black to white. Most of our stimuli were inspired by simultaneous lightness contrast illusion. First two experiments contrast the size of an effect produced by the change of background color vs. the change in illumination. The third experiment deals with different type of illusions, where the effect is obtained through the appearance of multiple illumination levels. The last experiment takes into account the ratio of the target and the background. The results reveal the size of effects produced separately by the background color and illumination level and suggest the prime importance of background. Also there are other factors such as reflectance range in the scene, incremental and decremental targets, and 2D vs. 3D representation.

scholarly journals Apparent depth of a patch of dynamic random noise within a static field of random dots

2015 ◽  
Vol 15 (12) ◽  
pp. 832
Author(s):  
Akiko Yasuoka ◽  
Shinichi Kita ◽  
Masahiro Ishii
Keyword(s):  
Random Noise ◽  
Static Field ◽  
Apparent Depth

Geometric Considerations for Stereoscopic Virtual Environments

1993 ◽  
Vol 2 (1) ◽  
pp. 34-43 ◽  
Author(s):  
Larry F. Hodges ◽  
Elizabeth Thorpe Davis
Keyword(s):  
Virtual Environments ◽  
Virtual Environment ◽  
Visual Direction ◽  
Apparent Depth ◽  
Spatial Unit ◽  
Retinal Disparity ◽  
Relationship Of ◽  
The Relationship

We examine the relationship among the different geometries implicit in a stereoscopic virtual environment. In particular, we examine in detail the relationship of retinal disparity, fixation point, binocular visual direction, and screen parallax. We introduce the concept of a volumetric spatial unit called a stereoscopic voxel. Due to the shape of stereoscopic voxels, apparent depth of points in space may be affected by their horizontal placement.

Apparent Depth with Retinal Image Motion of Expansion and Contraction Yoked to Head Movement

Perception ◽  
1998 ◽  
Vol 27 (8) ◽  
pp. 937-949 ◽  
Author(s):  
Takanao Yajima ◽  
Hiroyasu Ujike ◽  
Keiji Uchikawa
Keyword(s):  
Motion Parallax ◽  
Ccd Camera ◽  
Head Movements ◽  
Image Motion ◽  
Apparent Depth ◽  
Motion Cues ◽  
Relative Expansion ◽  
Retinal Image Motion ◽  
Self Motion

The two main questions addressed in this study were (a) what effect does yoking the relative expansion and contraction (EC) of retinal images to forward and backward head movements have on the resultant magnitude and stability of perceived depth, and (b) how does this relative EC image motion interact with the depth cues of motion parallax? Relative EC image motion was produced by moving a small CCD camera toward and away from the stimulus, two random-dot surfaces separated in depth, in synchrony with the observers' forward and backward head movements. Observers viewed the stimuli monocularly, on a helmet-mounted display, while moving their heads at various velocities, including zero velocity. The results showed that (a) the magnitude of perceived depth was smaller with smaller head velocities (<10 cm s−1), including the zero-head-velocity condition, than with a larger velocity (10 cm s−1), and (b) perceived depth, when motion parallax and the EC image motion cues were simultaneously presented, is equal to the greater of the two possible perceived depths produced from either of these two cues alone. The results suggested the role of nonvisual information of self-motion on perceiving depth.

The Rediscovery of the Inner Life: From Spinoza to Kant

2005 ◽  
pp. 273-298
Keyword(s):  
Eighteenth Century ◽  
Great Part ◽  
Human Experience ◽  
Spiritual Experience ◽  
Apparent Depth ◽  
Pure Reason ◽  
Critique Of Pure Reason ◽  
Inner Life ◽  
Philosophical Work ◽  
Historical Tradition

This chapter considers stages of growing intelligence, and even of growing spiritual knowledge, marked by an inevitable and lamentable decline in apparent depth and vitality of spiritual experience. In such stages, the greatest concerns of our lives are somehow for a while hidden, even forgotten. We become more knowing, more clever, more critical, more wary, more skeptical, but we seemingly do not grow more profound or more reverent. Such a stage in human experience is represented, in great part, by the philosophical thinkers who flourished between the time of Spinoza's death, in 1677 and the appearance of Kant's chief philosophical work, “The Critique of Pure Reason” in 1781. It is the period which has been especially associated, in historical tradition, with the eighteenth century.

The Role of Figure Orientation and Apparent Depth in the Perception of the Horizontal—Vertical Illusion

Perception ◽  
1975 ◽  
Vol 4 (1) ◽  
pp. 79-83 ◽  
Author(s):  
Harvey R Schiffman ◽  
Jack G Thompson
Keyword(s):  
Stimulus Figure ◽  
Vertical Line ◽  
Apparent Depth ◽  
Horizontal Line ◽  
Size Constancy ◽  
Illusory Effect

An experiment was performed which examined the role of figural orientation directly, and the role of an inappropriately invoked size-constancy mechanism indirectly, in the actuation and magnitude of the horizontal—vertical illusion. When the vertical line of the stimulus figure was aligned above the horizontal line, the illusory effect was significant and positive; in contrast, when the vertical line was located below the horizontal line, the illusion was negative. Under the assumption that a vertical line can appear as a foreshortened line in depth, these findings support an explanation based on the operation of a misapplied size-constancy mechanism.

Sign in / Sign up

Export Citation Format

Share Document