An analytic study of the reaction probability integrals corresponding to the various forms of the slowly varying cross-section factor S(E) is attempted. Exact expressions for reaction probability integrals are expressed in terms of the extended gamma functions.

Gamma is one of the most misunderstood concepts in computer imaging applications. Part of the reason is that the term is used to mean several different things, completely confusing the user. The purpose of this memo is to draw distinctions between the several uses and to propose a fixed meaning for the term: Gamma is the term used to describe the nonlinearity of a display monitor. This is the h...

For a given ground cover class, there is no straightforward way of expressing the joint distribution of a set of correlated radar images represented in amplitude or intensity. In this article we propose a general transformation method that permits incorporation of inter-image covariance while keeping a good fit to the marginal distributions. The approach is here studied for Gamma marginals, and...

This paper presents invariants under gamma correction and similarity transformations. The invariants are local features based on differentials which are implemented using derivatives of the Gaussian. The use of the proposed invariant representation is shown to yield improved correlation results in a template matching scenario.

We virtually restore faded black and white photographic prints by the method of decomposing the image into a smooth component that contains edges and smoothed homogeneous regions, and a rough component that may include grain noise but also fine detail. The decomposition into smooth and rough components is achieved using a rational filter. Two approaches are considered; in one, the smooth compon...

A comparison of topographic correction methods is conducted for Landsat-5 TM, Landsat-7 ETM+, and SPOT-5 imagery from different geographic areas and seasons. Three successful and known methods are compared: the semi-empirical C correction, the Gamma correction depending on the incidence and exitance angles, and a modified Minnaert approach. In the majority of cases the modified Minnaert approac...

With the increased interest in new PET tracers, gene-targeted therapy, immunoPET, and theranostics, other radioisotopes will be increasingly used in clinical PET scanners, in addition to (18)F. Some of the most interesting radioisotopes with prospective use in the new fields are not pure short-range β(+) emitters but can be associated with gamma emissions in coincidence with the annihilation ra...