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Split circulars into bullseyes, rings
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JorisVincent committed Mar 21, 2023
1 parent c30c9e1 commit eca182a
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4 changes: 4 additions & 0 deletions stimupy/__init__.py
Expand Up @@ -2,6 +2,7 @@

from . import (
benarys,
bullseyes,
checkerboards,
components,
cornsweets,
Expand All @@ -17,6 +18,7 @@
noises,
plaids,
ponzos,
rings,
sbcs,
todorovics,
utils,
Expand All @@ -27,6 +29,7 @@

__stimuli__ = [
"benarys",
"bullseyes",
"checkerboards",
"cornsweets",
"cubes",
Expand All @@ -39,6 +42,7 @@
"mueller_lyers",
"plaids",
"ponzos",
"rings",
"sbcs",
"todorovics",
"waves",
Expand Down
166 changes: 32 additions & 134 deletions stimupy/illusions/circulars.py → stimupy/bullseyes.py
@@ -1,130 +1,10 @@
import numpy as np

from stimupy.utils import resolution, stack_dicts
from stimupy.waves import square_radial as rings

__all__ = ["rings", "two_sided_rings", "bullseye", "two_sided_bullseye"]


def two_sided_rings(
visual_size=None,
ppd=None,
shape=None,
frequency=None,
n_rings=None,
ring_width=None,
phase_shift=0,
target_indices=None,
intensity_target=0.5,
intensity_rings=(1.0, 0.0),
intensity_background=0.5,
origin="mean",
):
"""Two-sided circular grating, with one or more target rings
Specification of the number of rings, and their width can be done in two ways:
a ring_width (in degrees) and n_rings, and/or by specifying the spatial frequency
of a circular grating (in cycles per degree)
The total shape (in pixels) and visual size (in degrees) has to match the
specification of the rings and their widths.
Thus, not all 6 parameters (visual_size, ppd, shape, frequency, ring_width, n_rings)
have to be specified, as long as both the resolution, and the distribution of rings,
can be resolved.
Note: all rings in a grating have the same width -- if more control is required
see disc_and_rings
Parameters
----------
visual_size : Sequence[Number, Number], Number, or None (default)
visual size [height, width] of image, in degrees
ppd : Sequence[Number, Number], Number, or None (default)
pixels per degree [vertical, horizontal]
shape : Sequence[Number, Number], Number, or None (default)
shape [height, width] of image, in pixels
frequency : Number, or None (default)
spatial frequency of circular grating, in cycles per degree
n_rings : int, or None (default)
number of rings
ring_width : Number, or None (default)
width of a single ring, in degrees
phase_shift : float
phase shift of grating in degrees
target_indices : int or Sequence[int, ] (optional)
indices of target discs. If not specified, use middle ring (round down)
intensity_target : float (optional)
intensity value of target ring(s), by default 0.5
intensity_rings : Sequence[Number, ...]
intensity value for each ring, from inside to out, by default [1,0]
If fewer intensities are passed than number of radii, cycles through intensities
intensity_background : float (optional)
intensity value of background, by default 0.5
origin : "corner", "mean" or "center"
if "corner": set origin to upper left corner
if "mean": set origin to hypothetical image center (default)
if "center": set origin to real center (closest existing value to mean)
Returns
-------
dict[str, Any]
dict with the stimulus (key: "img"),
mask with integer index for each target (key: "target_mask"),
and additional keys containing stimulus parameters
from stimupy.waves import square_radial

References
----------
Hong, S. W., and Shevell, S. K. (2004).
Brightness contrast and assimilation from patterned inducing backgrounds.
Vision Research, 44, 35-43.
https://doi.org/10.1016/j.visres.2003.07.010
Howe, P. D. L. (2005).
White's effect:
removing the junctions but preserving the strength of the illusion.
Perception, 34, 557-564.
https://doi.org/10.1068/p5414
"""
__all__ = ["circular", "circular_two_sided"]

