Image processing of galaxy photographs

Abstract

view Abstract Citations (81) References (6) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Image processing of galaxy photographs. Arp, H. ; Lorre, J. Abstract New computer techniques for analyzing and processing photographic images of galaxies are presented, with interesting scientific findings gleaned from the processed photographic data. Discovery and enhancement of very faint and low-contrast nebulous features, improved resolution of near-limit detail in nebulous and stellar images, and relative colors of a group of nebulosities in the field are attained by the methods. Digital algorithms, nonlinear pattern-recognition filters, linear convolution filters, plate averaging and contrast enhancement techniques, and an atmospheric deconvolution technique are described. New detail is revealed in images of NGC 7331, Stephan's Quintet, Seyfert's Sextet, and the jet in M87, via processes of addition of plates, star removal, contrast enhancement, standard deviation filtering, and computer ratioing to bring out qualitative color differences. Publication: The Astrophysical Journal Pub Date: November 1976 DOI: 10.1086/154802 Bibcode: 1976ApJ...210...58A Keywords: Astronomical Photography; Computer Techniques; Galactic Clusters; Galactic Structure; Image Enhancement; Photographic Processing; Color Photography; Data Processing; High Pass Filters; Image Contrast; Intergalactic Media; Pattern Recognition; Standard Deviation; Astronomy full text sources ADS | data products SIMBAD (12) NED (7)