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

Metadata Updated: November 12, 2020

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: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Maintainer
Identifier TECHPORT_87042
Data First Published 2016-03-01
Data Last Modified 2020-01-29
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
Homepage URL https://techport.nasa.gov/view/87042
Program Code 026:027
Source Datajson Identifier True
Source Hash 8222bcd566e68dc52bae371e7ca2d11f4c04b611
Source Schema Version 1.1

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