Title :
A novel technique for quasar recognition
Author :
Zhou, H. ; Luo, M.L.
Author_Institution :
Nat. Lab. of Pattern Recognition, Chinese Acad. of Sci., Beijing, China
Abstract :
We present a Hough transform (HT)-based technique for quasar recognition. The main purpose of quasar recognition is to identify redshifts. There are two main approaches to calculating redshifts. One is a direct way based on recognizing emission peaks firstly, the other is a statistical one. We apply HT, a statistical way to compute redshifts. In addition, we employ two post-processing techniques for HT: one uses a linear kernel to recover the weakened true peak in the accumulator array; the other is a voting technique to eliminate sharp false peaks. Moreover, we use a weighted HT to improve the recognition results further. Experimental results are satisfactory
Keywords :
Hough transforms; astronomy computing; pattern recognition; quasars; red shift; signal processing; spectral analysis; Hough transform; accumulator array; emission peaks; linear kernel; post-processing techniques; quasar recognition; redshifts; sharp false peak; statistical method; voting technique; weakened true peak; weighted HT; Automation; Kernel; Laboratories; Object detection; Observatories; Pattern recognition; Probes; Signal mapping; Stimulated emission; Voting;
Conference_Titel :
Signal Processing Proceedings, 1998. ICSP '98. 1998 Fourth International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-4325-5
DOI :
10.1109/ICOSP.1998.770152