We generalize a previously proposed imaging scheme to situations for which the set of hidden objects embedded in the highly scattering medium can take arbitrary shapes. We compare the accuracy of images obtained from optical detection fibers with those from a ccd camera. The latter approach is more efficient and can be applied to non-contact geometries, but it requires an a priori linearization of the obtained digitized images. We discuss some details of this calibration for the camera and establish its potential as a new tool for decomposition based imaging.