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Overcoming light scattering: Single-pixel optical system uses compressive sensing to see deeper inside tissue

Overcoming light scattering: Single-pixel optical system uses compressive sensing to see deeper inside tissue | Through the Lens | Scoop.it

Optical imaging methods are rapidly becoming essential tools in biomedical science because they're noninvasive, fast, cost-efficient and pose no health risks since they don't use ionizing radiation. These methods could become even more valuable if researchers could find a way for optical light to penetrate all the way through the body's tissues. With today's technology, even passing through a fraction of an inch of skin is enough to scatter the light and scramble the image.

Now a team of researchers from Spain's Jaume I University (UJI) and the University of València has developed a single-pixel optical system based on compressive sensing that can overcome the fundamental limitations imposed by this scattering. The work was published today in The Optical Society's (OSA) open-access journal Optics Express.

 

"In the diagnostic realm within the past few years, we've witnessed the way optical imaging has helped clinicians detect and evaluate suspicious lesions," said Jesús Lancis, the paper's co-author and a researcher in the Photonics Research Group at UJI. "The elephant in the room, however, is the question of the short penetration depth of light within tissue compared to ultrasound or x-ray technologies. Current knowledge is insufficient for early detection of small lesions located deeper than a millimeter beneath the surface of the mucosa." "Our goal is to see deeper inside tissue," he added.


To achieve this, the team used an off-the-shelf digital micromirror array from a commercial video projector to create a set of microstructured light patterns that are sequentially superimposed onto a sample. They then measure the transmitted energy with a photodetector that can sense the presence or absence of light, but has no spatial resolution. Then they apply a signal processing technique called compressive sensing, which is used to compress large data files as they are measured. This allows them to reconstruct the image.

 

One of the most surprising aspects of the team's work is that they use essentially a single-pixel sensor to capture the images. While most people think that more pixels result in better image quality, there are some cases where this isn't true, Lancis said. In low-light imaging, for instance, it's better to integrate all available light into a single sensor. If the light is split into millions of pixels, each sensor receives a tiny fraction of light, creating noise and destroying the image.


Via Dr. Stefan Gruenwald
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At least a step in the other direction.

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Rescooped by Donald Schwartz from Photography Tips & Tutorials
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4 Creative Shutter Speed Effects

4 Creative Shutter Speed Effects | Through the Lens | Scoop.it
One of the most valuable tools on your camera is labelled S (or Tv if you are using Canon) and stands for Shutter Priority Mode. Turn to this mode, usually activated by a top dial or menu option, and you can experiment with slower or faster shutter speeds for some really cool, creative effects. The shutter speed governs how long the shutter stays open and how much light reaches the sensor, so ‘slow’ and ‘fast’ are relative terms here. A...

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MyPhotoSchool's curator insight, July 2, 12:32 AM

Want to be a more creative photographer? Try slowing your shutter speed. In this article we show your 4 Creative Shutter Speed Effects to take your photography to the next level.

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Create the Illusion of a Waist for Photos with Sue Bryce - YouTube

By simply making a few adjustments to a woman's posture and hands you can create a the illusion of a slim waist in photographs. http://cr8.lv/sllemwpyt Photo...
Donald Schwartz's insight:

Creating faux waste, no, not where your hips are, higher. And don't push your shoulders forward. Got it?

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How to Build Flats for a Film Set | FilmmakerIQ.com

How to Build Flats for a Film Set | FilmmakerIQ.com | Through the Lens | Scoop.it
Donald Schwartz's insight:

Apparently no everyone agrees with this design. I'm looking at the alternatives.

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Ten Reasons I'm passing on the Panasonic GH4 | planet5D DSLR video news and more!

Tests to compare the 2K focusing and High ISO performance of the Panasonic GH4 to the Canon 5DM3 and 70D.
Donald Schwartz's insight:

Throwing a little cool water on the GH4 bandwagon and for that matter on 4K. Come on everyone think about the back end post with this much data.

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Photographing Reflections: 3 Tips Plus Stunning Examples for Creative Inspiration

Photographing Reflections: 3 Tips Plus Stunning Examples for Creative Inspiration | Through the Lens | Scoop.it
Donald Schwartz's insight:

"Use available, natural light versus flash to maximize the moment. Natural light also prevents distracting flash spots. Depending on the situation, the f/stop may need to be lowered (to f/2.8) and/or ISO may need to be raised to increase the shutter speed when shooting in low light."

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Metadata: Uncover Your Photos’ Secrets | Photojojo

Metadata: Uncover Your Photos’ Secrets | Photojojo | Through the Lens | Scoop.it
Extra photos for bloggers: 1, 2, 3 Metadata is data about data. When it comes to photo metadata, that means it's data/facts/figures/info a
Donald Schwartz's insight:

Useful....

