Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
08-19-2015, 03:06 AM   #1
Site Supporter
Site Supporter
geomez's Avatar

Join Date: Mar 2013
Location: Preskitt Arizona
Photos: Gallery
Posts: 1,756
Newly developed camera makes overexposure impossible

MIT Created a Camera That Will Never Overexpose a Photograph

My first thought when I saw this was "Wow, that's cool!".
My second thought was, "Once more a new technology is chipping away at the skills needed to make properly exposed photographs".

08-19-2015, 03:12 AM   #2
Site Supporter
Site Supporter




Join Date: Mar 2009
Location: Gladys, Virginia
Photos: Gallery
Posts: 17,867
I'm impressed by the amount of purple fringing in some of those photos. I guess if you don't over expose you don't have to worry about PF.
08-19-2015, 03:23 AM   #3
Pentaxian




Join Date: Jan 2012
Location: Slovenia
Photos: Gallery
Posts: 2,184
QuoteOriginally posted by Rondec Quote
I'm impressed by the amount of purple fringing in some of those photos. I guess if you don't over expose you don't have to worry about PF.
I'm pretty sure PF isn't a consideration at this point in development.
08-19-2015, 03:32 AM   #4
Site Supporter
Site Supporter




Join Date: Mar 2009
Location: Gladys, Virginia
Photos: Gallery
Posts: 17,867
QuoteOriginally posted by Giklab Quote
I'm pretty sure PF isn't a consideration at this point in development.
I was being facetious. I guess I would say that this sort of thing probably works decently at low iso, but not sure how well it works as your iso goes up.

08-19-2015, 03:45 AM   #5
Pentaxian




Join Date: Feb 2015
Photos: Albums
Posts: 4,290
Yep , that's a good concept, the challenge is regarding the integration of the local pixel control logic, perhaps this could soon be implemented in large sensors allowing more per pixel space. Not so easy with high resolution sensors. On small chip, it could already be possible with 3D TSV (Through Silicon Vias) to stack a nearly conventional imager with added control logic onto another silicon layer stacked at the back of the sensor. If this become a reality implemented in a few years from now, this would revolutionize digital cameras by eventually getting image properties similar to what was with film.
08-19-2015, 04:55 AM   #6
Site Supporter
Site Supporter
savoche's Avatar

Join Date: Jun 2011
Location: Lowlands of Norway
Posts: 10,740
No more need for ND filters for long exposures

It will be interesting to see what kind of noise level they get out of this thing. With sufficient low-noise sensitivity it would mean getting closer to true ISO-lessness. Just pick the DoF and shutterspeed you want and forget about exposure values.

I mean, if Sony made, say, a 12MP sensor for the 645Z today it would be very hard to underexpose so severely you can't recover it. Add this tech and you can recover almost anything without too much noise.

...or we're looking at yet another interesting concept that never took off.
08-19-2015, 05:31 AM   #7
Site Supporter
Site Supporter
savoche's Avatar

Join Date: Jun 2011
Location: Lowlands of Norway
Posts: 10,740
QuoteOriginally posted by dcshooter Quote
Of course, after taking their "perfectly" exposed photos, half of the users will run the resulting images through their favorite "contrast" preset and blow the highlights right back out....


True.

That said, a "perfect" exposure is not necessarily the exposure you want. I suppose this would just move even more of the job from in-camera to the post processing.
08-19-2015, 05:39 AM   #8
Pentaxian
mcgregni's Avatar

Join Date: Sep 2012
Location: Surrey, England
Posts: 2,214
Intelligent exposure control is surely best left to the photographer, who is the only person able to judge the DR properties of each scene in relation to the cameras IQ and his/her processing intentions and capabilities.

Neither software implemented highlight control nor 'ETTL' approaches are conducive to getting the best IQ out of a sensor, and this technology must surely involve one or both .... ?

