Cross adaptation effect between luminance, red/green, and blue/yellow. --> Common motion ... Color Contrast: max red & max green. Power Macintosh G4.
right eye
luminance motion
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Duration (s)
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1.Yes, integration of color and motion precedes IOVD calculation. 2.Motion in depth can be seen in isoluminant color stimuli. 3.Color and luminance motion systems share the same monocular mechanisms. 4.This supports the existence of the first order color motion system. (It is unlikely that the present results can be explained by tracking mechanism for color motion)
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Conclusions
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RG Adapt
3D
2D
YB Adapt
3D
2D
3D
Details of Exp. 3 Spatial frequency: 1.0 c/deg 10° x 11° (= 140 x 154 pixels) 1° gap Viewed from 37 cm Average luminance: 14 cd/m2 Equating by minimizing flicker CIE xy: R (0.62, 0.34), G (0.29, 0.60) B (0.15, 0.07), Y (0.41, 0.51) Luminance Contrast: 100% Color Contrast: max red/max green VSG2/5 Sony GDM-F520 21inch CRT:
800 x 600 pixels, 100Hz 4 trials per condition
Temporal frequency (Hz) Cross adaptation effect between luminance, red/green, and blue/yellow --> Common motion mechanism for two opponent color and luminance systems.
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left eye
color motion
2D
0
luminance motion
Test
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color motion
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.F 10
L-L RG-L YB-L L-RG RG-RG YB-RG L-YB RG-YB YB-YB
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To investigate three questions. 1. Color to motion in depth? 2. Color and luminance share motion process? 3. The common process proceeds IOVD?
monocular motion
Lum Adapt
Combination of three stimuli
perception of motion in depth
monocular motion
Purpose
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Same effect for yellow/blue?
inter-ocular velocity difference detector
C-CL
Yellow/blue
Q: Does integration of color and luminance Motion-in-depth precede IOVD ?
２DMAE: Spatial frequency selectivity ３D (Motion in depth) MAE: No spatial frequency selectivity -> IOVD calculation after integrating SF channel outputs (Shioiri et al. JoV, 2009)
Little effect of orientation differences
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4
CCL
F1 00
1 Test Spatial Frequency [cpd]
CLC
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0.4
5 Hz
CC
3D
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4
ft le
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Frequency integrated Motion(Left eye)
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Frequency integrated Motion(Right eye)
Left eye
1 Test Spatial Frequency [cpd]
C-LC
Duration (s)
0.4
No spatial frequency selective
LCL
Temporal frequency (Hz)
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4
0
Same orientation
LLC
3D
2D
yr
1 Test Spatial Frequency [cpd]
L-CL
Experiment 3
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0
0.4
Adapted eye cross
Different orientation
LL
Exp 3: Red/Green and Yellow/Blue
L-LC
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Right eye
Spatial frequency selective
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2 0
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C-L
2D
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8 6 4
1
8
5Hz 2D 5Hz 3D 1Hz 2D 1Hz 3D
Data were partially reported in Shioiri S, Nakajima T, and Yaguchi H. 2004 Internal Commission for Optics ‘04.
Cross adaptation effect for 2D and 3D MAEs --> Common monocular motion mechanism for color and luminance.
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2
Adaptation
Power Macintosh G4 Sony CPD-G500J 21inch CRT:
Exp 2: Adapted and Unadapted eye
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10
3
AT
3D
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MAE duration [sec]
5Hz 2D 5Hz 3D 1Hz 2D 1Hz 3D
Details of Exps. 1 & 2 Spatial frequency: 1.25 or 0.42 c/deg 10° x 10° (= 300 x 300 pixels) 0.5° gap Viewed from 82 cm Average luminance: 30cd/m 2 Equating by minimizing motion impression CIE xy: R (0.60, 0.33), G (0.28, 0.60) Luminance Contrast: 100% Color Contrast: max red & max green
20 trials per condition Temporal frequency (Hz) Coross adaptation effect for 2D and 3D MAEs --> Common monocular motion mechanism for color and luminance.
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Adaptation
L-C
Adapted eye cross
Experiment 2 Specific cross adaptation for adapted eye?
3D motion is seen after monocular motion adaptation
Conditions
Luminance adaptation
1028 x 768 pixels, 120Hz
Perceived motion
Adaptation: monocular vertical grating 20s, no hint of which eye is adapted Test: stationary oppositely orientated gratings until response Response: MAE duration and direction
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MAE
6
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Po Adaptation stimulus
IOVD detector can be investigated by monocular motion adaptation
Adaptation: monocular 10deg (right eye)
Motion of upper half
Adapting left eye
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Two mechanisms for two cues for motion in depth Motion cue: Interocular velocity differences VL - VR - IOVD detector Disparity cue: Changing disparity over time dδ/dt - CDOT detector
Brooks & Mather (2000) Cumming & Parker (1994) Harris et al (2008). Nefs & Harris (2010). Regan (1993). Rokers et al (2009). Shioiri et al. (2000)
Motion of lower half
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Left eye Right eye
Motion of lower half
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VR
Motion of upper half
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VR
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ht p
VL
3D
2D
z
Adapting right eye
Velocity mechanism
δ
Right eye
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VL
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Disparity mechanism
δ(t)
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dδ/dt
Disparity：δ(t)
Exp 1: Color and Luminance cross adaptation
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Perceiving motion in depth
Fixation point
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Two cues for motion-in-depth perception
Left eye
Method
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Research Institute of Electrical Communication, Tohoku University
Interocular velocity difference for motion in depth
Object moving forward
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Satoshi Shioiri, Kazumichi Matsumiya and Mitsuharu Ogiya
