The Nyquist criterion in CCD photometry for surface brightness

Details The Nyquist criterion in CCD photometry for surface brightness The Nyquist criterion in CCD photometry for surface brightness

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasp..104..285w&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 104, no. 674, April 1992, p. 285-289.

Astronomy and Astrophysics

Astronomy

2

Astronomical Photometry, Brightness Distribution, Charge Coupled Devices, Image Processing, Nyquist Frequencies, Fourier Transformation, Fraunhofer Lines, Instrument Errors, Pixels, Transfer Functions

Scientific paper

Astronomers routinely violate the directive to sample surface brightness with at least twice the frequency of the highest spatial frequency of the Fourier transform of the continuous image, when doing direct CCD imaging. It is reasonably speculated that this practice is rationalized on the basis that the CCD does not actually sample the surface brightness at periodic intervals, but instead integrates the surface brightness over contiguous regions (the CCD pixels). It is herein derived that this mode of sampling changes the form of aliasing error, but the aliasing error is nevertheless present when undersampling occurs. The very nature of the error betrays the possibility of detecting its presence, a priori.

Affiliated with

Also associated with

No associations

Rating

The Nyquist criterion in CCD photometry for surface brightness does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Nyquist criterion in CCD photometry for surface brightness, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Nyquist criterion in CCD photometry for surface brightness will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1739639