Showing papers on "Standard test image published in 1983"
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01 Nov 1983
TL;DR: An image processing apparatus for aiding analysis of images through the introduction of additonal physically displaced image elements in complementary color which are generated by digital processing of original image elements is described in this article.
Abstract: An image processing apparatus for aiding analysis of images through the introduction of additonal physically displaced image elements in complementary color which are generated by digital processing of original image elements. The added elements and original image are viewed stereoscopically on an electronic reconstructed image display.
54 citations
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22 Feb 1983
TL;DR: In this article, a method and apparatus for improving the geometric fidelity of images reproduced in a charged particle beam device is described, where the beam is deflected across a sensitive medium to form a test image of predetermined configuration.
Abstract: A method and apparatus are described for improving the geometric fidelity of images reproduced in a charged particle beam device. The beam is deflected across a sensitive medium to form a test image of predetermined configuration. The test image is compared with a reference image and geometric deviations measured, at a number of points, are used to calculate correction signals required to modify the beam deflection to offset the deviations. Circuit adjustments are then made to provide the calculated correction signals. The correction signal adjustments are accomplished in separate non-interactive circuits for each of a plurality of predetermined corrections which only require a one time adjustment.
35 citations
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02 Aug 1983TL;DR: In this paper, a two-dimensional image spectrum is generated from the composite image and then is whitened by setting the magnitude of every point of the spectrum to a uniform level, and values of the phase-only image exceeding a predetermined threshold are detected as an indication of a difference between the reference and test images.
Abstract: Image comparison is accomplished by forming a composite image composed of a reference image and a test image. A two-dimensional image spectrum is generated from the composite image and then is whitened by setting the magnitude of every point of the two-dimensional image spectrum to a uniform level. A phase-only image of the composite image is then constructed, and values of the phase-only image exceeding a predetermined threshold are detected as an indication of the location of a difference between the reference and test images.
33 citations
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01 Jan 1983TL;DR: The title of the paper suggests coverage of a very broad spectrum of problems in image processing which could be approached from the statistical point of view, although this excludes the problems of filtering, image reconstruction, enhancement and coding from consideration.
Abstract: The title of the paper suggests coverage of a very broad spectrum of problems in image processing which could be approached from the statistical point of view. Indeed, the spectrum could include topics ranging from image preprocessing, through image enhancement, to image understanding. However, the theme of this meeting — the analysis and interpretation of images — considerably narrows the subject of statistical image processing. It automatically excludes the problems of filtering, image reconstruction, enhancement and coding from consideration, although the solution of these may be a necessary prerequisite to successful machine perception of imagery data.
13 citations
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27 Jul 1983
TL;DR: In this article, a first heat image is digitized and stored, and then compared point-by-point with that of the second image, where the difference data is used to display on a CRT an optical image of the thermal differences between the two images.
Abstract: Techniques of image processing and display particularly adapted for use in thermography. A first heat image is digitized and stored. A second heat image is acquired, digitized and then compared point-by-point with that of the first image. Any differences in intensity between the two images are also stored. The difference data is used to display on a CRT an optical image of the thermal differences between the two images, thus allowing comparison of the heat radiant characteristics of one object with a standard, or such characteristics of an object at different times.
8 citations
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TL;DR: A microcomputer‐based video analyzer system has been developed to obtain area information from a variety of different sample types, using intensity information from the image to automatically obtaining area information, rather than the operator‐directed approach used in many digitizing systems.
Abstract: A microcomputer‐based video analyzer system has been developed to obtain area information from a variety of different sample types. Most programs are written in basic to analyze optical information with a conventional video camera and frame grabber. Intensity information from the image is used to automatically obtain area information, rather than the operator‐directed approach used in many digitizing systems. Real‐time operator modifications of the digitized image are possible, as well as image storage and retrieval and graphic display of the results.
2 citations
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12 Jan 1983
TL;DR: In this paper, a test image of a flat staircase is used to compare the white and black regions of the test image with a fixed image of the same colour component of the output image.
Abstract: Cine or video film transport mechanism is tested for picture steadiness by producing a first colour component of an output image and comparing with a second contrasting colour component of the output image as reference. The colours may be green and magenta. In a printer, an unexposed positive film may be exposed through a negative carrying a two colour test image, in a first run to one colour and in a second run to the other. In a camera, film may be exposed to a test image of two colours in a first run using a filter of one colour and in a second run using a filter of the other colour. A projector may be operated (a) as a camera (without the projector light) or (b) to project a one colour component of a test image and compare with the other colour component of the test image as a fixed image. The test image may be a Vernier scale or a "flat stair-case" (as shown). Testing may be effected automatically by comparing the white and black regions of the output image.
1 citations
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26 Oct 1983TL;DR: The requirements imposed on codes useful in compacting laser scanned images are discussed and primary features of interest are compression ratio and its dependence on the type of image, processing capacity and speed required in coding and decoding, possibility of processing the coded data, and effects on the quality of the image.
Abstract: A high resolution laser scanner or recorder, used in the printing industry, will address a large number of pixels on a page, typically 108 - 101° pixels. The data rate will generally be about 10 Mbit/s. Processing, transmitting and storing such quantities of data gives emphasis on data compression techniques. Further, in many instances the compacted data can be more conveniently processed than the original pixel or run length format data. An example of this is the scaling of outline coded fonts and logotypes, and gray level coded photographs. We discuss in this paper the requirements imposed on codes useful in compacting laser scanned images. Primary features of interest are: compression ratio and its dependence on the type of image, processing capacity and speed required in coding and decoding, possibility of processing the coded data, and effects on the quality of the image. Some further points concern noise reduction, unfaithful coding techniques, origin of the coded images, and merging of data of different code structure. The problems created by the lack of standardization of graphics industry image coding are commented on and a comparison is made to telefacsimile codes. The coding problem is also addressed from the point of view of the extensive research carried out in the fields of image processing and image analysis. The research in high resolution image coding is seen to be at an early stage compared to the level of research in the fields of coding of television pictures, photograph images or low resolution facsimile.