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iPhone camera app replaces person’s head with a leaf in photo

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Re: iPhone camera app replaces person’s head with a leaf in photo

#361

Post by aembleton »

trompetenaccoun wrote: post #351
TedShiller wrote: post #276

Earlier quoted context omitted.

No free lunch is right. iPhone photos look incredible on iPhone screens. They look terrible on my high resolution desktop screen. Instagram kids don't know this, but that's ok, because we don't need them to, and neither do they.

Increasingly these photo"graphs" have nothing to do with reality either. I may be part of a weird minority but when I take pictures I do it to document things, I don't want them to be all fake and wrong. Some Chinese manufacturers have taken this to a ridiculous extreme, they make normal friendly faces look outright scary. Pictures shouldn't be edited by default, the user should be given the option if they want to. A…

With a lot of phones you can have it save the raw image file so that you can convert it to jpeg yourself.

Re: iPhone camera app replaces person’s head with a leaf in photo

#362

Post by tomduncalf »

I had something like this happen the either week - someone took a photo of a group of us against a wooden wall in low light with the front camera of the iPhone 13 Pro Max, and while the photo looked great zoomed out, if you looked closely it had applied the vertical line and texture of the wooden slats to my face, so I had a sort of wooden face!

My assumption is that this is over enthusiastic ML processing trying to enhance photos in challenging conditions… makes me think of e.g. https://petapixel.com/2020/08/17/gigapixel-ai-accidentally-a...

Similarly, I’ve noticed that the iPhone 13 Pro tends to use the wide angle lens for 3x zoom photos in low light then upscale it. This makes some sense as it can capture more light and the photos look good zoomed out, but if you zoom in, you’ll see things like text and small faces have been replaced with random blurry “ML-looking” smudges.

If you want to avoid this, right now I think the only way to do so is to use a third party camera app. I use Halide and it’s excellent, it will only use the lens you have selected even if it is in challenging lighting conditions, and it applies much less processing (and you can further disable more processing if you like, I’ve not had the need).

The default camera is generally great for snapshots that you aren’t going to zoom into etc. though. Would be nice if they could tweak it to be a bit less aggressive in its processing, perhaps adding a “pro” mode or similar.

Re: iPhone camera app replaces person’s head with a leaf in photo

#365

Post by jeroenhd »

eclipxe wrote: post #239
mynameisash wrote: post #38

Earlier quoted context omitted.

Fully agree. My wife and I went out on a date about a month ago, and during it, she took a selfie of the two of us. There must have been some filter on by default because our faces looked perfectly lit, our skin completely blemish-free, no smile lines, etc. It was a great picture, but I remarked immediately that it didn't look real. And I don't want that -- it's not us but an idealized, optimized version of us. I sim…

Are you sure it was a filter or just a lower-quality front facing camera that didn't capture details in low light like blemishes and smile lines? In an effort to reduce noise, sometimes a camera over-smoothes the image - not as a way to make your imperfections disappear, but to make the noise from the high ISO shot disappear.

My phone has a button in the camera app labeled "AI" and it does exactly this. Even in low light conditions you can see the differences between denoised and smoothed skin.

It's also clearly optimized for Chinese faces, which makes for some comedic side effects sometimes when it tries to apply what seems to be the beauty standard in China to my very much non-Asian face structure.

Sadly, there's no differentiation between the stupid face filter and the landscape-fixing AI. I like the AI processing for a lot of static scenes where there are no people around, because the small camera sensor simply can't catch the necessary details, but I always forget to turn it on because of the stupid face filter that comes with it.

Re: iPhone camera app replaces person’s head with a leaf in photo

#367

Post by Derbasti »

matsemann wrote: post #12

I hate how much phones lately alters the images. Of course it most of the time makes the images look better, and cameras are a big selling point on a phone. But I don't like how my photos of people suddenly have a filter applied to the faces, how a picture of leaves during fall have vibrance exaggerated, how the sky looks clearer than it really did.

A while ago I was trying to compare a few of my cameras. It was a cloudy day in early fall. All three cameras and my eyes agreed that the sky was dull-grey and the leaves on the trees drab-brown.

To the iPhone, however, the sky was more blue than grey, and the leaves had an autumn-orange hue instead of brown. It wasn't a complete fake, and if I had only had the iPhone picture I wouldn't have noticed. But it was just a little bit better-than-real, and in direct comparison obviously incorrect.

This, more than anything, discounted the iPhone camera for my uses.

Re: iPhone camera app replaces person’s head with a leaf in photo

#368

Post by hughrr »

wtallis wrote: post #195
hughrr wrote: post #186

Earlier quoted context omitted.

I’ve got nearly the same CPU in my iPad, MacBook and iPhone. I can do the processing on any device…

You don't have the same heatsink on all three, and not necessarily the same number of cores.

All the image processing is short bursts so this is mostly irrelevant.

Re: iPhone camera app replaces person’s head with a leaf in photo

#369

Post by 1_player »

dannyw wrote: post #282
1_player wrote: post #99

Earlier quoted context omitted.

Your probability estimate is off by a dozen orders of magnitude. As a back of the napkin estimate, an iPhone with 8GB has 64 billion bits that can be flipped. One bit flip per week per user would already be extremely bad, as it would mean on average one random crash or case of data corruption per week. If you suppose the bit flip happens in the CPU registers, the number of state changes on a modern CPU is so incredib…

also most cpus have ecc on registers.

I didn't know that, but it makes a lot of sense.
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