Fig. 1. Schematic of speckle illumination

Fig. 2. Images of the exit-surface of the diffuser with different distances between the object and the front surface of the diffuser. (a) 10 mm;(b) 2 mm;(c) 0 mm

Fig. 3. Numerical simulation of the imaging process. (a) The object and the point source; (b) speckle field of the object; (c) speckle field of the point source; (d)interference pattern of the two speckle field; (e) result of Fourier transform based on Fig. (d);(f)object extracted from Fig. (e);(g) intensity profile along the blue dashed line in Fig. (e)

Fig. 4. Imaging the object hidden between two diffusers. (a) Experimental setup; (b) the output image as seen by naked eyes; (c)-(e) speckle images captured by the camera; (f)-(h) reconstructed images by Fourier transform

Fig. 5. Real-time imaging of a moving object. (a) Sketch of the moving object; (b) reconstructed images of the object at three time points

Fig. 6. Noninvasive imaging for a reflective object. (a) Target object; (b) experimental setup; (c) raw image captured by the camera; (d) reconstructed image from a single image; (e) result after the average and filter