bessel#
You can find an interactive version of this example here
- stimupy.components.waves.bessel(visual_size=None, ppd=None, shape=None, frequency=None, order=0, intensities=(1.0, 0.0), origin='mean')#
Draw a Bessel stimulus, i.e. draw circular rings following an nth order Bessel function of a given frequency.
- 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
order (int) – n-th order Bessel function
intensities ((float, float)) – intensity values of rings, first value indicating center intensity
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 with the stimulus (key: “img”), empty mask (key: “ring_mask”), and additional keys containing stimulus parameters
- Return type: