FlatCam prototype eliminates lens using pinhole-like sensor mask
A team of researchers at Rice University are developing a thin, lensless camera called FlatCam, which replaces the traditional lens with a grid-like coded mask essentially made of multiple pinholes positioned directly over the sensor. From there, raw data from the camera - which looks nothing like an actual image - is sent to a computer where an algorithm demultiplexes the raw sensor measurements to reconstruct a photo.
FlatCam was developed by Richard Baraniuk and Ashok Veeraraghavan, and while it isn’t likely to replace traditional cameras, FlatCam could find use in a variety of applications where present imaging technology isn’t suitable. Due to its lensless design, FlatCam is thinner than a dime and can be 'fabricated like microchips,' decreasing costs.
Offering an example of possible future applications, Baraniuk explained, 'We can make curved cameras, or wallpaper that’s actually a camera. You can have a camera on your credit card or a camera in an ultrathin tablet computer.' The team's paper details more potential applications, including surveillance, foldable cameras and wearable devices. They've even created a couple of video clips using the prototype camera.
In its present form, FlatCam produces 512 x 512 pixel images; however, the team expects better algorithms and improved manufacturing will one day result in higher resolutions. One of the salient issues mentioned in the paper surrounds noise: a linear demultiplexing system invariably adds noise from all the mathematical operations, with higher spatial frequencies experiencing even more 'noise amplification' that ultimately limits resolving ability. These are issues the researchers are actively working on.
The researchers recently talked about FlatCam on NPR's All Things Considered; the episode can be streamed here.
Via: Rice University
Aug 24, 2017
Aug 21, 2017
Equivalence is useful if you have any interest in light (and as a photographer, you probably should)
Aug 23, 2017
Aug 3, 2017
|2014_1211_140657AA by old shutter bugger|
from The Bride
|Overloaded by NZ Scott|
from Your City - Delivery Boy
|Petals by Flor Tempra|
from Petal Portraits
|Barley by Will B Milner|
|APPLE & ROACH by TX Photo Doc|
from Delicious - Unpalatable
Take a quick tour of Nikon's new D850 in our 'First Look' video and find out what makes this new pro-level DSLR so exciting. Hint: a lot of things.
Nikon appears to have pulled out all the stops for its D850. It combines high resolution and speed: a full-frame 45.7MP BSI CMOS sensor capable of 7 fps bursts. The D5's 153-point AF system, a tilting touchscreen and 4K/24p video are also on board. It arrives in September for $3300.
The Nikon D850 is a 45.7MP full-frame DSLR that can shoot at seven frames per second. Supporting this is an autofocus system lifted wholesale from the company's pro-sports D5 model. Add in a bigger viewfinder and full-width 4K capture and you've got a lot more than a warmed-up D810.
Cinema equipment powerhouse Arri has introduced a new line of full spectrum neutral density filters that drawn on its years of experience creating internal filtration systems for its ALEXA Mini and the AMIRA movie cameras.
The 'pocket powerhouse' Godox Wistro AD200 flash just got a new accessory. Now, you can swap out the speedlight or bare bulb heads for a 3.6-watt LED lamp.
Photographers Andrew Studer and Ted Hesser captured some of the most iconic images of this week's eclipse, showing a climber standing in the middle of the glowing corona. This is the story behind those images.
Intrigued by those ultra-cheap, fast lenses coming out of China? This video review of the $550 Sainsonic Kamlan 55mm F1.2 lens points out some of the performance you sacrifice to save an almighty dollar (or $800).
Canon has expanded its PIXMA TS-series Wireless Inkjet printer lineup with five new models, two of which contain an improved ink system that adds a sixth color ('Photo Blue') to help reduce graininess and improving overall quality.
Oprema Jena is on a roll. After a wildly successful Kickstarter to bring back the legendary Zeiss Biotar 75mm F1.5 lens, the company is sweetening the pot by resurrecting the Biotar 58mm F2 as well.
Nikon has issued a delay and apology regarding their 100th Anniversary D5, D500, and Triple Lens sets. Due to a logo issue, the company is being forced to delay shipments until October.
Yet another reason to always shoot Raw. These two shots are actually the same photo, photographer Dan Plucinski simply pulled up the shadows in post.
The Galaxy Note 8 is the first Samsung smartphone to feature a dual-cam setup. The 2x tele lens allows for a background-blurring portrait mode and comes with optical image stabilization.
Cloud backup service CrashPlan has announced that it will permanently shutter it's "for home" service by the end of October. If you use CrashPlan to back up your photos, you'll want to find an alternative ASAP.
Equivalence is much-discussed, but still often misunderstood. Here's a simplified explanation of the concept of equivalent apertures, which is just another way of talking about light received by your camera.
Try your hand at this blind portrait shootout between the Canon 1DX Mark II, Nikon D5 and Sony a9. With all bias removed, you might just rank your favorite camera brand worst.
Photo sharing site 500px has just added support for wide-gamut color profiles such as AdobeRGB and ProPhotoRGB, even allowing users to filter their searches by color profile.
DJI just released a mandatory firmware update for the DJI Spark. If you own a Spark and don't update your firmware by September 1st, DJI will remotely ground your drone.
Affordable flash manufacturer Godox has updated its smartphone app so that it can be used to control all of its wireless X flash units, not just the A1 smartphone flash.
Western Digital's new My Book Duo external desktop storage system offers up to 20TB of storage capacity, and comes with RAID-optimized WD Red hard drives.
Version 1.04 of the Sony a6500 firmware can be downloaded from the Sony Support website now.
Not sure how to choose your first drone? In this article, the second of a 3-part series, we discuss what factors you should consider when deciding what drone is right for you.
NASA photo editor Joel Kowsky didn't just capture the solar eclipse from his vantage point in Wyoming, he also managed to capture the ISS buzzing across what remained of the sun.
In these videos, talented photographer and filmmaker Daniel DeArco breaks down several tips that will help flash photography newbies start experimenting with artificial light.
Photographer and master potter Steve Irvine makes incredibly intricate, functional ceramic pinhole cameras that look like robots and monsters.
Chinese gimbal manufacturer Gudsen has released a firmware update for its Moza Air that lets you control the direction and angle of the head remotely just by moving a small handlebar-mounted control unit.
Curious how the Sony a9 performs underwater? Our friends at Backscatter took the camera diving off the Baja California coast, to find out how it handled shooting great white sharks.
While most of the DPReview crew put away our cameras and just watched the celestial event, Rishi decided last-minute to hack together a rig and capture a few shots.
Defunct Russian camera maker Zenit is making a comeback, and they're planning to release a full-frame mirrorless camera in 2018.
The days where you're more or less locked into premium or first-party flash units has gone. They're less than $50 now, so there's one less excuse not to get one. Here's our case for adding one to your kit, and a few pointers to get you going.
If you're shooting the solar eclipse here's a hint: don't fry your camera's sensor. Use a proper solar filter that offers at least 16 stops of light filtration, along with UV and IR filtering. More important? Don't look at it unless you've got solar filters. Sensors can be replaced, your retinas can't.