Live data from Hacker News

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

twitter.com

321–330 of 467 posts

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

#322
post #100

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…

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.

You actually can't. The RAW an iPhone will give you is highly, highly processed.

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

#323

Earlier quoted context omitted.

But that CPU shouldn't really do anything other than shoveling raw sensor data to flash as fast as possible. All the processing can happen on your workstation (or an iPad or whatever).

You don't want to shovel 12MP 14-bit-effective multi-frame raw pixel data along its metadata into the flash...

Sure I do. Or very minimally compressed.

Hell, one of the major selling points of the most recent iphones is prores recording! Dump half a second of that into a file. If that means a half-full phone can only fit a thousand photos before it's emptied, then sure I'll take it.

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

#324
post #172

Earlier quoted context omitted.

It is not accurate to compare the capacity in Amp-hours because the Nikon EN-EL15C battery has twice the voltage (two Li-ion cells in series) of a single-cell smartphone battery.

Napkin math: 7V/2280mAh = 16Wh or equivalent to 3.7V/4300mAh (USB power banks are always measured and marked in 3.7V and mAh as unit to produce largest comparable numbers)

If you want napkin math then just multiply 2280 by two. It'll be faster and more accurate than converting to watt hours.

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

#325
post #302

Earlier quoted context omitted.

You aren't really comparing apples to apples here. Android is an open source operating system used by dozens of different hardware vendors. Crapware is only installed by some vendors. And iphone rarely has the best displays. They usually trade places with a few other Android vendors for best camera. As for security, iphone usually is the best. But it varies with different Android vendors in how well or how poorly the…

The iPhone 13 literally has the best display currently available, and more importantly, it's colour managed correctly. It is manufactured by Samsung, and they use the same panel in their own flagship phone, but they don't colour-manage as well or as consistently, making the iPhone the overall winner in my book. Other Android manufacturers have markedly worse displays in every metric. The fact that you don't appreciat…

Actually, it just doesn't. Firstly Apple doesn't just use Samsung, they also use BOE and LG panels, so they'd have to be calibrated to the lesser of either.

Unless there is massive unit variance, which is even worse.

So much for taste :)

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

#326
post #200

Earlier quoted context omitted.

If linear interpolated zoom isn't allowed... Think about analog/optical/chemical photography. In the old days did juries look at camera negatives with a loupe? Of course not, they looked at enlargements. What "algorithm" does an optical enlarger use?

Continuously linear implemented with an analog device vs digital “linear” (ie, watch your floats! Take care of quanization error! Have you kept the colors separated according to the Beyer pattern?). No one has a problem with a mathematically perfect linear transformation, and film enlargers come very close to that ideal (yes they distort, but in a very obvious way and by degrading detail not adding detail that isn't…

Film development is actually VERY, VERY far from linear.

Because of film grain, it's not continuous either, but actually discrete too.

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

#327
post #161
post #19

Well it’s in telephoto and 1/121 exposure so the photographer was probably wobbling around like mad when it was taken and the overlay and computational image stuff got confused. I’m fine with this. I use a mini tripod with my 13 pro on telephoto. Back in the old days this would just look like ass instead.

I would rate any camera that does this as 1/100. It cannot possibly be a worse camera. How anyone that have an interest in photography can see swapping a head with a leaf as just fine is beyond me. It's no better than using Snapchat like filters and calling it raw. It's is utterly broken and should be removed ASAP from all iPhones.

Are you suggesting that if you have a product that performs better than the previous version 99.999999% of the time, but that 0.000001% of the time it performs terribly, in your opinion, the new version is worse?

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

#328

Earlier quoted context omitted.

Modern phones take long exposures and try to make sense of it by analyzing it. Basically, a one second really dark video can be summed up into one very blurry but bright enough photo. But if you carefully move each frame to compensate for camera movement when summing it up - you might also get a sharp picture. But then the subject moves, or a leaf moves, and the algorithm has to decide which parts of the photo should…

Does anything like that exist as a computer-attachable cam, e.g. for Linux? Or are we stuck with <2015 cameras unless they come as part of a smartphone?

There is software to do that, yes. Many cameras are able to do smart multiframe stacking, even fairly old ones.

It's just that photographers would rather not have to rely on this, because it has a lot of issues.

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

#329

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…

No free lunch, but an incredibly good value lunch. The quality that comes out of phone cameras is remarkable. And the times it messes up are so rare that it becomes a talking point worthy of hundreds of comments.

>The quality that comes out of phone cameras is remarkable

It's more than that, it's completely mind blowing when you compare it to a DSLR.

In "good" lightning condition, your iphone will give you a picture 75% as good as what you could get with a 4k$ fullframe DSLR kit that's 10" long and weight a few pounds.

the problem is when light is not perfect, that's when the bigger lens/sensor are worth it even for a beginner that doesn't know much about photography. And if you need to edit your pictures, you don't get those extra stops of exposure up or down because the iphone already needed all the dynamic range of the sensor to create the picture you got.

It would be very interesting to see a colab between apple and a DSLR company to get the best of both world. A large FF senor and lens ecosystem like Canon combined with whatever dark magic Apple is doing on their tiny sensor would have massive potential.

Post reply on HN