This paper proposes a gray-scale inverse Hough transform (GIHT) algorithm which is combined with a modified gray-scale Hough transform (GHT). Given only the data of the Hough transform (HT) space and the dimensions of the image, the GIHT algorithm reconstructs correctly the original gray-scale image. As a first application, the GIHT is used for line detection and filtering according to conditio...

In this paper, the authors have proposed a method of segmenting gray level images using multiscale morphology. The approach resembles the watershed algorithm in the sense that the dark (respectively bright) features which are basically canyons (respectively mountains) on the surface topography of the gray level image are gradually filled (respectively clipped) using multiscale morphological clo...

A method for using gray-scale statistics for the inspection of assemblies is described. A test image of an assembly under inspection is registered with a model image of a nondefective assembly and the two images are corn ared on the basis of two statistical tests: a X 3 test of the two marginal gray-level distributions and the correlation coefficient of the joint distribution. These tests are m...

In this paper, a topographic feature classification method based on 4directional scanning, and a stroke extraction method from skeletal pixels are proposed. Combination of the proposed methods is relatively fast and the resulting strokes are more acceptable.

The Lattice Boltzmann (LB) method has been shown to be a highly efficient numerical method for solving fluid flow in confined domains such as pipes, irregularly shaped channels or porous media. Traditionally the LB method has been applied to flow in void regions (pores) and no flow in solid regions. However, in a number of scenarios, this may not suffice. That is partial flow may occur in semi-...

Grey-scale ultrasonography was performed without access to detailed clinical information in a prospective study of 55 jaundiced patients. Forty-one were eventually proved to have an extrahepatic obstructive cause, and 14 had intrahepatic "medical" disease. Satisfactory ultrasound images were obtained in 54 patients, and the bile duct calibre was correctly reported in 53 (96%). All 14 medical ca...