I've been looking at the GratingDemo.m file and I'm trying to
understand some of the math behind it.
The "gaussianSpaceConstant" variable is defined as
= periodsCoveredByOneStandardDeviation * pixelsPerPeriod;
and later the "circularGaussianMaskMatrix" is defined as
= exp(-((x.^2) + (y.^2)) / (gaussianSpaceConstant^2));
Strictly speaking, should the gaussianSpaceConstant value be
multiplied by 2 if it is related to periods per one standard
deviation? My mathmatical ability is some what rusty so forgive me
for simple questions.
I was also wondering if you were intending to update the
GratingDemo.m to draw gratings similarly to the other grating demos
(e.g. Showtime.m), so that when you change the orientation of the
bars you don't get a higher spatial frequency the greater the angle
value from 0 (and you get an error at angle = 90 as tan(90) is
infinity). I found a better way to do it in early on in the forums.
Many thanks in advance.
understand some of the math behind it.
The "gaussianSpaceConstant" variable is defined as
= periodsCoveredByOneStandardDeviation * pixelsPerPeriod;
and later the "circularGaussianMaskMatrix" is defined as
= exp(-((x.^2) + (y.^2)) / (gaussianSpaceConstant^2));
Strictly speaking, should the gaussianSpaceConstant value be
multiplied by 2 if it is related to periods per one standard
deviation? My mathmatical ability is some what rusty so forgive me
for simple questions.
I was also wondering if you were intending to update the
GratingDemo.m to draw gratings similarly to the other grating demos
(e.g. Showtime.m), so that when you change the orientation of the
bars you don't get a higher spatial frequency the greater the angle
value from 0 (and you get an error at angle = 90 as tan(90) is
infinity). I found a better way to do it in early on in the forums.
Many thanks in advance.