Hello, first time user here. I’ve found that PR4 reduces the pixel count on my Canon R7 CR3 files, and I wanted to see if there is anything I can do to prevent that.
My native CR3 files are 6984 x 4660 pixels, and after processing on PR4 they output to 6960 x 4640. I get the same result with lens distortion set to any of the options or with it disabled. The images don’t seem to be cropped, it appears that DxO is resizing the image to a new pixel count.
To be clear, I’m not talking about file size in MB… I understand the differences between raw files and processed DNG file sizes.
While the difference might seem trivial, this causes some problems if I want to copy masks from one program to the next because they won’t line up, which causes issues with my edits. So I’m looking for a way to prevent this from happening or for some sort of workaround.
Many sensors have larger active area than what is used to generate the final image. One of the reasons for this might be ignoring pixels on the edges, which may catch some reflections from the sensor’s construction. I see that on some of my Nikons too, in which case the jpeg generated by the camera or any software aware of the issue are smaller than reported RAW active area pixel dimensions. The intended cropped size can usually be found in MakerNotes.
PhotoLab (PL) distortion correction and some other geometric corrections may make pixel count larger than the original – typically width gets larger for wide lenses. But that’s another reason, already excluded by you.
Which camera is it?
What are the picture dimensions of camera jpeg, or jpeg generated by DPP from CR3, or full resolution jpeg embedded in CR3 (if it’s there)?
As an example, Nikon Z8 raw has 8280 x 5520 pixels, of which only 8256 x 5504 are used for the final image. Exiftool show this (for Canon the crop info may be somewhere else):
Sorry, missed that. For R7 it looks similar to Z8. Nothing to worry, it’s normal. I’ve seen some R7 jpegs generated from raws by ACR and they are also 6960 x 4640 in size.
Thanks for the detailed response. I recognize that this might be normal, and under most circumstances the difference would be insignificant, but I reuse drawn masks from my DxO DNGs, and this is enough to cause problems with mask size and position.
I was hoping for some way to prevent or mitigate that. Any thoughts are appreciated.
Update: I’m doing more troubleshooting and it’s looking more like the problem is with raw editor rather than DxO, so please disregard this post for the time being.