Figure 5.

Detection results at varying SNR levels (a) image at 45 dB SNR; (b) image at 30 dB SNR; (c) image at 15 dB SNR; (d) image at −10 dB SNR; (e) detection results of ${\theta }_x$ at 45 dB SNR; (f) detection results of ${\theta }_x$ at 30 dB SNR; (g) detection results of ${\theta }_x$ at 15 dB SNR; (h) detection results of ${\theta }_x$ at −10 dB SNR; (i) detection results of ${\theta }_y$ at 45 dB SNR; (j) detection results of ${\theta }_y$ at 30 dB SNR; (k) detection results of ${\theta }_y$ at 15 dB SNR; (l) detection results of ${\theta }_y$ at −10 dB SNR.