Imaging

Homography Warp Image FPGA Implementation

NASA’s Jet Propulsion Laboratory, Pasadena, California A landing system for Mars matches features seen in descent imagery against a map constructed from orbital imagery. The spacecraft attitude and altitude are known, but lateral position is known only poorly. From attitude and altitude, one can generate a mapping (homography) that allows the descent image to be warped into the orthonormal viewpoint of the map. The homography maps any pixel in the map image to the corresponding pixel in the descent image.

Posted in: Briefs

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Improved Hall Thrusters Fed by Solid Phase Propellant

Mg is more abundant than Xe and provides a much higher specific impulse. John H. Glenn Research Center, Cleveland, Ohio Hall thrusters normally use Xe propellant, which is expensive and scarce in the solar system. The weight of Xe is such that typical Hall thrusters are limited in specific impulse to approximately 3,000 s. The objective of this program was to improve and demonstrate Mg Hall thruster systems. Mg is abundant in the solar system and has an atomic mass approximately one-fifth that of Xe, which means much higher specific impulse is achieved than with Xe at typical thruster operating conditions (power, voltage).

Posted in: Briefs, TSP

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The Sun’s Surface in Stunning Detail

Located on the Canary Island of La Palma, the Swedish 1-meter Solar Telescope (SST) is the world’s leading facility for high resolution observations of the Sun. It is operated by the Institute for Solar Physics (ISF), which is part of Stockholm University’s department for Astrophysics. Research at the institute primarily aims to gain knowledge about the outer layer of the solar atmosphere, which is dominated by magnetic fields. How do magnetic fields arise? How are they formed and ultimately destroyed or removed from the solar surface? How do they affect the Sun‘s outer atmosphere? How do they give rise to solar storms and the radiant energy that the Sun emits?

Posted in: White Papers

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Researcher Spotlight: Imaging Software Improves Video Monitoring of Vital Signs

By detecting nearly imperceptible changes in skin color, emerging imaging technologies have been able to extract pulse rate, breathing rate, and other vital signs from a person facing a camera. The videography tools have struggled, however, to compensate for low light conditions, dark skin tones, and movement.

Posted in: Articles, Briefs

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High Dynamic Range Imaging (HDRI) Upgrades Inspection Results

HDRI features capture details when the environment, or the objects themselves, are both bright and dark. Designers and operators of automated inspection systems have long been challenged with completing accurate inspections when those tasks required high dynamic range, or when there was a need to capture critical details in objects or environments with high contrast between their brightest and darkest areas.

Posted in: Articles, Briefs

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Advanced Holography Offers 3D Fire Measurements

In a propellant fire, large molten aluminum drops form at the burning surface. The drops are lofted into the environment and can severely damage anything that they fall on. Liquid breakup must be understood to predict the scale and intensity of such fires.

Posted in: Application Briefs, Briefs

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Cameras Provide Critical Data for NASA Rocket’s First Flight

On March 11, NASA tested the powerful five-segment booster for NASA’s new rocket, the Space Launch System. To provide critical data for the rocket’s first flight, eight cameras with more than 40 different settings — including varying exposures — were set up near the forward portion of the booster. During the two-minute test, the cameras were computer-controlled and cycled through pre-programmed settings.

Posted in: Application Briefs, Briefs

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Ultra-Slow Motion Video for New-Product Designers: Seeing the Unseen During the Testing Phase

Join Frank Mazella, Learning Products Manager, from Vision Research as he provides some insight on utilizing slow motion imaging, with real-world examples and simple techniques, product design engineers can incorporate into the design process, testing for reliability, robustness, and real-life behavior that can determine a product’s success in the market place.

Posted in: On-Demand Webinars

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New Method Generates High-Resolution, Moving Holograms in 3D

The 3D effect produced by stereoscopic glasses used to watch movies cannot provide perfect depth cues. Furthermore, it is not possible to move one’s head and observe that objects appear different from different angles — a real-life effect known as motion parallax. Researchers have developed a new way of generating high-resolution, full-color, 3D videos that uses holographic technology. Holograms are considered to be truly 3D, because they allow the viewer to see different perspectives of a reconstructed 3D object from different angles and locations. Holograms are created using lasers, which can produce the complex light interference patterns, including spatial data, required to re-create a complete 3D object. To enhance the resolution of holographic videos, researchers used an array of spatial light modulators (SLMs). SLMs are used to display hologram pixels and create 3D objects by light diffraction. Each SLM can display up to 1.89 billion hologram pixels every second. Source:

Posted in: News, Video

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NGDCS Linux Application for Imaging-Spectrometer Data Acquisition and Display

NASA’s Jet Propulsion Laboratory, Pasadena, California A simple method of controlling recording and display of imaging spectrometer data in (airborne) flight was needed. Existing commercial packages were overly complicated, and sometimes difficult to operate in a bouncing plane. The software also was required to keep up with the imaging data rate, while still running on commodity hardware and a desktop operating system. Finally, the software needed to be as robust as possible — repeating a flight because of lost data is sometimes impossible, and always expensive.

Posted in: Briefs, Displays/Monitors/HMIs, Data Acquisition

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