Scanning Cursor Techniques.
Abstract
This report describes the effort to design, fabricate and test a digitizing cursor with integral line centering capability. The resultant cursor is transmissive in nature utilizing a linear photodiode array, an optical system and array signal processing electronics. Processor output is a binary count representing position of the image traced feature on the array. A computer algorithm uses the information as a corrective term to yield accurate coordinate data. Computer-generated rotational commands serve to continuously position the array to be orthogonal to the feature to ensure maximum accuracy in tracing features containing curvatures or forming closed contours. Accuracy of + or - .003 inch is obtainable in digitizing with the cursor. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1976
- Accession Number
- ADA034599
Entities
People
- G. W. Hunka