Numerical analysis of photographs of the Martian surface transmitted by Mars-4 and Mars-5

Details Numerical analysis of photographs of the Martian surface transmitted by Mars-4 and Mars-5 Numerical analysis of photographs of the Martian surface transmitted by Mars-4 and Mars-5

Nov 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975kosis..13..898b&link_type=abstract

Kosmicheskie Issledovaniia, vol. 13, Nov.-Dec. 1975, p. 898-906. In Russian.

Computer Science

Graphics

Digital Spacecraft Television, Mars Surface, Mars 5 Spacecraft, Optical Data Processing, Spaceborne Photography, Computer Graphics, Digital Filters, Image Enhancement, Linear Filters, Photogrammetry, Video Data

Scientific paper

Photographs of the Martian surface transmitted by Mars-4 and Mars-5 are presented, and the programs and algorithms used in the first level of processing are outlined. The images are processed by a specialized digital complex, the software of which falls into four categories: overall programs; programs for editing and storage of data blocks on magnetic disks and tape; programs for the control of specialized external apparatuses for input-output and visualization of the images; programs for refining the images. Refining programs are constructed such that continuous visual monitoring of their progress is possible. After the original video record is edited, reference points are identified and removed. Nonhomogeneities in the background are removed by linear two-dimensional filtration. Further filtration eliminates pulse noise and maculas. The reference points are replaced, the difference image is formulated by sections, and the images are recorded on magnetic tape. Enhancement of contrast and photoregistration complete the first level of processing.

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