stimupy.papers.RHS2007

Stimuli from Robinson, Hammon & de Sa (2007) https://doi.org/10.1016/j.visres.2007.02.017

This module reproduces all of the stimuli used by Robinson, Hammon & de Sa (2007) as they were provided to the model described in that paper.

Each stimulus is provided by a separate function, a full list can be found as stimupy.papers.RHS2007.__all__

The output of each of these functions is a stimulus dictionary.

For a visual representation of all the stimuli and their mask, simply run this module as a script:

$ python stimuli/papers/RHS2007.py

__all__(list of str)

that are exported by this module when executing

>>> from stimupy.papers.RHS2007 import *

Type:

list of all stimulus-functions

References

Robinson, A. E., Hammon, P. S., & de Sa, V. R. (2007).

Explaining brightness illusions using spatial filtering and local response normalization. Vision Research, 47(12), 1631-1644. https://doi.org/10.1016/j.visres.2007.02.017

Functions

WE_thick	White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1a.
WE_thin_wide	White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1b.
WE_dual	Dual White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1c.
WE_anderson	Anderson variation of White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1d.
WE_howe	Howe variation of White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1e.
WE_zigzag	Wedding cake stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1f.
WE_radial_thick_small	Radial White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1g.
WE_radial_thick	Radial White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1h.
WE_radial_thin_small	Radial White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1i.
WE_radial_thin	Radial White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1j.
WE_circular1	Ring (or circular White) stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1k.
WE_circular05	Ring (or circular White) stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1l.
WE_circular025	Ring (or circular White) stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1m.
grating_induction	Grating induction as shown in Robinson, Hammon, & de Sa (2007) Fig 1n.
sbc_large	Simultaneous brightness contrast as shown in Robinson, Hammon, & de Sa (2007) Fig 1o.
sbc_small	Simultaneous brightness contrast as shown in Robinson, Hammon, & de Sa (2007) Fig 1p.
todorovic_equal	Todorovic stimulus - equal as shown in Robinson, Hammon, & de Sa (2007) Fig 1q.
todorovic_in_large	Todorovic stimulus - in as shown in Robinson, Hammon, & de Sa (2007) Fig 1r.
todorovic_in_small	Todorovic stimulus - in as shown in Robinson, Hammon, & de Sa (2007) Fig 1s.
todorovic_out	Todorovic stimulus - out as shown in Robinson, Hammon, & de Sa (2007) Fig 1t.
checkerboard_016	Checkerboard stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1u.
checkerboard_094	Checkerboard stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1v.
checkerboard_21	Checkerboard stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1w.
corrugated_mondrian	Corrugated Mondrians as shown in Robinson, Hammon, & de Sa (2007) Fig 1x.
benary_cross	Benarys cross as shown in Robinson, Hammon, & de Sa (2007) Fig 1y.
todorovic_benary1_2	Todorovic variation of Benarys cross as shown in Robinson, Hammon, & de Sa (2007) Fig 1z.
todorovic_benary3_4	Todorovic variation of Benarys cross as shown in Robinson, Hammon, & de Sa (2007) Fig 1z.
todorovic_benary1_2_3_4	Todorovic variation of Benarys cross as shown in Robinson, Hammon, & de Sa (2007) Fig 1z.
bullseye_thin	Bullseye stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1aa.
bullseye_thick	Bullseye stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1bb.

WE_thick(ppd=32, pad=True)

White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1a. Grating size: 12x16 deg Grating frequency: 0.25 cpd Target size: 4x2 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (1999).

A multiscale spatial filtering account of the White effect, simultaneous brightness contrast and grating induction. Vision Research, 39, 4361-4377.

White, M. (1979).

A new effect of pattern on perceived lightness. Perception, 8, 413-416.

WE_thin_wide(ppd=32, pad=True)

White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1b. Grating size: 12x16 deg Grating frequency: 0.5 cpd Target size: 2x1 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (1999).

