Image Processing Reference
In-Depth Information
fractional SAR systems characterized by the PSF of a Gaussian "bell" shape in both
directions of the 2-D scene (in particular, of 16 pixel width at 0.5 from its maximum for the
1K-by-1K BMP pixel-formatted scene). The images are stored and loaded from a compact
flash device for the image enhancement process, i.e., particularly for the RSF and RASF
techniques. The initial test scene is displayed in Fig. 4(a). Fig. 4(b) presents the same original
image but degraded with the matched space filter (MSF) method. The qualitative HW
results for the RSF and RASF enhancement/reconstruction procedures are shown in Figs.
4(c) and 4(d) with the corresponding IOSNR quantitative performance enhancement metrics
reported in the figure captions (in the [dB] scale).
(a) (b)
(c) (d)
Fig. 4. VLSI-FPGA results for SAR images with 15dB of SNR: (a) Original test scene;
(b) degraded MSF-formed SAR image; (c) RSF reconstructed image (IOSNR = 7.67 dB);
(d) RASF reconstructed image (IOSNR = 11.36 dB).
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