In my PsychoPy Builder experiment the image sizes are left blank, to display images in their original sizes. The exp units are in heights, the image positions are read in from condition files (set in heights). When I piloted on Pavlovia and simply left the size field blank, the images were larger. …

I use height units and the aspectRatio of each image and then set the size as [aspectRatio * imageHeight, imageHeight] where imageHeight is a constant – the proportion of the screen height desired, e.g. 0.8.

Hi @wakecarter , Thanks. I think I either don’t get it or I was not clear enough when describing the problem. In case it is the second: When I did not manipulate everything the size of the images and their positioning was okay on the 1920 x 1080 res screen, independent of the screens actual size. No…

You could set the image component to use pixel units and have the original width and height in pixels in the spreadsheet. Or you could calculate the pixels in height units (win.size[1]) and set imageHeight as imageHeightpixels / win.size[1]. As far as I’m aware you can’t just ask PsychoJS to displ…

Hi, there is definitely sth wrong w the conversion: img height in height units = img height in px / win height in px; img width = asp.ratio x img height (in height units). I redid the condition files. The spatial units are set to heights in th experimenter settings and in the image components of…

The image widths look too large. You could check them using print. [image] Wakefield's Daily Tips Blog Use Print statements When debugging, print statements can be very helpful to track down errors or unexpected behaviour. I tend to use them in one of two way…

Hi @danna is this by any chance the Directors Task you are working on?

Hi, I committed the stupidest mistake possible…mixing up the order of width and height multiple times (in the python code that added the size to the condition files). Things look okayish now, except a bit of blurriness but I read that there is not much to do with it. Of course I have to check whethe…

Pavlovia - images are not displayed in their original size

Online experiments

wakecarter February 11, 2026, 3:41pm 6

The image widths look too large. You could check them using print.

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Pavlovia - images are not displayed in their original size

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