A multiscale spatial filtering account of the White effect, simultaneous brightness contrast and grating induction. Vision Research, 39, 4361-4377.

White, M. (1979).

A new effect of pattern on perceived lightness. Perception, 8, 413-416.

WE_dual(ppd=32, pad=True)

Dual White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1c. Grating sizes: 6x8 deg Grating frequency: 0.5 cpd Target size: 2x1 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

WE_anderson(ppd=32, pad=True)

Anderson variation of White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1d. Grating size: 16x16 deg Grating frequency: 0.5 cpd Target size: 3.2x1 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Anderson, B. L. (2001).

Contrasting theories of White’s illusion. Perception, 30, 1499-1501

Blakeslee, B., Pasieka, W., & McCourt, M. E. (2005).

Oriented multiscale spatial filtering and contrast normalization: a parsimonious model of brightness induction in a continuum of stimuli including White, Howe and simultaneous brightness contrast. Vision Research, 45, 607-615.

WE_howe(ppd=32, pad=True)

Howe variation of White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1e. Grating size: 16x16 deg Grating frequency: 0.5 cpd Target size: 3.2x1 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., Pasieka, W., & McCourt, M. E. (2005).

Oriented multiscale spatial filtering and contrast normalization: a parsimonious model of brightness induction in a continuum of stimuli including White, Howe and simultaneous brightness contrast. Vision Research, 45, 607-615.

Howe, P. D. L. (2001).

A comment on the Anderson (1997), the Todorovic (1997), and the Ross and Pessoa (2000) explanations of White’s effect. Perception, 30, 1023-1026

WE_zigzag(ppd=32, pad=True)

Wedding cake stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1f.

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Clifford, C. W. G., & Spehar, B. (2003).

Using colour to disambiguate contrast and assimilation in White’s effect. Journal of Vision, 3, 294a. https://doi.org/10.1167/3.9.294

WE_radial_thick_small(ppd=32, pad=True)

Radial White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1g. Circle size: 16x16 deg Number of segments: 14 Target length: 4 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Anstis, S. (2003).

White’s effect in brightness & color. Online Demonstration

WE_radial_thick(ppd=32, pad=True)

Radial White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1h. Circle size: 24x24 deg Number of segments: 18 Target length: 4 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Anstis, S. (2003).

White’s effect in brightness & color. Online Demonstration

WE_radial_thin_small(ppd=32, pad=True)

Radial White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1i. Circle size: 16x16 deg Number of segments: 26 Target length: 2 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Anstis, S. (2003).

White’s effect in brightness & color. Online Demonstration

WE_radial_thin(ppd=32, pad=True)

Radial White stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1j. Circle size: 24x24 deg Number of segments: 42 Target length: 2 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Anstis, S. (2003).

White’s effect in brightness & color. Online Demonstration

WE_circular1(ppd=32, pad=True)

Ring (or circular White) stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1k. Circle size: 16x16 deg Ring frequency: 0.5 cpd Ring width: 1 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Howe, P. D. L. (2005).

White’s effect: removing the junctions but preserving the strength of the illusion. Perception, 34, 557-564.

WE_circular05(ppd=32, pad=True)

Ring (or circular White) stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1l. Circle size: 16x16 deg Ring frequency: 1 cpd Ring width: 0.5 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Howe, P. D. L. (2005).

White’s effect: removing the junctions but preserving the strength of the illusion. Perception, 34, 557-564.

WE_circular025(ppd=32, pad=True)

Ring (or circular White) stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1m. Circle size: 16x16 deg Ring frequency: 2 cpd Ring width: 0.25 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Howe, P. D. L. (2005).

White’s effect: removing the junctions but preserving the strength of the illusion. Perception, 34, 557-564.

grating_induction(ppd=32, pad=True)

Grating induction as shown in Robinson, Hammon, & de Sa (2007) Fig 1n. Circle size: 12x16 deg Grating frequency: 0.25 cpd Target size: 1x16 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (1999).

