Perhaps a silly question but I am trying to get my head around this.
I will be presenting images and using “norm” units seems to result in some distortion of the images.
I now want to give it a try with “height” units but I am not sure how to convert pixels to height units.
If of any help, my screen resolution is 1366 x 768 (which I believe it makes it a 16:9 aspect ratio) and each image is 286 x 397.
Pixels can be considered a proportion of height. So 1 unit of height should equate to win.size[1] in pixels 0.5 height should correspond to win.size[1]/2 and so on. In the newest release (2021.2) you can try the inbuilt demo which gives a nice visualisation of different units. This can be accessed from builder using Demos > Understanding PsychoPy > spatial Units. You shouldn’t need to apply any conversion using code and PsychoPy should apply this anyway when units are height.
Thanks @Becca for your prompt reply. I think I get it.
Unfortunately I cannot upgrade psychopy just yet as my exp does not run with this newest version - too much code to find out why it does not, it’s an online staircase exp.