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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

#141

Post by twofornone »

ramesh31 wrote: post #88
jiggawatts wrote: post #49

Earlier quoted context omitted.

Taste. It takes time and experience to develop, and the masses on average don't have it. As in, they might have developed taste for a few products, but not most products. Hence, the mass-market products are aimed at people with no taste, because that captures the largest slice of the consumers. Random examples: - In A/B tests, the typical personal will rate louder music as better. Hence, all bars and pubs turn their…

> Sugary, salty and fatty foods are consistently rated by typical people as more tasty than foods without them. Hence, all fast-food restaurants load their foods up with those elements instead of more expensive flavourings such as herbs and spices. I love this one. Want to convince someone with an unsophisticated palette that you are the greatest chef in history? Just start loading everything you make with butter and…

You can buy MSG on amazon and instantly make anything taste great.

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

#142

Post by KarlKemp »

johnisgood wrote: post #121
alkonaut wrote: post #29

Those of us who have been shooting large digital cameras for the past decade and are some times sad that our photos often come out unsharp in poor light compared to smartphones can at least take some joy in this “no free lunch” demonstration. If this is due to stabilization and not some background blur face detection then it’s probably not something you can (or would want to) disable. Taking a telephoto shot with a t…

I am not sure what you are trying to say here. They definitely did not ask for their face to be replaced by leaves either. Is it either unmodified, or leaves? Is not there a middle ground?

This is the "smart HDR" option on an iPhone, described as "In difficult lighting, the best parts of multiple exposures are combined into a single image".

So there is the middle ground of disabling this. Or, alternatively, just not caring about such an error once in a million shots.

(as an aside, I'm pretty sure the structure of the leaves is responsible for this error, as it's an area with usually many strong edges in a somewhat repetitive pattern. That invites misalignments.

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

#143

Post by alkonaut »

usui wrote: post #132
alkonaut wrote: post #118

Earlier quoted context omitted.

With video you can’t “cheat”. You can’t gather up a second of frames and stack to one photo. That’s what phones to quite well. You only have 1/24s (say) to get the shot before you need to get the next one. I bet an Iphone12 would have made better stills than my aging canon 60D which I try to keep at 1600 or lower. And that’s pretty remarkable to be honest.

I don't understand, why is this ruled out? Assuming that phones reach a point where this is computationally cheap, what would be so hard about having a sliding window for each frame in the video?

Nothing prevents that, but if there is a lot of movement (which would be the point of using video) then the great results aren’t as easy to get. You can’t take a still of someone dancing in a dark room with an iPhone, you can take a still of someone standing reasonably still in a dark room.

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

#144

Post by Zak »

alkonaut wrote: post #114
caslon wrote: post #100

Earlier quoted context omitted.

You can set Apple's devices to shoot RAW, and it's usually pretty great, without the painting-like qualities of its default image processing.

How raw is “raw”? If you take a long exposure in a dark room with a recent iPhone you can see the long exposure shake being removed and the picture coming out a lot sharper than it should. Would a “raw” version of that photo be a traditional long exposure or would it be the clever stacked image but with less post sharpening etc? Or is the raw even a short video sequence? (that would actually make the most sense) I ha…

Recent iPhones (and many Android phones) have optical image stabilization; an element in the lens moves to compensate if the phone shakes during the exposure. Very new iPhones (and some Android devices) also have sensor-shift image stabilization, which moves the image sensor.

These features are also available on many dedicated cameras and interchangeable camera lenses.

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

#146

Post by withinboredom »

usui wrote: post #132
alkonaut wrote: post #118

Earlier quoted context omitted.

With video you can’t “cheat”. You can’t gather up a second of frames and stack to one photo. That’s what phones to quite well. You only have 1/24s (say) to get the shot before you need to get the next one. I bet an Iphone12 would have made better stills than my aging canon 60D which I try to keep at 1600 or lower. And that’s pretty remarkable to be honest.

I don't understand, why is this ruled out? Assuming that phones reach a point where this is computationally cheap, what would be so hard about having a sliding window for each frame in the video?

The camera moving?

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

#147

Post by KarlKemp »

IgorPartola wrote: post #134
KarlKemp wrote: post #107

Earlier quoted context omitted.

Indeed. I wish I had a list of everyone parroting the wisdom that "it's all about the size of the lens, a smartphone can never be as good as a DSLR" so as to ignore their future opinions. Camera phones now beat cameras worth thousands of dollars with better software and larger R&D budgets, at least in low light performance and color gamut. Closely related: "It's impossible to just 'enhance' an image to make a license…

In theory what prevents me from using a huge lens and sensor on a DSLR or a mirrorless camera and then using the same advanced software but now running on a desktop computer or a server that is many times more powerful than a smartphone to do advanced post processing?

It's important to note that recent iPhones contain the same M1 chip as last year's MacBooks. They are not limited by processing power.

DSLR and mirrorless cameras have better optical properties. But they are held back by starting too late and being much worse when it comes to software. These cameras also are limited by their CPUs, which are a decade behind, and by their batteries, which are much smaller but expected to last for thousands of exposures.

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

#148

Post by jimnotgym »

IgorPartola wrote: post #134
KarlKemp wrote: post #107

Earlier quoted context omitted.

Indeed. I wish I had a list of everyone parroting the wisdom that "it's all about the size of the lens, a smartphone can never be as good as a DSLR" so as to ignore their future opinions. Camera phones now beat cameras worth thousands of dollars with better software and larger R&D budgets, at least in low light performance and color gamut. Closely related: "It's impossible to just 'enhance' an image to make a license…

In theory what prevents me from using a huge lens and sensor on a DSLR or a mirrorless camera and then using the same advanced software but now running on a desktop computer or a server that is many times more powerful than a smartphone to do advanced post processing?

Isn't that what Lightroom is for?

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

#149

Post by spoonjim »

judge2020 wrote: post #95
GenerocUsername wrote: post #90

Earlier quoted context omitted.

You guys are conflating 'adjusting light levels and sharness' with 'replacing whole objects in one area of scene with other objects from the scene' I think this particular big demonstrates a massive gap in what people think photoprocessing is, and what it has very recently become

Simply adjusting light levels and sharpness wouldn't produce this good/clear of a photo in the conditions presented - AI/ML image post-processing is a hard requirement for sensors like these.

But it’s also just weird. That’s not my daughter’s skin in the photo, it’s 1000 other people’s skin blended together and textured in.

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

#150

Post by alkonaut »

johnisgood wrote: post #121
alkonaut wrote: post #29

Those of us who have been shooting large digital cameras for the past decade and are some times sad that our photos often come out unsharp in poor light compared to smartphones can at least take some joy in this “no free lunch” demonstration. If this is due to stabilization and not some background blur face detection then it’s probably not something you can (or would want to) disable. Taking a telephoto shot with a t…

I am not sure what you are trying to say here. They definitely did not ask for their face to be replaced by leaves either. Is it either unmodified, or leaves? Is not there a middle ground?

They asked for their phone to make a best effort to stack many pictures into one, cleverly aligning objects as well as possible.

And the camera failed. The alternatives would have been an extremely dark picture of a person without a leaf-face, or an extremely blurry picture of a person without a leaf-face.

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