We describe new image analysis developments in support of the U.S. Department of Energy’s (DOE) Advanced Gas Reactor (AGR) Fuel Development and Qualification Program. We previously reported a non-iterative, Bayesian approach for locating the boundaries of different particle layers in cross-sectional imagery. That method, however, had to be initialized by manual preprocessing where a user must s...

Color is a feature of the great majority of content-based image retrieval systems. However the robustness, effectiveness, and efficiency of its use in image indexing are still open issues. This paper provides a comprehensive survey of the methods for color image indexing and retrieval described in the literature. In particular, image preprocessing, the features used to represent color informati...

Owing to the characteristics of long distance and strong penetration, a synthetic aperture radar (SAR) imaging system could provide ground information with high resolution under poor climate environment. Nevertheless, speckle is still common interference output that deteriorates content SAR images further affects recognition real objects. In this article, new suppression method proposed from pe...

A divide-and-conquer strategy in shape from shading problem under fully perspective condition is proposed for the information recovery of book surfaces. The whole recovery process is composed of three sequential steps : preprocessing, apparent shape recovery, and ortho-image generation. Pure shade images are extracted at preprocessing step by introducing phenomenological model of interre ection...

The use of digital image processing techniques for solving application-specific problems confronts the user with a manifold variety of tasks. However, when the image data originate from natural scenes, there are several essential aspects shared by most of these tasks. It is useful to try to recognize these common aspects, because they can serve as guidelines to the development of low-level imag...

Image segmentation is a technique in image processing where an image is divided into meaningful structures to simplify its representation. Vector quantization helps to map the continuous pixel of input space to discrete pixels in the output image. Here the advantage is to minimize the information loss. The approach in this paper focuses on the spatial as well as the gray level value of the imag...

segmentation and three‑dimensional (3d) visualization of teeth in dental computerized tomography (ct) images are of dentists’ requirements for both abnormalities diagnosis and the treatments such as dental implant and orthodontic planning. on the other hand, dental ct image segmentation is a difficult process because of the specific characteristics of the tooth’s structure. this paper presents ...

Photometry of individual sources requires an initial phase of detection. The detection process can be separated into two phases: (1) preprocessing of the image, and (2) actual detection, yielding a list of discrete sources. Given a distribution of background intensities, the probabilityof intensitydeviations for light sources as a result of the background can be calculated. Setting a maximum ac...