Hi All, I would like to make some vanishing optotypes for my experiment and was wondering if I can make them via PsychoPy.
Thank you so much for your help in advance.
Best Wishes,
Nabin
Can you provide more details?
Basically, I would like to make various optotypes on a grey background with borders consisting of black and white stripes wherein the combined luminance of the border must be similar to the background at a particular distance. (please see picture below) Also I would like the black and white stripe to become narrower and narrower with different difficulty level.
That’s an interesting one. It’s not so much of a PsychoPy-specific question as a Python programming one, though. If each line in your figure can be defined as a mathematical function, then yes, I guess you could in a relatively straightforward way.
If you want to take a pre-existing piece of line art and generate a figure from it, that would require some fancy image processing algorithm I guess. How do others do it? (i.e. are there useful details given in methods sections of relevant papers that could be used a s a guide).
I don’t have it available here, but I have a program where I make a polygon blink by changing the opacity based on time. I set a variable in a code object for the opacity and set it with something like
opacity = 0.5*cos(2*pi*t)+0.5
I suppose you could do something similar to make your optotype vanish.