In this paper the analysis of gray level corner detection has been carried out. Performances of various cornerness measures are discussed with respect to four performances of robustness: detection, localization, stability and complexity. We have analyzed the interior di€erential features of the image surface of these cornerness measures. This paper presents a new approach called gradient-direct...

A level-embedded lossless compression method for continuous-tone still images is presented. Level (bit-plane) scalability is achieved by separating the image into two layers before compression and excellent compression performance is obtained by exploiting both spatial and inter-level correlations. A comparison of the proposed scheme with a number of scalable and non-scalable lossless image com...

In this paper, we will introduce a new corner detector and compare its performance with other three popular corner detectors. The new detector assumes a welldefined corner of a gray level image should have a good corner structure that is similar with the ideal corner structure. Experiments have shown that the new corner detector is accurate and efficient. What’s more, the corner detector estima...

Vasile PATRASCU Department of Informatics Technology, Romanian Air Transport (TAROM) e-mail: [email protected] Ioan VOICU Advanced Technologies Institute e-mail: [email protected] Abstract: In this paper we propose a new algebraical model for the gray level images. It can be used for digital image processing. The model adresses to those images which are generated in improper light conditions (...

This paper presents a method for enhancing the gray level images. This method takes part from the category of point transforms and it is based on interpolation functions. The latter have a graphic represented by polygonal lines. The interpolation nodes of these functions are calculated taking into account the statistics of gray levels belonging to the image.

When identifying a writer from a handwritten text, most often, either some characteristic patterns or some shape parameters are extracted. They are assumed to be specific of the writer. Here, we are to explore a different approach, we consider the distribution of the pixel gray levels within the line. It is linked to pressure and writing speed when text is realized. In the line, the direction t...

One of the most utilised criteria for segmenting an image is the gray level values of the pixels in it. The information for identifying similar gray values is usually extracted from the image histogram. We have analysed the problems that may arise when the histogram is automatically characterised in terms of multiple Gaussian distributions and solutions have been proposed for special situations...

This paper proposes a new method for reduction of the number of gray-levels in an image. The proposed approach achieves gray-level reduction using both the image gray-levels and additional local spatial features. Both gray-level and local feature values feed a self-organized neural network classifier. After training, the neurons of the output competition layer of the SOFM define the gray-level ...

Research Center of Engineering and Applied Sciences (CIICAp), Autonomous University of Morelos State (UAEM); Av. Universidad No. 1001 Col. Chamilpa, C.P. 62210, Cuernavaca, Morelos, Mexico. Joint Research Unit Food Process Engineering (Cemagref, ENSIA, INAPG, INRA) ENSIA, 1 avenue des Olympiades, 91744 Massy Cedex France. c National Institute of Perinatology, Montes Urales 800, Lomas de Virreye...

Digital watermarking has recently emerged as an important area of research to protect the copyright of multimedia and internet data. Most of other literatures focus on the algorithms of embedding one-dimensional watermarks or twodimensional binary digital watermarks. In this work, a robust method of embedding a gray-level digital watermark into an image is proposed. A gray-level digital waterma...