Accession Number:

ADA193650

Title:

Analysis of Edge Detection Techniques for Radiographic Image Measurement

Descriptive Note:

Final rept. Jan 1986-Nov 1987

Corporate Author:

ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN

Personal Author(s):

• Nasser, A. L.

Report Date:

1988-04-01

Pagination or Media Count:

37.0

Abstract:

Personnel at the Arnold Engineering Development Center AEDC routinely X-ray inspect solid rocket motors. From the visual inspection of these data, potentially dangerous situations have been avoided by preventing the test of damaged rocket motors. However, an objective like rocket nozzle erosion cannot be analyzed in a timely fashion because of the detailed inspection required per frame of videotape, and the number of frames for a typical rocket motor firing. The goal of this study was to evaluate computer image measurement techniques so a process like measurement of rocket motor nozzle throat erosion can be automated for timely analysis. After evaluation of several edge detection techniques, two procedures were found to be satisfactory for this task. This study has determined that radiographic images can be measured accurately to within 0.14 inches by timely computer analysis. Keywords Image analysis, Radiography, Edge detection, Solid rocket motors, Nozzle erosion.

Descriptors:

• *ROCKET NOZZLES
• *SOLID PROPELLANT ROCKET ENGINES
• *VISUAL INSPECTION
• COMPUTER APPLICATIONS
• COMPUTERS
• DETECTION
• EDGES
• EROSION
• FRAMES
• IGNITION
• IMAGE PROCESSING
• IMAGES
• MEASUREMENT
• METHODOLOGY
• NOZZLES
• RADIOGRAPHY
• ROCKET ENGINES
• TIME SERIES ANALYSIS
• VIDEO TAPES

Subject Categories:

• Test Facilities, Equipment and Methods
• Solid Propellant Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE