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Showing papers on "Orientation (computer vision) published in 1974"


Patent
11 Nov 1974
TL;DR: In this paper, a digital processor for extracting data from a binary image is presented, in which the image is divided into an array of sample areas, each sample area containing an arrays of binary data spaces, patterns formed by adjacent data spaces within the sample sample represent local line orientations.
Abstract: A digital processor for extracting data from a binary image in which the image is divided into an array of sample areas, each sample area containing an array of binary data spaces. Patterns formed by adjacent data spaces within the sample sample represent local line orientations from which the image characteristics are determined. Sample areas linearly arrayed in the direction in which the image is scanned are simultaneously processed to extract the line orientation information contained therein.

65 citations


Patent
30 Jan 1974
TL;DR: In this paper, the fingerprint ridge line orientation in a plurality of finite sampling areas of the fingerprint image is inspected with the aid of a rotating onedirectional light smearing element inserted in the reimaging light path.
Abstract: Apparatus for fingerprint recognition is disclosed utilizing relatively simple and inexpensive non-coherent optical processing techniques wherein the fingerprint ridge line orientations in a plurality of finite sampling areas of the fingerprint image are inspected with the aid of a rotating onedirectional lightsmearing element inserted in the reimaging light path. The apparatus employs light that is transmitted or scattered by the rotating element and uses the consequent time variation of the light level at an image plane to determine ridge orientation. At the image plane of the processor, there is located a plurality of photodetectors, each individual detector of the array corresponding to a particular sampling area of the fingerprint. The time delay between a reference orientation of the light smearing element and the occurrence of a light peak at each detector may be noted and a proportional analog or digital representation may be generated for immediate or subsequent comparison with corresponding signals representative of the fingerprints being presented for identification.

28 citations


Patent
12 Nov 1974
TL;DR: In this article, a data field is provided to a surface of objects in particular orientation having contrasting data markings arranged in at least one track, and a contrasting line pattern identifies location and orientation of the data field, the lines of the pattern extend in a first direction, the thickness and/or spacing of the lines is asymmetric in a direction normal to the first direction.
Abstract: Objects are identified by means of data information and may appear in random position and orientation and at random times in a particular area; a data field is provided to a surface of the objects in particular orientation having contrasting data markings arranged in at least one track, and a contrasting line pattern identifies location and orientation of the data field, the lines of the pattern extend in a first direction, the thickness and/or spacing of the lines is asymmetric in a direction normal to the first direction; the particular area is line-for-line scanned for repeatedly detecting a particular signal pattern resulting from scanning across the line pattern in a data field, the data field position and orientation is determined upon repeatedly detecting the particular signal pattern, and a unique data field scanning pattern is provided on the basis of the position and orientation determination, for causing the data track to be scanned repeatedly in direction of its extension and for reading the data contained therein.

24 citations


Journal ArticleDOI
TL;DR: The design and operation of a simple, semi‐automatic video system for the analysis of geometric parameters of microscopic specimens is described and it is found that this system is suitable for densitometric and specimen motion analyses.
Abstract: SUMMARY The design and operation of a simple, semi-automatic video system for the analysis of geometric parameters of microscopic specimens is described. The system consists of standard video equipment and a custom built Electronic Integrator. The video signal from a camera attached to a microscope is mixed with the video signal from a second camera focused on a drawing board. A contour outline of the specimen to be analysed is drawn with the aid of a video monitor display of the combined images. The contour image is passed into the Electronic Integrator and analysed automatically. Logic circuitry in the Electronic Integrator permits analysis of complex contours independent of their orientation in the video raster. The area or volume of complex, overlapping specimens with restricted grey scale range can be rapidly analysed. The Electronic Integrator also is suitable for densitometric and specimen motion analyses.

23 citations


Journal ArticleDOI
TL;DR: In this paper, the use of an X-ray recording microdensitometer and computer permits quantitative and automatic analysis of the crystal orientation patterns determined by the Starkey method, and three computer programs are used.
Abstract: The use of an X — Y recording microdensitometer and computer permits quantitative and automatic analysis of the crystal orientation patterns determined by the Starkey method. Three computer programs are used. Program REDUCE is specifically to interpret the X-ray diffraction photographs. Correction factors for background and absorption can be applied and the equivalent reflected and transmitted diffracted intensities can be used to normalize the data. The orientation pattern of the selected lattice plane is computed, plotted on a Lambert Equal Area, lower hemisphere projection.The remaining two computer programs are applicable to any orientation pattern represented in spherical projection. The first, CONTOUR, contours the data on the projected hemisphere. The data may be rotated prior to contouring. Program PREDICT enables the orientation of any crystallographic direction to be predicted from one or more measured orientation patterns.The procedure is illustrated by the analysis of quartz orientation in a quartzite from Bergsdalen, Norway.

7 citations


Patent
19 Jun 1974
TL;DR: In this article, an optical reading machine for two-dimensional line patterns for the optical transformation of such a line pattern in a number of spaced channels into opto-electronically detectable images each of which is correlated with the original line pattern and extracts a certain line orientation therefrom by means of an optical filter in each channel having uni-directional power of resolution and one-dimensional redundancy.
Abstract: An apparatus for use in an optical reading machine for two-dimensional line patterns for the optical transformation of such a line pattern in a number of spaced channels into opto-electronically detectable images each of which is correlated with the original line pattern and extracts a certain line orientation therefrom by means of an optical filter in each channel having uni-directional power of resolution and one-dimensional redundance, said optical filters being arranged with different directions of resolution in the individual channels, the image plane of each channel being raster sub-divided into elementary areas each of which is subjected to an opto-electronical detection of the presence of line segments or tangential inclinations having a direction corresponding to the resolution of the same channel.

2 citations