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Diffusion on a Budget: How to Get Soft, Pleasing Light with No Money « No Film School

Diffusion on a Budget: How to Get Soft, Pleasing Light with No Money « No Film School | Through the Lens | Scoop.it
Donald Schwartz's insight:

With the gear that these guys had they really didn't need to use household items, but what the heck.

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4 Simple Steps for Professional Stop Motion Light Painting

4 Simple Steps for Professional Stop Motion Light Painting | Through the Lens | Scoop.it
How to create stop motion animation, using stills with light painting. Learn the step by step process to mastering this special effect.
Donald Schwartz's insight:

Are we having fun yet?

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Light meter calibration revisited | Frank Doorhof

Light meter calibration revisited | Frank Doorhof | Through the Lens | Scoop.it
Donald Schwartz's insight:

The good news for me is: "Now in the past you had to buy the “expensive” Sekonic target, but since the new software they also support color checkers including the Color Checker Passport from X-rite which I use myself. And I can say that the calibration with the color checker passport went smooth and the result is accurate."

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Dramatic Scene Beats & Directing Film - Digital Film Farm Workshops

Dramatic Scene Beats & Directing Film - Digital Film Farm Workshops | Through the Lens | Scoop.it
Have you ever heard of “dramatic scene beats” sometime called “beats”? If you haven’t heard of them or used them, you’ll want to read on because these little things are packed full of power. In this post I’m going to help you understand: What constitutes a dramatic beat. How to identify and breakout beats. How to …
Donald Schwartz's insight:

Take a moment, no take several moments.

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Overcoming light scattering: Single-pixel optical system uses compressive sensing to see deeper inside tissue

Overcoming light scattering: Single-pixel optical system uses compressive sensing to see deeper inside tissue | Through the Lens | Scoop.it

Optical imaging methods are rapidly becoming essential tools in biomedical science because they're noninvasive, fast, cost-efficient and pose no health risks since they don't use ionizing radiation. These methods could become even more valuable if researchers could find a way for optical light to penetrate all the way through the body's tissues. With today's technology, even passing through a fraction of an inch of skin is enough to scatter the light and scramble the image.

Now a team of researchers from Spain's Jaume I University (UJI) and the University of València has developed a single-pixel optical system based on compressive sensing that can overcome the fundamental limitations imposed by this scattering. The work was published today in The Optical Society's (OSA) open-access journal Optics Express.

 

"In the diagnostic realm within the past few years, we've witnessed the way optical imaging has helped clinicians detect and evaluate suspicious lesions," said Jesús Lancis, the paper's co-author and a researcher in the Photonics Research Group at UJI. "The elephant in the room, however, is the question of the short penetration depth of light within tissue compared to ultrasound or x-ray technologies. Current knowledge is insufficient for early detection of small lesions located deeper than a millimeter beneath the surface of the mucosa." "Our goal is to see deeper inside tissue," he added.


To achieve this, the team used an off-the-shelf digital micromirror array from a commercial video projector to create a set of microstructured light patterns that are sequentially superimposed onto a sample. They then measure the transmitted energy with a photodetector that can sense the presence or absence of light, but has no spatial resolution. Then they apply a signal processing technique called compressive sensing, which is used to compress large data files as they are measured. This allows them to reconstruct the image.

 

One of the most surprising aspects of the team's work is that they use essentially a single-pixel sensor to capture the images. While most people think that more pixels result in better image quality, there are some cases where this isn't true, Lancis said. In low-light imaging, for instance, it's better to integrate all available light into a single sensor. If the light is split into millions of pixels, each sensor receives a tiny fraction of light, creating noise and destroying the image.


Via Dr. Stefan Gruenwald
Donald Schwartz's insight:

At least a step in the other direction.

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Defy’s New G12 Pro Kit: Everything You Need in a 3-Axis Gimbal Setup, All in One Place | planet5D DSLR video news and more!

The DEFY G12 Pro Kit is geared toward our pro level cinematographer using up to a 12 pound camera and lens combination.
Donald Schwartz's insight:

An alternative to the Movi with a bit more punch. Played with it a bit and the setup at least appears to be easier.

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Self-Portraits | Photographs by Jen Davis, Essay by Hannah Frieser | FlakPhoto.com

Self-Portraits | Photographs by Jen Davis, Essay by Hannah Frieser | FlakPhoto.com | Through the Lens | Scoop.it
Photographs by Jen Davis, Essay by Hannah Frieser
Donald Schwartz's insight:

Long before there were "Selfies" there were self-portraits.

 

"Davis still uses the camera as a tool to help her understand the world around her. A decade into this project, she finds that her body is changing. As in the past, she continues to photograph through every new circumstance and allows the camera to make sense of it all."

