An entropy-based image segmentation method using template matching and boundary detection is described. A template is postulated to approximate the true scene that gives rise to the gray-scale image to be segmented. The degree of approximation is measured by an index called Gray-scale Image Entropy (GIE); which is defined to measure the amount of information contained in a gray-scale image. It ...

Title of Dissertation: ELECTROSTATIC MEMS ACTUATORS USING GRAY-SCALE TECHNOLOGY Brian Carl Morgan, Doctor of Philosophy, 2006 Dissertation directed by: Professor Reza Ghodssi Department of Electrical and Computer Engineering Institute for Systems Research The majority of fabrication techniques used in micro-electro-mechanical systems (MEMS) are planar technologies, which severely limits the str...

The paper presents techniques for the construction of invariant gray scale features. That are characteristics of gray scale images which remain constant if the images are transformed according to the action of a transformation group. We rst introduce a general method applicable to arbitrary transformation groups and specialize the results afterwards to the group of image rotations and translati...

Background and aims. Cone-beam computed tomography (CBCT) is an imaging system which has many advantages over computed tomography (CT). In CT scan, Hounsfield Unit (HU) is proportional to the degree of x-ray attenuation by the tissue. In CBCT, the degree of x-ray attenuation is shown by gray scale (voxel value). The aim of the present study was to investigate the relationship between gray scale...

In an attempt to mimic human (colorful) texture classification by a clustering algorithm three lines of research have been encountered, in which as test set 180 texture images (both their color and gray-scale equivalent) were drawn from the OuTex and VisTex databases. First, a k-means algorithm was applied with three feature vectors, based on color/gray values, four texture features, and their ...

The prospects for gray-scale (or multilevel) digital holographic data storage are theoretically and experimentally investigated. A simple signal-to-noise ratio (SNR) partitioning argument shows that when SNR scales as 1 over the number of holograms squared, five gray levels (log(2) 5 bits/pixel) would be expected to result in a 15% capacity increase over binary data pages. However, the addition...

It present the comparison of the performance of two different compression wavelet schemes namely Spatial-orientation Trees Wavelet (STW) and Adaptively Scanned Wavelet Difference Reduction (ASWDR). The paper analyses the compression schemes using gray scale image and color scale Image such that the quality of the reconstructed image. The characteristics of quality performance is calculate STW a...

In this paper, two new geodesic distance transforms for gray-scale images are presented. The first transform, the Distance Transform on Curved Space (DTOCS), performs the calculation with integer numbers. The second transform, the Weighted Distance Transform on Curved Space (WDTOCS), gives a weighted distance map with real numbers for an arbitrary gray-value image. Both transforms give a distan...