Multicamera High Dynamic Range High-Speed Video of Rocket Engine Tests and Launches

Metadata Updated: February 28, 2019

High-speed video recording of rocket engine tests has several challenges. The scenes that are imaged have both bright and dark regions associated with plume emission (bright) and solid bodies (dark and bright) that are visible because light from other sources reflects off them. Recent advances in High Dynamic Range (HDR) technologies can address the challenges of acquiring high-quality rocket engine test imagery in a convenient, safe and effective manner. This project extends techniques developed in a previous project to develop a high-speed, color, extreme HDR video imaging capability with four boresighted HD video cameras appropriate for imaging targets several to many meters from the camera system.High-speed video cameras do not have sufficient dynamic range to properly expose both bright and dark regions that occur during rocket engine testing without partial saturation due to the limited bits (typically 8-10) available. HDR imaging is a technique that uses two or more exposures of the same scene combined with processing to fuse the different exposures into a single image that can display the entire dynamic range of the scene. For this project a prototype multicamera HDR imaging system was designed and constructed, and included a custom camera mount. The cameras were integrated into a imaging platform, camera calibration was performed, and a custom software workflow to fuse raw Bayer array imagery into color HDR imagery was developed. The technique was successfully used on a Hybrid Desktop Demonstration Unit and other targets of opportunity.A high-speed, color, extreme HDR video imaging capability that can be used to monitor high energy engine tests from distances up to many meters away was developed. HDR imaging is a technique that uses two or more exposures of the same scene that, combined with processing, fuses the different exposures into a single image that can display the entire dynamic range of the scene without saturation. This project combined multiple streams of HD video using computational photography and computer vision techniques to produce a cutting edge, color, extreme HDR recording capability.

Access & Use Information

Public: This dataset is intended for public access and use. License: U.S. Government Work

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Dates

Metadata Created Date August 1, 2018
Metadata Updated Date February 28, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date February 28, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_87042
Maintainer
TECHPORT SUPPORT
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id a246448f-4a31-435f-8f9f-84dd12c19566
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2016-03-01
Homepage URL https://techport.nasa.gov/view/87042
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash e879077c51191792fc346c92fe93e958182aed05
Source Schema Version 1.1

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