A multiscale spatial filtering account of the White effect, simultaneous brightness contrast and grating induction. Vision Research, 39, 4361-4377.

McCourt, M. E. (1982).

A spatial frequency dependent grating-induction effect. Vision Research, 22, 119-134. https://doi.org/10.1016/0042-6989(82)90173-0

sbc_large(ppd=32, pad=True)

Simultaneous brightness contrast as shown in Robinson, Hammon, & de Sa (2007) Fig 1o. Stimulus size: 13x31 deg Target sizes: 3x3 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (1999).

A multiscale spatial filtering account of the White effect, simultaneous brightness contrast and grating induction. Vision Research, 39, 4361-4377.

sbc_small(ppd=32, pad=True)

Simultaneous brightness contrast as shown in Robinson, Hammon, & de Sa (2007) Fig 1p. Stimulus size: 13x31 deg Target sizes: 1x1 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (1999).

A multiscale spatial filtering account of the White effect, simultaneous brightness contrast and grating induction. Vision Research, 39, 4361-4377.

todorovic_equal(ppd=32, pad=True)

Todorovic stimulus - equal as shown in Robinson, Hammon, & de Sa (2007) Fig 1q. Stimulus size: 13x31 deg Target size: 8x8 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (1999).

A multiscale spatial filtering account of the White effect, simultaneous brightness contrast and grating induction. Vision Research, 39, 4361-4377.

Pessoa, L., Baratoff, G., Neumann, H., & Todorovic, D. (1998).

Lightness and junctions: variations on White’s display. Investigative Ophthalmology and Visual Science (Supplement), 39, S159.

todorovic_in_large(ppd=32, pad=True)

Todorovic stimulus - in as shown in Robinson, Hammon, & de Sa (2007) Fig 1r. Stimulus size: 13x31 deg Target size: 5.3x5.3 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (1999).

A multiscale spatial filtering account of the White effect, simultaneous brightness contrast and grating induction. Vision Research, 39, 4361-4377.

Todorovic, D. (1997).

Lightness and junctions. Perception, 26, 379-395.

todorovic_in_small(ppd=32, pad=True)

Todorovic stimulus - in as shown in Robinson, Hammon, & de Sa (2007) Fig 1s. Stimulus size: 13x31 deg Target size: 3x3 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (1999).

A multiscale spatial filtering account of the White effect, simultaneous brightness contrast and grating induction. Vision Research, 39, 4361-4377.

Todorovic, D. (1997).

Lightness and junctions. Perception, 26, 379-395.

todorovic_out(ppd=32, pad=True)

Todorovic stimulus - out as shown in Robinson, Hammon, & de Sa (2007) Fig 1t. Stimulus size: 13x31 deg Target size: 9.4x9.4 deg

(note: in RHS2007, it says 8.7x8.7 deg, however that does not match with Fig 1t)

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (1999).

A multiscale spatial filtering account of the White effect, simultaneous brightness contrast and grating induction. Vision Research, 39, 4361-4377.

Pessoa, L., Baratoff, G., Neumann, H., & Todorovic, D. (1998).

Lightness and junctions: variations on White’s display. Investigative Ophthalmology and Visual Science (Supplement), 39, S159.

checkerboard_016(ppd=32, pad=True)

Checkerboard stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1u. Stimulus size: 6.25x15.9375 deg Target size: 0.156x0.156 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (2004).

A unified theory of brightness contrast and assimilation incorporating oriented multi-scale spatial filtering and contrast normalization. Vision Research, 44, 2483-2503.

DeValois, R. L., & DeValois, K. K. (1988).

Spatial vision. New York: Oxford University Press.

checkerboard_094(ppd=32, pad=True)

Checkerboard stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1v. Stimulus size: 6.5625x23.4375 deg Target size: 0.938x0.938 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (2004).

A unified theory of brightness contrast and assimilation incorporating oriented multi-scale spatial filtering and contrast normalization. Vision Research, 44, 2483-2503.

