Image size for AI

Forum|Forum|2 years ago
October 10, 2023
2 replies
7134 views

The Adobe guidelines says " ... meet the Adobe Stock minimum file size requirement of 4 megapixels. Use the Enhance tool in Lightroom to increase the original file size, but don’t go beyond 6 to 8 megapixels."

But isn't that a rather small image ..? I believe that images usually are almost 20 megapixels - e.g. 5.000 x 3.500 pixels? Do I misunderstand something?

Troubleshooting

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daniellei4510

Community Expert

I normally upscale AI images up to between 6000 and 9000 pixels on the longest side. It CAN be done using the appropriate AI upscaling tools and following up with some additional sharpening methods in Photoshop (along with CAREFUL inspection of the result). If an image starts falling apart during the process and begins showing signs of softness, over-sharping, artificacts, haloing and other issues that are beyond the scope of being corrected in Photoshop, they are consigned to the trash. I figure it's a rare occasion when someone would require an image that is 9000 pixels wide, but virtually everyone knows how to reduce an image without the need of special software. While if someone purchases a 6 inch image and needs it three times that size, they may not have access to tools or expertise that would allow them to do so successfully.

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O

oleschwanderAuthor

Legend

9.000 is extremely big. It's amazing you can go from 1.000 to 9.000 ...!

daniellei4510

Community Expert

Yep. 30" at 300 dpi. Works best with portraits (fashion, skin care, children, animals, which I tend to specialize in), where as landscapes, food, wallpapers and the like can start falling apart if I go beyond 20." When it comes to portraits, I hold to the theory that if the eyess are sharp, the entire image will SEEM sharp (within reason, of course). I also rely heavily on facial restoration software, starting with the original image size. Following a 30" upscale, the eyes, lips and nostrils can often become pixelated, so I'll run the faces alone through facial restoration software a second time. I'll then work on one eye to round out the iris, stroke it to sharpen the edges if necessariy, then center the pupils. I'll then copy that iris and paste it over the other iris so that the catchlights are identical (as they would be in the majority of actual photographs). Takes awhile. But at least no one can accuse me for uploading 1000 AI images at a time. Or even twenty for that matter. 🙂

Adobe Community Expert | If you can't fix it, hide it; if you can't hide it, delete it.

Nancy OShea

Community Expert

See these links for more details:

Nancy O'Shea— Product User & Community Expert

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oleschwanderAuthor

Legend

Thanks for the usefull links, Nancy. But I was only interested to find out if 6 to 8 megapixels are not very small images.

Nancy OShea

Community Expert

Most modern cameras shoot in 24-50 megapixel range, far more than what AI services can generate.

You should NOT upscale a tiny image beyond a certain threshold. 2x linear resolution is about the best you can do with commercial Firefly in Lightroom as an example. If you go much higher than that, you'll introduce unwanted distortion & artifacts.

Nancy O'Shea— Product User & Community Expert

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