Fig. 2.

Representative CCD data for the image reconstructions shown in Fig. 1. Each image corresponds to the measured light intensity for a single source beam position. The left column shows the reference intensity I₀ when the target is not present (scattering fluid only). The middle column shows the intensity I when the target is present. The right column shows the Rytov data, ϕ = −log(I/I₀), which is used in the reconstruction algorithm. (a) The target consists of the letters “DOT” and “PENN” (b) The target consists of the letters “DOT” only