[solved] Gabor patch parameters
I have some trouble with the gabor patch parameters in the OpenSesame function. I wanted to know how exactly spatial frequency is defined and how you can define contrast of the gabor gratings in OpenSesame using this function.
From what I understood the gabor gratings’ spatial frequency in contemporary literature is mostly defined in cycles per degree (that is visual angle). In the OpenSesame function however, it is defined in cycles per pixel, creating different gratings when filling in values defined as in cycles per degree. So my question is how do you come from the one value to the other?
The other parameter, contrast, is not entirely clear to me either. It is not definable in the function or did I overlook something? Or is it solely based on the difference between the two RGB values.
Hope you guys can help me out! Id really appreciate it!