Many progressive wavelet-based image coders are designed for good performance on natural images. They attempt to achieve the greatest reduction in mean squared error (MSE) with each bit sent, an approach that is most effective when the image is composed chiefly of low-frequency content. Many images, however, include sharp-edged objects, text characters or graphics that are not well handled by s...

A lineal illuminating system based on an optical fiber array is studied. It can be applied to automatic industrial inspection systems, e.g., those used for chromatic classification of ceramic floor tiles. Improvement in the existing system's performance is achieved by using a collimated beam, as shown by both photometric analysis and experimental results. This system has been implemented as par...

this study investigated 1) whether the effect of teacher-developed graphic organizers vis-à-vis student-developed ones was more significant on improving intermediate efl learners’ writing, and 2)whether the use of both graphic organizers had any impact on their writing. the participants were selectedin two stages: 130 students sat for a piloted proficiency test. those who scored above half ofth...

Effective computer graphic applications should accurately convey three dimensional shape. Previously, we investigated the contributions of shading and contour, specular highlights, and light source direction to three dimensional shape perception. Our experiments use displays of convex solid objects based on the superquadric parameterization, permitting continuous variation in their cross ection...

This pa.per demonstrates how image features of linear extent (lengths and spacings) image-independent constraints on un erlying surface cf encrate nearly orientations. General constraints are derived from the shape-from-texture paradigm; then. certain special cases are shown to be especially useful. Under orthography, the assumption that two extents are equal is shown to be identical to the ass...

An elementary lift of a binary matroid M that arises from coextension can easily be obtained by applying the splitting operation on M. This graphic may not produce matroid. We give method to determine forbidden minors for class matroids such any set k elements is again Using this method, we obtain k=2,3,4. One compute k≥5. As consequence, whose all lifts via coextensions are also graphic. There...