Figure 2. Acquired images using the different imaging configurations.

(a) Ghost-imaging (GI) configuration with the object in the heralding arm and the camera triggered by the heralding detector. (b) Heralded imaging (HI) configuration where the object is in the camera arm and the camera is triggered by the heralding detector and (c) Direct imaging configuration, where the object is in the camera arm and the camera is internally triggered. It can be seen that we obtain a clear image with high contrast in both the GI and HI configurations, while the random nature of the detection mechanism in the direct imaging configuration yields only a very low contrast image. Scale bar, 650 μm.