Compressed sensing by two-directional line sensing

We propose an imaging method using commercially available profile sensor. Specifically, we use a multipixel CMOS area sensor capable of acquiring projection profiles and perform high-speed compressed sensing based on horizontal and vertical 2-way line sensing. The proposed method reduces the number of measurements M to N/2 x CR frames for an image of N-2-pixel, while the compressed sensing (CS) using a single-pixel camera (SPC) and N-2 x CR frames of measurement are required where CR is the compression ratio defined by M/N-2. From the numerical simulations, we confirm that the peak signal-to-noise ratio (PSNR) for 8 bits quantization obtained by using the proposed method is comparable to that of the SPC and higher than that of CS using a conventional multipixel imager. We experimentally confirm that the PSNR is 21.6 dB for 8 bits quantization. Compared to SPC, the proposed multipixel detection enables higher throughput by a factor of 2N, leading to high-speed image acquisition.