Figure 2: Scenedesmus samples captured by pixel-SR time-stretch imaging.
From: All-passive pixel super-resolution of time-stretch imaging
Comparison of images in high resolution (80 GSa/s, 0.2 μm/pixel), low resolution (5 GSa/s, 3.6 μm/pixel) and pixel-SR (equivalent to 20 GSa/s, 0.9 μm/pixel) for different cell sub-types: (a) discarded exoskeleton; (b) colonies with two daughter cells; (c) colonies with four daughter cells. Refer to Supplementary Fig. S2 for more examples. (d) Image collage of all 5,000 colonies and fragments acquired at 5 GSa/s. (e) Corresponding 2D Fourier spectrum of images captured at 80 GSa/s, and (f,g) Fused 2D Fourier spectra of 5,000 LR and pixel-SR images. The red circle represents the spatial resolution limit at 2 μm, i.e. at around 9.3 GHz temporal bandwidth from the time-stretch microscope. (h) 1D profile of the Fourier spectra along the fast axis. Interactive version of panel (d) is available online at http://www.eee.hku.hk/~cschan/deepzoom/.
