I am trying to compare an external JPG file to my current RAW data. When I select the JPG, it is shown as a smaller picture with a border while the image I am customizing remains full screen. I played around with the settings in the menu bar and eventually both images were shown full screen.
I closed the comparison and tried it again later but once again different files sizes were used. This time I have been unable to get two full size images. Any suggestions about what I am doing wrong?
Looks like the ppi resolution may be different
What happens when you compare them side by side?
In this “mode,” I can zoom in and out independently.
It must be related to PPI, but I did manage to get them displayed the same that first time. When I select side by side, I do get two images that look the same but then when I adjust the zoom percentage, the scaling changes.
The RAW image is 6000x4000 and the JPG is around 3840x2200.
You’re doing nothing wrong. But, if you compare two different sized images, of course they will appear at different sizes.
I think if the first picture (using full screen slider) had looked like the second one I might have realized the issue was picture resolution. It was also strange that I did get the slider working with the different resolutions for a little while before it got stuck looking like the first photo.
Just to emphasise that ppi is the problem, here is an original RAW file (on the right) whose dimensions are 5504px x 8256px, compared to a JPEG export of 1024px x 1536px at 72ppi…
Whereas, if I export the JPEG, at 1024px x 1536px, with a resolution of 5504ppi, to match the 24mm (1 inch) size of the short edge of the sensor, I get an almost perfect size match…
Addenda
Further experimentation somewhat nullifies what I showed above and what you get also seems to depend on the order that you select the comparison image.
But, in the end, I would say that, if you want to compare, you need to export a same size, same resolution JPEG.
It’s not a matter of ppi.
Just double click on the images so that both have the (half)window size. Then they are equal. One zoomed in more then the other.
George
