Skeleton-based morphological coding of binary images.

This paper presents new properties of the discrete morphological skeleton representation of binary images, along with a novel coding scheme for lossless binary image compression that is based on these properties. Following a short review of the theoretical background, two sets of new properties of the discrete morphological skeleton representation of binary images are proved. The first one leads to the conclusion that only the radii of skeleton points belonging to a subset of the ultimate erosions are needed for perfect reconstruction.

Fast DCT domain filtering using the DCT and the DST.

A method for efficient spatial domain filtering, directly in the discrete cosine transform (DCT) domain, is developed and proposed. It consists of using the discrete sine transform (DST) and the DCT for transform-domain processing on the in JPEG basis of the previously derived convolution-multiplication properties of discrete trigonometric transforms. The proposed scheme requires neither zero padding of the input data nor kernel symmetry.

Chronic neurotic encopresis as a paradigm of a multifactorial psychiatric disorder.

Chronic neurotic encopresis (CNE), a childhood psychiatric disorder characterized by inappropriate fecal soiling, necessitated the formation of the following specific etiological factors: a) a neurologically immature developmental musculature, an organic condition which may complicate toilet training; b) premature or harsh toilet training; c) a family constellation in which the father is frequently absent and the mother erratic, emotionally inappropriate, and distant; d) the child's formation of a noncommunicative, passive, dependent personality. All of these factors are helpful in explaining the occurrence of CNE, which is thus seen as the result of a synergistic interaction among them. The complexity of etiological agents dictates a multifactorial rather than unicausal model of mental illness.