elisa

I have tried before all the possible combinations of with/without "snapping", "force pixel alignment" and "move by whole pixels" and none solve the problem. Only manually removing the decimal values on the X/Y coordinates fixes the loss of sharpness. I understand that in some cases you may want to move objects by subpixel values. But in that case, one is likely to be doing those movements manually and for other specific reasons than centring. I cannot think of any case when somebody that is using the Alignment tool is willing to compromise the sharpness of the image for having it perfectly centred to the subpixel level. Perhaps the Alignment tool should in fact round up (or down) to an integer the X/Y coordinates to avoid the loss of sharpness. Or there could be an option in the Preferences to choose that as the standard behaviour of the Alignment tool.

Thank you @loukash, that somehow solved my problem. Once I can see decimal places in the Transform panel, I noticed that after centre-aligning the image the value for X had decimal units (2480.5 px). Removing the decimal units from that value (2480 px) fixed the loss of sharpness in the image. I still don't really understand why this happens and I don't know if it is supposed to be like this by design, but in my opinion, if I use the Alignment tool provided by AF I should not need to manually change the X/Y values to avoid loss of sharpness. Sharpness should not be compromised by layer movements.

No, I don't think so. These are the values that appear in the Transform Panel when I select the object

I am working with a set of images to which I remove the white background and then want to align them in the middle and center of the page. I have noticed that when the image is aligned , there is a loss in sharpness, which should not happen. If instead of using the Alignment tool I move the layer manually, there is no loss in sharpness with small movements, but if I move the layer a larger "distance" the problem persists. To be sure that this was a loss of sharpness on the actual image and not an on-screen effect, I exported the image as jpg before and after aligning, and the loss of sharpness is also evident in the jpg files. Bellow are two screenshots, the first shows the original image (after removing the background) and the second after centre-aligning. Image is zoomed in to see the effect more clearly. I'm using the latest Affinity Photo version (1.9.1) on a fully updated MacBook Pro.

Yes, the issue seems to be the same as I encountered. In my case, the scans where done using Canon CanoScan LiDE 220.

File is uploaded!

I have several high resolution scans saved as .tif files. They are about 3500x5000 px in size with a resolution of 600 px per inch. I have no problem opening the files in Photoshop or even on Preview, but when I try to open the files in Affinity Photo the images appear distorted and with extreme colour changes. This problem happens with all the images I have of that size and resolution. Slightly smaller images (2500x3500 px) at the same resolution (600px per inch) open without any problems. The top half all the image is always fine, with alterations in the image and colour appearing in the bottom half. Is there a resolution/size limit for .tif files to be opened in Affinity Photo? See below an example: Picture 1: image as it should be, opened in Photoshop Picture 2: image opened in Affinity Photo I am running the latest version of Affinity Photo (downloaded today from your website) in a fully updated MacBook Pro.