DeValois, R. L., & DeValois, K. K. (1988).

Spatial vision. New York: Oxford University Press.

checkerboard_21(ppd=32, pad=True)

Checkerboard stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1w. Stimulus size: 6.28125x20.9375 deg Target size: 2.09x2.09 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (2004).

A unified theory of brightness contrast and assimilation incorporating oriented multi-scale spatial filtering and contrast normalization. Vision Research, 44, 2483-2503.

DeValois, R. L., & DeValois, K. K. (1988).

Spatial vision. New York: Oxford University Press.

corrugated_mondrian(ppd=32, pad=True)

Corrugated Mondrians as shown in Robinson, Hammon, & de Sa (2007) Fig 1x.

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (2001).

A multiscale spatial filtering account of the Wertheimer-Benary effect and the corrugated Mondrian. Vision Research, 41, 2487-2502.

Adelson, E. H. (1993).

Perceptual organization and the judgment of brightness. Science, 262, 2042-2044. https://doi.org/10.1126/science.8266102

benary_cross(ppd=32, pad=True)

Benarys cross as shown in Robinson, Hammon, & de Sa (2007) Fig 1y.

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (2001).

A multiscale spatial filtering account of the Wertheimer-Benary effect and the corrugated Mondrian. Vision Research, 41, 2487-2502.

Benary, W. (1924).

Beobachtungen zu einem Experiment über Helligkeitskontrast. Psychologische Forschung, 5, 131-142. https://doi.org/10.1007/BF00402398

todorovic_benary1_2(ppd=32, pad=True)

Todorovic variation of Benarys cross as shown in Robinson, Hammon, & de Sa (2007) Fig 1z. Only contains the first two targets (1-2).

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (2001).

A multiscale spatial filtering account of the Wertheimer-Benary effect and the corrugated Mondrian. Vision Research, 41, 2487-2502.

Todorovic, D. (1997).

Lightness and junctions. Perception, 26, 379-395.

todorovic_benary3_4(ppd=32, pad=True)

Todorovic variation of Benarys cross as shown in Robinson, Hammon, & de Sa (2007) Fig 1z. Only contains the last two targets (3-4).

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (2001).

A multiscale spatial filtering account of the Wertheimer-Benary effect and the corrugated Mondrian. Vision Research, 41, 2487-2502.

Todorovic, D. (1997).

Lightness and junctions. Perception, 26, 379-395.

todorovic_benary1_2_3_4(ppd=32, pad=True)

Todorovic variation of Benarys cross as shown in Robinson, Hammon, & de Sa (2007) Fig 1z. Contains all four targets (1-2-3-4).

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Blakeslee, B., & McCourt, M. E. (2001).

A multiscale spatial filtering account of the Wertheimer-Benary effect and the corrugated Mondrian. Vision Research, 41, 2487-2502.

Todorovic, D. (1997).

Lightness and junctions. Perception, 26, 379-395.

bullseye_thin(ppd=32, pad=True)

Bullseye stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1aa. Target size: 0.608x0.608 deg Ring widths: 0.122 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Bindman, D., & Chubb, C. (2004).

Brightness assimilation in bullseye displays. Vision Research, 44, 309-319. https://doi.org/10.1016/S0042-6989(03)00430-9

bullseye_thick(ppd=32, pad=True)

Bullseye stimulus as shown in Robinson, Hammon, & de Sa (2007) Fig 1bb. Target size: 0.608x0.608 deg Ring widths: 0.243 deg

Parameters:

• ppd (int) – Resolution of stimulus in pixels per degree. (default: 32)

• pad (bool) – If True, include padding to 32x32 deg (default: True)

Returns:

dict with the stimulus (key: “img”) and target mask (key: “target_mask”) and additional keys containing stimulus parameters

Return type:

dict of str

References

Bindman, D., & Chubb, C. (2004).

Brightness assimilation in bullseye displays. Vision Research, 44, 309-319. https://doi.org/10.1016/S0042-6989(03)00430-9