IMAGE DENSITY GRADIENT ANALYSIS.
Abstract
The Image Density Gradient Analysis effort was concerned with (1) the determination of the accuracy and precision of the Perkin-Elmer Edge Gradient Analysis (EGA) technique, and (2) the modification of the EGA computer programs for use with the IBM 360 Model 30E computer. Two sets of special targets were prepared to check accuracy and precision. The first set contained edges with varying degrees of linear image motion and the second set contained an array of sinusoidal transmittance targets and a low contrast edge. The special targets were used to test the accuracy and precision of the EGA technique. The results showed that the technique was accurate and precise out to spatial frequencies of 200 cycles per millimeter. The linear motion targets were measured using the Mann Microanalyzer. The results showed that this instrument was accurate over the spatial frequency range of 0 to 100 cycles per millimeter. The EGA computer programs were modified and successfully tested on an IBM 360 Model 30E computer. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1968
- Accession Number
- AD0666937
Entities
People
- E. C. Yeadon
- John Kelly