Three-dimensional Image Processing Research Articles

Localization of ribosomal and telomeric DNA sequences in intact plant nuclei by in‐situ hybridization and three‐dimensional optical microscopy

We have combined the use of three-dimensional (3-D) fluorescence microscopy and computer image processing of images with in-situ hybridization to analyse the 3-D organization of interphase nuclei in plants. In sections of root tips of Pisum sativum, using cDNA probes, we have shown that telomeres are arranged around the nuclear periphery and that the ribosomal genes in this species appear to exist in discrete, 3-D domains.

4835688 Three-dimensional image processing apparatus : Tokunori Kimura, Utsunomiya, Japan assigned to Kabushiki Kaisha Toshiba

4835688 Three-dimensional image processing apparatus : Tokunori Kimura, Utsunomiya, Japan assigned to Kabushiki Kaisha Toshiba

Three-dimensional image processing in the analysis of triple γ-ray energy coincidences

A first approach to analyze triple coincidence events from nuclear γ-ray spectroscopy is presented. Emphasis is laid on tracing rotational correlation properties in nuclei. Possible ways of reducing the necessary data storage volume are discussed. Data are presented as different cuts in the three-dimensional volume, transverse planes and rotational planes. An improvement in the peak-to-background ratio of a factor 7 is found compared to a two-dimensional data set. Different ways to extract the nuclear moment of inertia parameters are presented.

海洋土木における水中超音波三次元計測と画像処理

海洋土木における水中超音波三次元計測と画像処理

Optical profilometry and three-dimensional digital image processing as a tool for the prevision of cavitation erosion

An optical profilometry method by phase measurement with a CCD array sensor is applied to the study of cavitation erosion. 3-D data deduced from the digital image processing of the eroded sample surface analysis yield to the extracted matter volume and the histogram of impact distribution, as required for the first step of cavitation phenomenon analysis. Several digital operators and encoding operations are used. The optical method and the digital processing can be extended to other corrosion phenomena.

Contour Processing and 3-D Image Processing of Sea Beam Bathymetric Data

The Sea Beam system was installed aboard the survey vessel Takuyo (Nakanishi, 1985), in September 1983. It is currently used for continental shelf surveys, bathymetric surveys for predicting earthquakes and other survey activities. Besides these activities, we have been engaged in the development of a computerized system for drawing precise bathymetric charts based on digital Sea Beam data logged on magnetic tapes. So far we have completed two programs — one for drawing bathymetric contour charts aboard a survey vessel and the other for drawing bathymetric contour charts on shore. By means of the former program one can gradually draw depth contours covering the swath width of Sea Beam along the track of the survey vessel. The latter program enables one to draw very precise bathymetric charts through batch processing of all Sea Beam data of the area surveyed. Incorporated in the latter program are data processing steps to delete defective data, reduce dispersion of data, make a mesh system and adjust the mesh size according to the depth of water. Furthermore, taking advantage of the precision and high density of Sea Beam data, the author developed a three-dimensional image processing program to represent clearly the topography of the seafloor. We have used these programs with the Sea Beam data obtained in bathymetric surveys, and as a result have confirmed their practicability and validity.

An environment for three-dimensional shaded perspective display of cell components

An integrated environment for converting electron microscopic profile images into shaded perspective displays is described. Its application, reported here, is to the display of various cell organelles; it can also be used for other image acquisition modalities. What separates this application from other, primarily medical ones, is its complexity, since dictyosomes have been employed for the development of the display program. The surface profile structures of these organelles are among the most complicated being processed for scientific applications. Therefore, a high degree of interactivity had to be integrated into the three-dimensional image processing described.

Three-dimensional image processing using the concept of network resonance

It is shown that simple algebraic methods may be used to design three-dimensional (3-D) recursive digital filters for two important applications: first, the selective enhancement of a two-dimensional (2-D) signal that is moving with time along a linear trajectory at known velocity and, second, the selective enhancement of 3-D spatially planar waves. The design techniques involve first-order 3-D networks in the continuous domain and proceed by analogy with an extension of the simple circuit theoretic concepts of resonance and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Q</tex> factor. A 3-D spatial straight-line filter is designed in the frequency domain as a 3-D planar filter and, conversely, a 3-D spatially planar filter is designed in the frequency domain as a 3-D straight-line filter.

Computer construction and presentation of 3D images

Three-dimensional reconstruction is a subject of considerable importance in many scientific and engineering investigations. This study is concerned with the development of new computer techniques and system by which the structures of an object are assembled for precise interpretation from their two-dimensional ultrasonic images. This paper describes a computer controlled ultrasonic scanning and data acquisition system, a set of computer algorithms for reconstructing ultrasonic attenuation from transmission scans, i.e. computerized ultrasonic tomography, and an image processing system for three-dimensional image processing and presentation. The above systems and techniques are illustrated using a simple phantom and an example of reconstructed three-dimensional image of this phantom in terms of ultasonic attenuation is presented.