Video digitizer (real time-frame grabber) with region of interest suitable for quantitative data analysis used on the infrared and H alpha cameras installed on the DIII-D experiment

Conference · Wed Oct 07 04:00:00 EDT 1987

OSTI ID:7020679

Ferguson, S W; Kevan, D K; Hill, D N; Allen, S L

This paper describes a CAMAC based video digitizer with region of interest (ROI) capability that was designed for use with the infrared and H alpha cameras installed by Lawrence Livermore Laboratory on the DIII-D experiment at G.A. Technologies in San Diego, California. The video digitizer uses a custom built CAMAC video synchronizer module to clock data into a CAMAC transient recorder on a line-by-line basis starting at the beginning of a field. The number of fields that are recorded is limited only by the available transient recorder memory. In order to conserve memory, the CAMAC video synchronizer module provides for the alternative selection of a specific region of interest in each successive field to be recorded. Memory conservation can be optimized by specifying lines in the field, start time, stop time, and the number of data samples per line. This video frame grabber has proved versatile for capturing video in such diverse applications as recording video fields from a video tape recorder played in slow motion or recording video fields in real time during a DIII-D shot. In other cases, one or more lines of video are recorded per frame to give a cross sectional slice of the plasma. Since all of the data in the digitizer memory is synchronized to video fields and lines, the data can be read directly into the control computer in the proper matrix format to facilitate rapid processing, display, and permanent storage. 8 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7020679
• Report Number(s): UCRL-96670; CONF-871007-96; ON: DE88011327
• Country of Publication: United States
• Language: English

Related Subjects

440300 -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ALPHA PARTICLES
ANALOG-TO-DIGITAL CONVERTERS
CAMAC SYSTEM
CAMERAS
CHARGED PARTICLES
CLOSED PLASMA DEVICES
DATA ANALYSIS
DATA PROCESSING
DIGITIZERS
DOUBLET-3 DEVICE
ELECTROMAGNETIC RADIATION
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
IMAGE PROCESSING
IMAGE SCANNERS
IMAGES
INFRARED RADIATION
MAGNETIC STORAGE DEVICES
MAGNETIC TAPES
MEMORY DEVICES
PLASMA
PLASMA DIAGNOSTICS
PROCESSING
PULSE CIRCUITS
RADIATIONS
REMOTE VIEWING EQUIPMENT
SIGNAL CONDITIONERS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
VIDEO TAPES