# Resolve resolution
shape, visual_size, ppd = resolution.resolve(shape=shape, visual_size=visual_size, ppd=ppd)

stim1 = rings(
visual_size=(visual_size[0], visual_size[1] / 2),
ppd=ppd,
frequency=frequency,
n_rings=n_rings,
ring_width=ring_width,
phase_shift=phase_shift,
target_indices=target_indices,
intensity_target=intensity_target,
intensity_rings=intensity_rings,
intensity_background=intensity_background,
origin=origin,
clip=True,
)

stim2 = rings(
visual_size=(visual_size[0], visual_size[1] / 2),
ppd=ppd,
frequency=frequency,
n_rings=n_rings,
ring_width=ring_width,
phase_shift=phase_shift,
target_indices=target_indices,
intensity_target=intensity_target,
intensity_rings=intensity_rings[::-1],
intensity_background=intensity_background,
origin=origin,
clip=True,
)

stim = stack_dicts(stim1, stim2)
stim["shape"] = shape
stim["visual_size"] = visual_size
return stim


def bullseye(
def circular(
visual_size=None,
ppd=None,
shape=None,
Expand Down Expand Up @@ -209,7 +89,7 @@ def bullseye(
Perception, 34, 557-564.
https://doi.org/10.1068/p5414
"""
stim = rings(
stim = square_radial(
visual_size=visual_size,
ppd=ppd,
shape=shape,
Expand All @@ -227,7 +107,7 @@ def bullseye(
return stim


def two_sided_bullseye(
def circular_two_sided(
visual_size=None,
ppd=None,
shape=None,
Expand Down Expand Up @@ -313,7 +193,7 @@ def two_sided_bullseye(
# Resolve resolution
shape, visual_size, ppd = resolution.resolve(shape=shape, visual_size=visual_size, ppd=ppd)

stim1 = bullseye(
stim1 = circular(
visual_size=(visual_size[0], visual_size[1] / 2),
ppd=ppd,
frequency=frequency,
Expand All @@ -327,7 +207,7 @@ def two_sided_bullseye(
clip=True,
)

stim2 = bullseye(
stim2 = circular(
visual_size=(visual_size[0], visual_size[1] / 2),
ppd=ppd,
frequency=frequency,
Expand All @@ -347,14 +227,32 @@ def two_sided_bullseye(
return stim


if __name__ == "__main__":
from stimupy.utils import plot_stimuli
def overview(**kwargs):
"""Generate example stimuli from this module
stims = {
"rings": rings(visual_size=(8, 8), ppd=32, frequency=1.0, clip=True),
"two_sided_rings": two_sided_rings(visual_size=(8, 8), ppd=32, frequency=1.0),
"bullseye": bullseye(visual_size=(8, 8), ppd=32, frequency=1.0),
"two_sided_bullseye": two_sided_bullseye(visual_size=(8, 16), ppd=32, frequency=1.0),
Returns
-------
stims : dict
dict with all stimuli containing individual stimulus dicts.
"""
default_params = {
"visual_size": (10, 10),
"ppd": 30,
}
default_params.update(kwargs)

# fmt: off
stimuli = {
"circular": circular(**default_params, frequency=1.0, clip=True),
"circular, two sided": circular_two_sided(**default_params, frequency=1.0),
}
# fmt: on

return stimuli


if __name__ == "__main__":
from stimupy.utils import plot_stimuli

stims = overview()
plot_stimuli(stims, mask=True, save=None)
7 changes: 1 addition & 6 deletions stimupy/illusions/__init__.py
@@ -1,4 +1,4 @@
from . import angulars, circulars, frames
from . import angulars, frames


def create_overview():
Expand Down Expand Up @@ -26,11 +26,6 @@ def create_overview():
stims = {
# Angular
"pinwheel": angulars.pinwheel(**p, n_segments=8, target_width=1, target_indices=3),
# Circular
"circular_rings": circulars.rings(**p, frequency=1.0),
"circular_rings_two_sided": circulars.two_sided_rings(**p, frequency=1.0),
"circular_bullseye": circulars.bullseye(**p, frequency=1.0),
"circular_bullseye_two_sided": circulars.two_sided_bullseye(**p, frequency=1.0),
# Frames
"frames": frames.rings(**p, frequency=0.5, target_indices=3),
"frames_general": frames.rings_generalized(**p, radii=(1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5), target_indices=3),
Expand Down

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