Determination of the atmospheric point spread function by a parameter search

dc.contributor.author	Krishnakumar, V
dc.contributor.author	Venkatakrishnan, P
dc.date.accessioned	2008-08-18T11:28:46Z
dc.date.available	2008-08-18T11:28:46Z
dc.date.issued	1997-12
dc.identifier.citation	Astronomy and Astrophysics Supplement Series, Vol. 126, No. 1, pp. 177 - 181	en
dc.identifier.issn	0365-0138
dc.identifier.uri	http://hdl.handle.net/2248/3195
dc.description.abstract	The result of blind deconvolution is a reconstructed image that has non positive intensities. The number of these non positive pixels has been used as an estimator for the departure from a perfect reconstruction. Simulations of reconstruction of objects convolved with a kernel having one or two parameters are shown to demonstrate the efficiency of the estimator. We thus present a technique of determining the unknown parameters of the point spread function by searching for the point in parameter space with the lowest number of nonpositive pixels. It is also shown that the parameters of the convolving kernel can be obtained even in the presence of noise. This method was validated using a long exposure image of NGC 1409.	en
dc.format.extent	231339 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en	en
dc.publisher	European Southern Observatory	en
dc.relation.uri	http://dx.doi.org/10.1051/aas:1997259	en
dc.subject	Techniques: Image Processing	en
dc.subject	Atmospheric Effects	en
dc.subject	Globular Clusters: NGC 1409	en
dc.title	Determination of the atmospheric point spread function by a parameter search	en
dc.type	Article	en