Abstract:
A method of and apparatus for obtaining radiation interaction data related to an image of an object. The method involves using a detector system for detecting and collecting spectroscopically resolvable information about incident radiation, and collecting one or more datasets of information at the detector after interaction with an object. Each dataset is resolved across at least three frequency bands within the spectrum of the source. The ratio between measured intensities is evaluated for at least two pairs of such frequency bands in a given intensity dataset to obtain a numerical indicator in functional relationship with a material property. The numerical indicator is then compared with a library of data characteristics of target materials. An apparatus is also disclosed for inspection of materials.
Abstract:
A method and apparatus for the identification and detection of composition of a liquid are disclosed. The invention involves detecting and collecting spectroscopically resolvable information about incident radiation, and collecting one or more datasets of intensity information at the detector system. Each dataset is resolved across at least three frequency bands within the spectrum of the source to produce an intensity data item for each band. A numerical relationship is evaluated for at least two pairs of frequency bands in a given intensity dataset to obtain a numerical indicator functionally related to a characteristic physical material property such as a material coefficient that varies functionally with radiation energy. The numerical indicator is compared with a library of data for a range of potential component liquids in order to obtain an indication of the likely composition of the liquid sample. An apparatus for use in identifying and detecting a liquid is also disclosed.
Abstract:
An apparatus for generating and displaying an image of an object comprising a radiation source and a series of at least two linear detectors capable of resolving incident source radiation spectroscopically spaced therefrom to define a scanning zone therebetween; means to cause an object to move relative to and through the scanning zone in use; an image generation apparatus to generate at least a first image from the output of a first linear detector, a second image from the output of second linear detector, and a third image, such that each such image includes a representation of spectroscopically resolved incident radiation; an image display adapted successively to display at least the first, second and third such images and thus display the monocular movement parallax between the images.
Abstract:
A method of creating a 2½D solid model picture in which a stereoscopic image is identified as a series of depth slices and the resulting slice data is built up to a 2½D model using appropriate computer software. The method compares a stereoscopic pair at a relative lateral position and identifies those points of coincidence so as to create a slice through the picture at a depth corresponding to that particular relative lateral position. The pair is then moved laterally relative to each one another by an amount equal to the minimum detectable parallax and the comparison is repeated as often as is required to identify points of coincidence at all parallax depths or slices of the stereoscopic picture. The 2½D solid model image is then built by using the obtained slice data.
Abstract:
A method and apparatus are described for the collection and interpretation of radiographic data from an object scanned by a suitable radiation source. A radiation detector system is provided that is detecting and collecting spectroscopically resolved information. An object is scanned from a plurality of perspectives, and the resultant data from each perspective resolved into at least three spectroscopic energy bands. For each such resolved spectroscopic energy band an image analysis is performed to derive depth slicing to produce a series of output datasets each comprising a 2-D dataset of intensity information resolved to a single energy band and depth slice.
Abstract:
A method of and apparatus for obtaining radiation transmission data from a liquid in such manner that allows some data about relative proportions of constituent ingredients to be derived is described. A radiation source and a radiation detector system able to resolve transmitted intensity across a plurality of frequencies within the spectrum of the source are used to produce transmitted intensity data for each such frequency. Measured data is compared numerically to a mass attenuation data library storing mass attenuation data, individually or collectively, for a small number of expected constituent ingredients of the liquid to fit each intensity data item to the relationship given by the exponential attenuation law: I/IO=exp [−(μ/ρ) ρt] in respect of the constituent ingredients and derive therefrom an indication of relative proportions of each constituent ingredient.
Abstract:
An apparatus and method for obtaining an image of an object. The apparatus comprises a radiation source and a series of two to five linear detectors spaced therefrom to define a scanning zone; means to cause an object to move relative to and through the scanning zone; a direct image generation apparatus to generate an image from the output of a linear detector; an intermediate image generation apparatus configured to generate at least one intermediate image from an adjacent pair of linear detectors, by processing the output of the pair of detectors and generating an image representative of an output intermediate between the two said detector outputs; the image apparatus adapted such that at least five and preferably at least six images are generated in total; an image display adapted successively to display such images and thus display the monocular movement parallax between the images.
Abstract:
An apparatus and method for obtaining an image of an object. The apparatus comprises a radiation source and a series of two to five linear detectors spaced therefrom to define a scanning zone; means to cause an object to move relative to and through the scanning zone; a direct image generation apparatus to generate an image from the output of a linear detector; an intermediate image generation apparatus configured to generate at least one intermediate image from an adjacent pair of linear detectors, by processing the output of the pair of detectors and generating an image representative of an output intermediate between the two said detector outputs; the image apparatus adapted such that at least five and preferably at least six images are generated in total; an image display adapted successively to display such images and thus display the monocular movement parallax between the images.
Abstract:
Apparatus and a method for producing a stereoscopic line-scan image of an object in which a detector camera is used to view the object, means are provided to move relative to one another the surface of the object past the detector in a direction which is at right angles to the scanning lines direction of the detector, and means are provided to select the outputs from two spaced lines in each picture frame produced by the detector and store those lines in a frame store to build up individual pictures from each of the two lines, so that one individual picture constitutes a left hand picture of a stereoscopic pair and the other individual picture constitutes a right hand image of a stereoscopic pair. Preferably the detector camera is a television camera or a full field digital.
Abstract:
A pair of stereoscopic images of an object are produced, one image is subtracted from the other, and the resulting two dimensional image is then checked against and compared with a similar two dimensional image (the golden image) which has been produced in an identical manner using a known perfect sample (the golden sample).