Fig. 1. Experimental setup of the influence of the sparsity of random speckle illumination on GI.

Fig. 2. Experimental results of GI and GISC under different noise levels. (a)–(d) are imaging results of GI under 0 mW, 0.1 mW, 0.6 mW, and 3 mW noise light power, respectively; (e)–(h) are imaging results of GISC under 0 mW, 0.1 mW, 0.6 mW, and 3 mW noise light power, respectively. From top to bottom, (i)–(vii) represent the sparsity of {1, 64, 512, 2048, 3584, 4032, 4095}/4096, respectively.

Fig. 3. SSIM of GI and GISC under different noisy light levels. (a) and (b) are SSIM of GI and GISC versus sparsity of patterns, respectively.

Fig. 4. Analysis result of GI. (a) The curve of grayscale fidelity γ; (b) the curves of DSNR under different noise levels.

Fig. 5. Analysis result of GISC. (a) The curve of mutual coherence μ; (b) the curves of DSNR under different noise levels.