08-19-2015, 06:11 AM   #9
Pentaxian
Site Supporter
normhead's Avatar

Join Date: Jun 2007
Location: Near Algonquin Park
Photos: Gallery | Albums
Posts: 28,915
QuoteOriginally posted by dcshooter Quote
Of course, after taking their "perfectly" exposed photos, half of the users will run the resulting images through their favorite "contrast" preset and blow the highlights right back out....
I guess you've never heard of highlights?
08-19-2015, 06:15 AM   #10
Pentaxian




Join Date: Dec 2010
Location: Ontario
Photos: Gallery
Posts: 2,871
It's maybe worth point out that according to the video the photos in the article aren't from an actual working model, they're simulations of how this will work. The working model looks to be only B&W at the moment.

Pretty cool idea.
08-19-2015, 06:27 AM   #11
Pentaxian
amoringello's Avatar

Join Date: May 2008
Location: Virginia, USA
Photos: Gallery
Posts: 1,511
I'm sure there is more voodoo in the background but simply keeping track of how many times the "buckets" get emptied is the same as simply adding bits to the stored data.
i.e. 16 bit raw instead of 12,. I suppose creating high bit-depth sensor data is perhaps currently more difficult than using a clear+count algorithm on lesser technology?
08-19-2015, 06:47 AM   #12
Pentaxian




Join Date: Oct 2011
Location: Savannah, GA
Posts: 5,129
Been waiting for this inevitable innovation. Nothing new about the idea, just waiting for the tech to get there. And it won't destroy photography (or pro photography) -- it will actually just get us back to where we were with negative film, which is pretty tough to overexpose with any normal exposure time (you just have to burn that area in to get the detail).
08-19-2015, 06:49 AM   #13
Pentaxian




Join Date: Dec 2010
Location: Ontario
Photos: Gallery
Posts: 2,871
QuoteOriginally posted by amoringello Quote
I'm sure there is more voodoo in the background but simply keeping track of how many times the "buckets" get emptied is the same as simply adding bits to the stored data.
i.e. 16 bit raw instead of 12,. I suppose creating high bit-depth sensor data is perhaps currently more difficult than using a clear+count algorithm on lesser technology?
They're not counting the number of times the pixel overflows. If they did, the name "Modulo Camera" would make little sense. The problem in reconstructing the image is how to determine the number of times an individual pixel has overflowed. If you wonder how is this ever possible, think of the simple case where you have a big area of pixels that showed as nearly saturated, with a handful of pixels in the middle that showed just about empty. It would be a safe bet that these nearly empty pixels had flipped.

Of course it will never be so obvious. They have more details on how you could achieve this in their technical paper found here:

Unbounded High Dynamic Range Photography using a Modulo Camera - Hang Zhao - MIT Media Lab
08-19-2015, 07:47 AM   #14
Site Supporter
Site Supporter




Join Date: Jan 2010
Location: Michigan
Photos: Gallery
Posts: 2,206
Yes as I understand it, they don't care (or don't record) how many times each well was reset.
Instead thay do spatial signal processing to reconstruct the most likely array levels in X and Y
08-19-2015, 07:58 AM   #15
Pentaxian
ChristianRock's Avatar

Join Date: Jul 2013
Location: Woodstock, GA
Photos: Gallery | Albums
Posts: 5,176
I like the idea and I've always wondered if something like this could be done.

I think there might be other possible solutions that could work even better.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, camera makes overexposure, cameras, dr, image, photo industry, photography, priority
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Hello from a Newly Registered Pentax *istDL Camera Owner with Issue cliffordapotter170 Welcomes and Introductions 4 09-05-2013 05:25 AM
Images leak out of Pentax NC mirrorless camera system, makes us long for summertime i83N Pentax News and Rumors 3 03-31-2011 05:12 PM
Awww now what? Streaks all over a newly developed roll pbo Film Processing, Scanning, and Darkroom 17 03-19-2011 01:14 AM
My newly acquired camera! LSPhotography Non-Pentax Cameras: Canon, Nikon, etc. 4 11-17-2010 05:07 PM
what makes a pro camera philmorley Pentax DSLR Discussion 36 09-18-2008 10:14 AM



All times are GMT -7. The time now is 05:41 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top