Figure 5

Sample video frames acquired for different levels of zoom. The object, a USAF test target, is located at a distance of 2 meters from the camera. The left column shows the image when sampled fully at 64 × 64 pixel resolution with fixed mirror binning of 12 × 12 and digitally zooming into the central region of interest by a factor of 2 and 4. In contrast the right column shows the image fully sampled at 64 × 64 pixel resolution, but for 12 × 12, 6 × 6 and 3 × 3 mirror binning, equivalent to providing a physical zoom of 1×, 2× and 4×, respectively.