The statistics of gray level differences have been successfully used in a number of texture analysis studies. In this paper we propose to use signed gray level differences and their multidimensional distributions for texture description. The present approach has important advantages compared to earlier related approaches based on gray level cooccurrence matrices or histograms of absolute gray l...

The paper presents some aspects of the (gray level) image binarization methods used in artificial vision systems. It is introduced a new approach of gray level image binarization for artificial vision systems dedicated to industrial automation – temporal thresholding. In the first part of the paper are extracted some limitations of using the global optimum thresholding in gray level image binar...

introduction: the materials used for root-end filling and perforation repair are in direct contact with live tissues e.g. bone and connective tissue; their effects however, are uncertain. the aim of this ex vivo study was to evaluate the osteoblastic secretory activity adjacent to gray and white mineral trioxide aggregate (mta) and intermediate restorative material (irm). materials & methods: t...

Ice cover County has a significant impact on rivers as it affects with the ice melting capacity which results in flooding, restrict navigation, modify the ecosystem and microclimate. River ices are made up of different ice types with varying ice thickness, so surveillance of river ice plays an important role. River ice types are captured using infrared imaging camera which captures the images e...

In this paper we introduce a parallel algorithm for thinning gray scale images. The algorithm is based on repeatedly conditionally eroding the gray level objects in the image until a one pixel thick pattern is obtained along the center of the high intensity region. Erosion conditions are devised to assure preserving connectivity. To properly handle objects with hollows, gray level gradient is u...

N-ary gray-level (nGL) coding strategy is an effective method for absolute phase retrieval in the fringe projection technique. However, conventional nGL contains many unwrapping errors at boundaries of codewords. In addition, number codewords limited only one pattern. Consequently, this paper proposes a new based on half-period coding, which can improve both these two deficiencies. Specifically...

This paper explores the utilization of adaptive triangular meshes representing gray-level images to accelerate basic image processing operations. In particular, two algorithms for thresholding and labeling gray-level images represented with adaptive triangular meshes are described and evaluated. Experimental results with real gray-level images show that it is possible to perform faster by worki...