Damon Bell
Here is some math to further explain it……
If you image from face Crop was save as 8 x 10 at 75 PPI then that mean after cropping there was only 400 x 500 pixels left over after cropping. That is how Face Crop decided on 50 PPI. If the final image was 8×10 at 75 PPI then there were 600 x 750 pixels left after cropping which is how it came up with 75 PPI.
When you crop, there are less pixel than when the image started. The closer you crop, the less the amount of pixels are that are left over. Say there are only 400 x 500 pixels left over after cropped off the majority of the image and you want 8×10 at 300PPI. This is 2400×3000 pixel that you “want” but you only have 400×500 pixels left over after cropping. It ill look terrible to upscale an image from 400×500. So that is why be default, Face Crop doesn’t resize. PPI just becomes a factor of wat is left over divided by the number of inches you want it at.
If you turn on resample, then you can force Face Crop to upscale you images after cropping. So you can force it to save as 8×10 at 300 PPI for 2400×3000 pixels. However, if your crops don’t have nearly that many pixel after being cropped and you force it to enlarge the image then it can look bad.
This isn’t a Pixnub thing. This is a basic digital photography thing.
Looking at just PPI is meaningless. What you need to look at is the actual total pixel dimensions.
For example, say you are shooting a Nikon Z9, then you total pixel count before cropping would be 8256 x 5504 pixels. Now say you are shooting full body and the person only takes up 75% of of the frame. Then the person is around 6000 pixels tall. No do a close crop on the face. You are probably left with 1000 pixels high in the final crop because most of the frame has now been cropped off. Now if you want a 10 inch print, and only have 1000 pixels tall of an image to work with, you get 100 Pixels Per Inch. If you force it to 300 PPI and up to 3000 Pixels tall then you just upscaled by 300%.
See this video
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This reply was modified 1 week, 6 days ago by
Damon Bell.
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This reply was modified 1 week, 6 days ago by