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Dynamic Lighting for Fashion Portraits with Zach Gray

Professional photography educator Zach Gray walks viewers step-by-step through a dramatic portrait series with the Westcott 26" Rapid Box Octa and two Rapid Box Strips. Zach discusses multiple...
Donald Schwartz's insight:
I'm so happy that Westcott gets a little attention.
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Bonnie Sandy's curator insight, August 11, 11:39 AM

Great  find Donald Schartz follow his scoop on video and images- through the lens

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Building V-Flats - Inside the Glamour Studio with Sue Bryce - YouTube

This workshop is available now! http://www.creativelive.com/courses/shoot-with-sue-bryce Women want to feel as beautiful as Sue Bryce makes them look in her ...
Donald Schwartz's insight:

She's always has something useful to say and this always a question since "V" flats are so in vogue these days.

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Framing Actors For Story Emotion - Digital Film Farm Workshops

Framing Actors For Story Emotion - Digital Film Farm Workshops | Through the Lens | Scoop.it
Your framing communicates emotion after you communicate framing.     I believe filmmaking is a team sport, so I’m assuming you are working with a small or large crew. On the best productions crew members have a copy of the the day’s shooting script and accompanying shot-list. This list will be used by department heads …
Donald Schwartz's insight:

Where the lines for the shots fall.

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Kodak to Keep Making Movie Film After Top Directors Push - NYC Production & Post News

Kodak to Keep Making Movie Film After Top Directors Push - NYC Production & Post News | Through the Lens | Scoop.it
The Wall Street Journal, on its online site, says that secret negotiations now made public detail a coalition of studios that are said to be close to a deal to keep Eastman Kodak in the business of making motion picture film. Reporter Ben Fritz  says that Kodak’s new chief executive Jeff Clarke will not make the decision …
Donald Schwartz's insight:

How the mighty hath fallen; it's a tragedy.

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Natasha Gudermane "Mademoiselles" - Paris Undressed"

Natasha Gudermane "Mademoiselles" - Paris Undressed" | Through the Lens | Scoop.it
"Mademoiselles" is an intimate exploration of Paris. Natasha Gudermane explains how she entered the homes of strangers and made them take off their clothes.
Donald Schwartz's insight:

Remarkably straight forward photography--no porcelain statues here.

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Free Battery adapt+F&V LED Video Light K4000 Bi-Color 3Light Kit [K4000S*3+F2BP*3+B6] - US$1,249.00

Free Battery adapt+F&V LED Video Light K4000 Bi-Color 3Light Kit [K4000S*3+F2BP*3+B6] - US$1,249.00 | Through the Lens | Scoop.it
Free Battery adapt+F&V LED Video Light K4000 Bi-Color 3Light Kit [K4000S*3+F2BP*3+B6] -   You will get 3pcs battery adapter  as gift   Description: A lightweight and portable studio solution, integrating our newest technology in synchronous lighting, expandability, and power LEDs. The perfect mobile studio lighting solution. Available in daylight and bi-color models. The new K4000S Bi-Color Studio Panel light sports 400 pure color power LEDs, offering 2490
Donald Schwartz's insight:

Sounds almost too good to be believed. If anyone has tried this stuff, please share with the rest of us.

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Video: Anatomy of a Scene | ‘A Most Wanted Man’

Video: Anatomy of a Scene | ‘A Most Wanted Man’ | Through the Lens | Scoop.it
Anton Corbijn narrates a sequence from his film featuring Philip Seymour Hoffman, Rachel McAdams and Grigoriy Dobrygin.
Donald Schwartz's insight:

Think along...delve into the process of motivated shooting and editing. Uhm...

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Glamour Photos Replace Selfies for Personal Branding

Glamour Photos Replace Selfies for Personal Branding | Through the Lens | Scoop.it
Professional photography comes to social media.
Donald Schwartz's insight:

...assuming the photo subject knows and appreciates the difference.

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Why Make Films - Fast & Furious - Digital Film Farm Workshops

Why Make Films - Fast & Furious - Digital Film Farm Workshops | Through the Lens | Scoop.it
Warning – If you’re first film must be  great don’t read this post. Instead, make sure you have a great script and find the money to hire an experienced producer, director and crew. This collection of knowledge and skill will allow you to skip past the mountain of mistakes most of us need to make before …
Donald Schwartz's insight:

The "D" grade film concept revealed.

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The Making of Iconic American Photographs

The Making of Iconic American Photographs | Through the Lens | Scoop.it
A new exhibition shows the process behind famous shots.
Donald Schwartz's insight:

Follow the grease pencil: the crops, the notes. Would you have made the same choice? Come on...jump in.

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BeSteady Camera Stabilizer - another 3-axis gimbal stabilizer ready to hit the market | planet5D DSLR video news and more!

It is a camera stabilizer based on an electronic system equipped with gyroscopic sensors and accelerometers, using the direct drive of three axis of rotation in the form of brushless direct-current motors.
Donald Schwartz's insight:

Yet, more competition for the Movi. Who will be left standing?

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Where Will Photography Be One Year From Now?

Where Will Photography Be One Year From Now? | Through the Lens | Scoop.it
The world of photography and video has evolved rapidly over the past few years. Where will it be a year from now?
Donald Schwartz's insight:

Why am not surprise that medium format is the new growth area?

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