Stereo Image Digitizer For An Automatic Feature Extraction System

James O. Abshier; Lawrence J. Meyers

doi:10.1117/12.958079

12 February 1980 Stereo Image Digitizer For An Automatic Feature Extraction System

James O. Abshier, Lawrence J. Meyers

Proceedings Volume 0200, Laser Recording and Information Handling; (1980) https://doi.org/10.1117/12.958079
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

Abstract

A flexible image digitizing system is under development to provide for digitization of stereo photographs and graphic materials in an automatic feature extraction system. The digitizing system employs two servo-controlled photograph stages and linear CCD array cameras to scan stereo photographs for image digitization. Raster scanning is accomplished by moving the photograph in a direction approximately normal to the array while reading out successive lines of video from the array. The photograph scanner optics contain zoom magnification and rotation capabilities, providing variable resolution and an ability to correct first order geometric image distortions. Graphic input materials are scanned by a separate line array camera mounted on the plotting head of an XY plotter. The digitizer system employs a hardware digital video processing unit to correct for dark signal and gain variations of the linear arrays. This processor also corrects for geometric distortions of the lens systems and arrays. Control of the overall system is implemented with a minicomputer, which provides scanning, data transfer, calibration, and setup functions of the system. Peripherals of the minicomputer include a large dual access disk storage unit for image data storage and transfer to the main computer of the automatic feature extraction system.

Citation Download Citation

James O. Abshier and Lawrence J. Meyers "Stereo Image Digitizer For An Automatic Feature Extraction System", Proc. SPIE 0200, Laser Recording and Information Handling, (12 February 1980); https://doi.org/10.1117/12.958079

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available