Image degradation

jakeblu

jakeblu

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Name
Steve
Edit My Images
Yes
I'm having some issues at the moment with regard to some of my images. For example


Chaffinch by Jake Blue, on Flickr

This chaffinch was high up in the tree and it was at the usable limit of my zoom so is pretty much a 100% crop. What I would normally expect when viewing this on Flickr is that if I clicked the image it would enlarge but because this is pretty much at 100% already then I would expect very little, if any change, but thats not the case. Clicking the image seems to zoom in to around 200% which obviously doesn't look good. I maybe could put that down to issues with Flickr, but I have noticed it also happens in Lightroom mobile on the iPad, and the Mac. Choosing 1:1 in Lightroom CC zooms the cropped image to an unacceptable level, leaving it pixelated. I also have Affinity on iPad and it doesn't seem to do it with that.

Anyone any idea what the problem might be, 'cos I'm stuck
 
Did you apply any resizing when you exported from LR? I normally export at 2400PX on the longest side, but if I'd cropped in the manner you describe the LR would upscale the image on export.
 
steve_lyt said:
im assuming its a jpeg, if it is the max zoom I have ever managed is %150
Click to expand...
It’s a RAW image processed on Lightroom mobile on my iPad
ancient_mariner said:
Did you apply any resizing when you exported from LR? I normally export at 2400PX on the longest side, but if I'd cropped in the manner you describe the LR would upscale the image on export.
Click to expand...
The cropped image, from memory, is about 1800px on the longest side. I wondered if Lightroom was upscaling it on export but it also seems to be doing that in the app itself because when zooming in at 1:1 it’s clearly displaying at more than 100%.
 
I do not use LR mobile so may be completely wrong. However, I thought Mobile used the preview image and when you connect back to the disk with the main images stored, the full image can be updated with any new editing. If you are just working on the preview, it may be limited in resolution.

Dave
 
Dave Canon said:
I do not use LR mobile so may be completely wrong. However, I thought Mobile used the preview image and when you connect back to the disk with the main images stored, the full image can be updated with any new editing. If you are just working on the preview, it may be limited in resolution.

Dave
Click to expand...
I load the raw files directly into Lightroom mobile, I only edit now on the iPad. I don’t use smart previews so I should be working on the full file, unlessI’ve completely got that wrong.
 
ancient_mariner said:
Maybe it's a bug in LR mobile?
Click to expand...

I've googled it but I'm not finding anything similar.

steve_lyt said:
what are the dimensions of the original image, dependant on this. try a crop it may work
Click to expand...

I'm not sure what you suggesting, the image is already cropped. Original dimensions are 5185 x 3188 its cropped down to 1014 x 1351. Like I say in my original post its a big crop.
 
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Do you have a high resolution monitor? Something much over 100ppi native?

Many applications, web browsers included, will "pixel double" images when it sees a system with a high resolution monitor so that images do not appear too small.
PS and LR both have a low resolution mode which makes the program use pixel doubling instead of the native resolution for images being edited... useful for web images (so they look the same at 100% as they will in a browser). Some web browsers also have the ability for you to disable the automatic image scaling... that will work for your computer; but you still have the other viewers with high resolution monitors who leave their browsers w/ the default setting...

FWIW, I do not know exactly what is considered a high resolution "2x" monitor... I know Mac Retina's are...
Edit, I just read you're using an iPad... it has a 2x retina display.
 
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sk66 said:
Do you have a high resolution monitor? Something much over 100ppi native?

Many applications, web browsers included, will "pixel double" images when it sees a system with a high resolution monitor so that images do not appear too small.
PS and LR both have a low resolution mode which makes the program use pixel doubling instead of the native resolution for images being edited... useful for web images (so they look the same at 100% as they will in a browser). Some web browsers also have the ability for you to disable the automatic image scaling... that will work for your computer; but you still have the other viewers with high resolution monitors who leave their browsers w/ the default setting...

FWIW, I do not know exactly what is considered a high resolution "2x" monitor... I know Mac Retina's are...
Edit, I just read you're using an iPad... it has a 2x retina display.
Click to expand...
Thanks for that Steven, that seems as plausible an explanation to anything I've managed to discover.
 
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