Design and evaluation of controls for drift, video gain, and color balance in spaceborne facsimile cameras
by Stephen J. Katzberg ... [et al.].

Description

Main Author

Katzberg, S. J. (Stephen J.)

Related Names

Burcher, Ernest E.
Rowland, Carroll W.
Kelly, W. Lane.
United States. National Aeronautics and Space Administration.
Langley Research Center.

Language(s)

English

Published

Washington, D.C. : National Aeronautics and Space Administration ; 1973.

Subjects

Imaging systems > Imaging systems / Automatic control.
Space vehicles > Space vehicles / Optical equipment > Space vehicles / Optical equipment / Automatic control.

Summary

The facsimile camera is an optical-mechanical scanning device which has become an attractive candidate as an imaging system for planetary landers and rovers. This paper presents electronic techniques which permit the acquisition and reconstruction of high quality images with this device, even under varying lighting conditions. These techniques include a control for low frequency noise and drift, an automatic gain control, a pulse-duration light modulation scheme, and a relative spectral gain control. Taken together, these techniques allow the reconstruction of radiometrically accurate and properly balanced color images from facsimile camera video data. These techniques have been incorporated into a facsimile camera and reproduction system, and experimental results are presented for each technique and for the complete system.

Note

Prepared at Langley Research Center.
Cover title.

Physical Description

iii, 29 p. : ill. (1 col.) ; 27 cm.

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