Subjective contrast sensitivity function assessment in stereoscopic viewing of Gabor patches

While 3D displays are entering hospitals, no study to-date has explored the impact of binocular disparity and 3D inclination on contrast sensitivity function (CSF) of humans. However, knowledge of the CSF is crucial to properly calibrate medical, especially diagnostic, displays. This study examined the impact of two parameters on the CSF: (1) the depth plane position (0 mm or 171 mm behind the display plane, respectively DP:0 or DP:171), and (2) the 3D inclination (0° or 45° around the horizontal axis of the considered DP), each of these for seven spatial frequencies ranging from 0.4 to 10 cycles per degree (cpd). The stimuli were computer-generated stereoscopic images of a vertically oriented 2D Gabor patch with a given frequency. They were displayed on a 24” full HD stereoscopic display using a patterned retarder. Nine human observers assessed the CSF in a 3-down 1-up staircase experiment. Medians of the measured contrast sensitivities and results of Friedman tests suggest that the 2D CSF as modeled by Barten1 still holds when a 3D display is used as a 2D visualization system (DP:0). However, the 3D CSF measured at DP:171 was found different from the 2D CSF at frequencies below 1 cpd and above 10 cpd.

[1]  Tom Kimpe,et al.  15.3: Specificities of a Psycho‐Physical Test Room Dedicated for Medical Display Applications , 2007 .

[2]  T. Cornsweet,et al.  The staircrase-method in psychophysics. , 1962, The American journal of psychology.

[3]  H. J. Arnold.  Introduction to the Practice of Statistics , 1990 .

[4]  Peter G. J. Barten,et al.  Formula for the contrast sensitivity of the human eye , 2003, IS&T/SPIE Electronic Imaging.

[5]  Clifton M. Schor,et al.  Is edge information for stereoacuity spatially channeled? , 1989, Vision Research.

[6]  M. A. Bouman,et al.  Spatial Modulation Transfer in the Human Eye , 1967 .

[7]  Carl J. D'Orsi,et al.  Stereoscopic Digital Mammography: Improved Accuracy of Lesion Detection in Breast Cancer Screening , 2008, Digital Mammography / IWDM.

[8]  M. Friedman.  The Use of Ranks to Avoid the Assumption of Normality Implicit in the Analysis of Variance , 1937 .

[9]  M. García-Pérez,et al.  Forced-choice staircases with fixed step sizes: asymptotic and small-sample properties , 1998, Vision Research.

[10]  J. Mayhew,et al.  Contrast Sensitivity Function for Stereopsis , 1978, Perception.

[11]  E. M. Lowry,et al.  Sine-Wave Response of the Visual System. II. Sine-Wave and Square-Wave Contrast Sensitivity*† , 1962 .

[12]  L. Cormack,et al.  Interocular correlation, luminance contrast and cyclopean processing , 1991, Vision Research.

[13]  J. Robson,et al.  Application of fourier analysis to the visibility of gratings , 1968, The Journal of physiology.

[14]  D. G. Green,et al.  Monocular versus Binocular Visual Acuity , 1965, Nature.

[15]  O. Schade.  Optical and photoelectric analog of the eye. , 1956, Journal of the Optical Society of America.

[16]  Gordon E. Legge,et al.  Stereopsis and contrast , 1989, Vision Research.

[17]  J. Robson.  Spatial and Temporal Contrast-Sensitivity Functions of the Visual System , 1966 .

[18]  Jyrki Rovamo,et al.  Modelling the dependence of contrast sensitivity on grating area and spatial frequency , 1993, Vision Research.

[19]  J. J. Vos,et al.  Resolution and contrast sensitivity at low luminances. , 1972, Vision research.

[20]  Robert M. Nishikawa,et al.  Stereoscopic digital mammography: improved specificity and reduced rate of recall in a prospective clinical trial. , 2013, Radiology.

[21]  R. Blake,et al.  How Contrast Affects Stereoacuity , 1988, Perception.

[22]  Peter G. J. Barten,et al.  Contrast sensitivity of the human eye and its e ects on image quality , 1999 .

[23]  J. Weir.  Quantifying test-retest reliability using the intraclass correlation coefficient and the SEM. , 2005, Journal of strength and conditioning research.

[24]  K N OGLE,et al.  Stereoscopic vision and the duration of the stimulus. , 1958, A.M.A. archives of ophthalmology.