Cropped photo larger than original?

I’m having a hard time wrapping my head round how PL8 is cropping RAF files from my Fujifilm X-T5. The resolution of the camera is 7728 x 5152. I just applied a crop to an image using options Manual, Unconstrained. In the sidebar I see this:

7728 x 5152 (crop: 7923 x 5006)

How is a cropped image larger than the original? It seems to be related to distortion correction, because earlier I brought a RAW image in, applied distortion corrections and saved it as a DNG. That file was saved with dimensions 8020 x 5152.

I’ve read other reports here on distortion correction cropping less than Lightroom does, but how are cropped images larger? What am I missing?

This is the DxO effect :wink:

The sensor frame is larger than advertised.
This is due to the performance of DxO profiles.

Pascal

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Try the preset “no corrections”. Then you’ll have the right size. I think applying optical corrections creates an image slightly larger then the original.

George

Thanks for the responses. I get that DxO profiles my save a larger image due to corrections, but that would not explain the behavior I see where a simple crop makes the image larger.

Depends on what is used as the original. PL seems to use the optical corrected as the original.
Not only larger. One side is longer, the other is shorter.

George

Lens distortion correction often stretches the image in vertical and/or horizontal directions.

But to make a rectangular of it it must add pixels. That wasn’t the behaviour before PL8.

George

Hi, George. Are you saying that because you’re using the Compare function? Or is something else different in PL8? In Compare, you should be able to specify whether or not optical corrections are applied in the reference image. Nevertheless, I recommend comparing two virtual copies to see how optical corrections affect the size of an image.

Before PL8 the image size after optical corrections was the sensor size. Now it’s called a crop and is larger as the original. If you export that image you get the larger image size.
If optical corrections mean local expanding rows and columns then you don’t get a rectangular. In my thoughts a rectangular can be archived either by cropping to the originel dimensions, the old way, or by adding content/pixels to archive a larger image, what happens now.

George

A new article just published by DxO to explain the workings behind DxO’s Optics Modules includes the following:

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Correcting optical distortion often involves stretching the image thereby making it larger than the original.

After enabling optical correction, go to the crop tool and enable Original aspect ratio and then look at the crop rectangle and you may see the image is cropped to retain the original aspect ratio.

This happens to most of my images.

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