Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Cameras and Lenses

ciechanow.ski

Post reply on HN
Print view View original

211–220 of 241 posts

Re: Cameras and Lenses

#211

Post by rimliu »

formerly_proven wrote: post #180
rimliu wrote: post #153

Earlier quoted context omitted.

There are also "dual native ISO" sensors. Still different apmplification levels, but in this case it is before ADC. See https://www.youtube.com/watch?v=g8hHFt3ChZ8

"Dual native ISO" sensors don't perform different amplification before the read out amplifier or anything like that. With an image sensor you get to decide between high sensitivity and high capacity (how much light it can detect before saturating). So a highly sensitive sensor can handle less light before clipping (which makes sense). This trade-off can be tweaked by changing the size of the photodiode (bigger diode…

Maybe you should watch that video…

Re: Cameras and Lenses

#212

Post by hilbert42 »

Jaruzel wrote: post #7

Although I knew most of technical aspect described having immersed myself in Photography several years ago, I cannot express properly how GOOD this article is. The sliders and diagrams are brilliant for helping a layperson understand how it all works. Kudos!

You're right. Similarly, I cannot express how good this site really is in just a few words. Having been an enthusiastic amateur photographer for decades as well as having worked in electronic imaging for about as long, this is one of the best practical illustrations of the subject that I've come across.

I'd highly recommend it to anyone who is seriously interested in the underlying 'mechanics' of imaging.

(Incidentally, anyone whose has read my many anti-JavaScript raves, then I'd only say this is exactly how JavaScript ought to be used.)

Re: Cameras and Lenses

#213

Post by strogonoff »

strogonoff wrote: post #13

Lately an area of interest of mine in digital photography in particular is scene-referred vs. output-referred image formats and subjective perception. The author (justifiably) walks around this topic in his camera sensor overview, but the data captured by a sensor from photons hitting it doesn’t really contain a readily viewable image. Data values captured by a modern camera far exceed the ranges that can be reproduc…

To clarify, the alternative to taking control of processing scene-referred data is to use camera’s JPEG rendering of its own idea of how the scene should look.

Re: Cameras and Lenses

#214

Post by Wistar »

kruxigt wrote: post #43
echelon wrote: post #8

Earlier quoted context omitted.

You'd like their other work : https://ciechanow.ski/lights-and-shadows/ https://ciechanow.ski/gears/ https://ciechanow.ski/tesseract/ Etc. Check out the whole blog! It's amazing. These are some of the most intuitive explanations coupled with the slickest animation / demo work I've ever seen. All of that put together into crystal clear educational material is such a rare gem and requires incredible talent. Impressive…

And the articles renders so fast and so smooth on my laptop. In fact they render more smoothly and loads faster than 99% of all much much less technically advanced articles out there. Wow!

Heck, they render fast and smooth on my 3 year old iPad.

Re: Cameras and Lenses

#215

Post by mercer »

antonfire wrote: post #209
HexagonalKitten wrote: post #208

Earlier quoted context omitted.

It's not straight anywhere though. It came over years of watching CP defend literal incel terrorists beating up lesbians who refuse to have sex with them, while gaslighting the victims and defending the attacks. CP didn't coin "Cotton Ceiling" but they sure go on about it. If kinkshaming is bad, what is it to personally shame lesbians who reject men? And I didn't lead with it, I used it to explain why I found your re…

Alright, I'm pretty burned out on this conversation so this is gonna be my last post. It's been distracting me and I want my real life back. I'll just try to wrap up the bits I find interesting. > But if you mean, would I spot Blair if I didn't know them? That's more or less what I mean, but also, would you, on top of that, expect me to spot the same thing? > Do you think this means I'm reading their gender expressio…

> Alright, I'm pretty burned out on this conversation so this is gonna be my last post.

I sometimes try to have proper conversation, but these days try to make sure I'm not dealing with some form of alt-right bandwagon trolling by checking comment histories. Every single HexagonalKitten comment so far has been about how others get all upset about things, and, of course, 'immigration issues'.

It's not that I have an issue discussing these topics, but at some point I do feel I have to use some quick heuristics to weed out the trolls or 'culture wars' group-thinkers.

Re: Cameras and Lenses

#216

Post by hnuser123456 »

echelon wrote: post #8
Jaruzel wrote: post #7

Although I knew most of technical aspect described having immersed myself in Photography several years ago, I cannot express properly how GOOD this article is. The sliders and diagrams are brilliant for helping a layperson understand how it all works. Kudos!

You'd like their other work : https://ciechanow.ski/lights-and-shadows/ https://ciechanow.ski/gears/ https://ciechanow.ski/tesseract/ Etc. Check out the whole blog! It's amazing. These are some of the most intuitive explanations coupled with the slickest animation / demo work I've ever seen. All of that put together into crystal clear educational material is such a rare gem and requires incredible talent. Impressive…

Regarding the lights and shadows articles, how they hell are they getting raytraced-quality lighting, with no noise, with changes to the scene in realtime?? Are these all pre-rendered PNGs?

Re: Cameras and Lenses

#217

Post by daralthus »

codetrotter wrote: post #126
daralthus wrote: post #122

Earlier quoted context omitted.

Here's a paper on depth: http://groups.csail.mit.edu/graphics/CodedAperture/ Stanford has a class on computational imaging: http://stanford.edu/class/ee367/ I think these slides should give you a pointer to enough papers to fill a lifetime: https://web.stanford.edu/class/ee367/slides/lecture9.pdf Georgia Tech also has a class, that's on youtube and Udacity: https://www.udacity.com/course/computational-photography--ud…

Thank you :)

Let us know if you make something ;)

Re: Cameras and Lenses

#218

Post by kaitai »

mercer wrote: post #215
antonfire wrote: post #209

Earlier quoted context omitted.

Alright, I'm pretty burned out on this conversation so this is gonna be my last post. It's been distracting me and I want my real life back. I'll just try to wrap up the bits I find interesting. > But if you mean, would I spot Blair if I didn't know them? That's more or less what I mean, but also, would you, on top of that, expect me to spot the same thing? > Do you think this means I'm reading their gender expressio…

> Alright, I'm pretty burned out on this conversation so this is gonna be my last post. I sometimes try to have proper conversation, but these days try to make sure I'm not dealing with some form of alt-right bandwagon trolling by checking comment histories. Every single HexagonalKitten comment so far has been about how others get all upset about things, and, of course, 'immigration issues'. It's not that I have an i…

This is a useful comment -- this is the sort of total derail that hijacks a discussion of (scrolls up) oh right, cameras and lenses, color filters, how we (hehe) filter the world to 'master the art of recording what we see'.

It's good to know when you're conversing with people who prefer fires that don't shed light.

Re: Cameras and Lenses

#219

Post by dang »

kepler1 wrote: post #20

The site is the work of a guy, "him", and "his" work. We don't have to guess and say "them" and "their" work.

"Eschew flamebait. Don't introduce flamewar topics unless you have something genuinely new to say. Avoid unrelated controversies and generic tangents."

https://news.ycombinator.com/newsguidelines.html

We detached this subthread from https://news.ycombinator.com/item?id=25371653.

Re: Cameras and Lenses

#220

Post by dang »

h_spacer wrote: post #78
echelon wrote: post #75

Earlier quoted context omitted.

I'm still going to use they/them because a name doesn't necessarily match with one's gender.

Sorry to hear that you hold other cultures in such low regard.

If you keep posting flamewar comments to HN we will have to ban you, so please don't do that. We're trying for something else here.

https://news.ycombinator.com/newsguidelines.html

Post reply on HN