Fig. 4: SPI-ASAP in reflection mode.
From: Compressed ultrahigh-speed single-pixel imaging by swept aggregate patterns
a Photo of the internal components of the mechanical watch. b Selected frames of the running mechanical watch movement imaged at 103 fps. c Time evolution of the intensity of the three selected pixels (marked in the expanded inset from (b)), illustrating the approximate 2.5 Hz motion of the balance wheel and the 5.0 Hz intermittent motion of the escape wheel. Thick lines show moving averages (7-frame window) with raw data shown by the thin lines. d Experimental setup for imaging the rupture of a popcorn kernel. e Selected frames of the heating-induced rupture imaged at 298 fps with 50% sampling. f Traced outlines of the kernel from selected frames showing its expansion during rupture.
