Showing papers on "3D reconstruction published in 1987"
TL;DR: In this article, a method of "angular reconstitution" is described, which allows the a posteriori determination of the relative angular orientations of the projections and thus enables the 3D reconstruction of the object to be calculated.
583 citations
TL;DR: High resolution three dimensional connectivity, surface construction and display algorithms that detect, extract, and display the surface of a brain from contiguous magnetic resonance (MR) images provide a non-invasive procedure for examination of the brain surface and other anatomical features.
218 citations
TL;DR: The FD3 is a double Fourier transform of serial cross-sectional contours of a shape in three dimensions (3D), which retains all shape information and gives a compact and invariant representation.
23 citations
TL;DR: The making of two-dimensional serial cross-sections and their storage for subsequent manipulation and display on a personal computer and the 3D reconstructions found ideal for understanding the temporal changes occurring in embryonic brains subjected to defined maternal heat stresses are described.
6 citations
01 Mar 1987
TL;DR: This paper presents a method for 3D reconstruction by backprojection of 2D views that uses readily available passive imaging sensors and a computer-controlled positioner to directly produce a3D reconstruction of the part.
Abstract: Extraction of 3D information from 2D views is an important problem in the inspection of manufactured parts. Inspection for defects and correctness of shape and size requires accurate 3D information. In this paper we present a method for 3D reconstruction by backprojection of 2D views. This method uses readily available passive imaging sensors and a computer-controlled positioner to directly produce a 3D reconstruction of the part. Consistency based processing is introduced as a method of increasing reconstruction accuracy by exploiting redundant data in the multiple images. Maximum effciency and accuracy in reconstruction is achieved using optimal view patterns and reliable silhouette extraction techniques. Although this method is applicable to the inspection of general machine parts, our immediate application was in the inspection of laser-drilled rivet holes and laser-drilled cooling holes in jet engine turbine blades.
3 citations
11 May 1987
TL;DR: The goal of this research was to remove the labor-intensive human visual segmentation, by adding rudimentary visual processing capabilities to the computer graphics system.
Abstract: A system is described for the automation of the color separation process. In current color separation systems, humans must visually segment line-art images, and using pen and ink, delineate the segments in a manner that enables a computer graphics system to be used interactively to color in each segment. The goal of this research was to remove the labor-intensive human visual segmentation, by adding rudimentary visual processing capabilities to the computer graphics system. This is possible through the use of computer vision algorithms which incorporate general knowledge about line-art, and are based on image features that are used by the human visual system in the early stages of visual processing. A major color separation company is planning the hardware implementation of a vision-graphics system based on these algorithms, and the State University of New York is applying for two patents based on this research.
2 citations
TL;DR: A simple consistency measue based on shape is presented that allows Tracer to recognize this error and recovery is achieved by extending previously computed trial boundaries until an improved boundary is computed.
2 citations
2 citations