00000nam 2200000za 4500 9.866564 CaOODSP 20221107162057 cr ||||||||||| 190103s1986 onc #ob f000 0 eng 0660122197 CaOODSP eng eng fre n-cn--- M38-13/86-4E-PDF M38-13/86-4E Petruk, W., 1930- Image analysis [electronic resource] : an overview of developments / W. Petruk. Ottawa : Mineral Sciences Laboratories, 1986. v, 5 p. CANMET report ; 86-4E "April 1986." Title from cover. Issued also in French under title: Analyse d'image : aperçu des réalisations. Includes bibliographical references. "Performing image analysis involves digitizing and analyzing an image to characterize the features in it. A few researchers use image analysis to solve specific problems by writing their own computer programs, but widespread usage requires the availability of commercial image analyzers. Manufacturers have built a wide variety of image analyzers whose price and capabilities vary by a large factor. All image analyzers consist of image input, image digitizing, image processing, and data output. The image input can be (i) a digitizer tablet on which an image is drawn with a special stylus; (ii) a TV camera for collecting an image from an optical microscope or an epidiascope; (iii) a SEM interface for collecting a SEM image; and (iv) an image from computer memory. Image processing varies from simple processing such as determining the area % of a specific phase, to measuring a wide variety of parameters for each feature, as well as determining the reflectance and transmittance of features observed with an optical microscope. Furthermore, the electron beam of a SEM can be steered to scan each feature and to identify the feature on the basis of its composition. Image analyzers, therefore, vary from the simplest one which uses a digitizer tablet and can perform only a few measurements such as area % and size analysis of the features, to a fully equipped one that can automatically identify all the phases in the image and characterize each feature by using a wide variety of parameters"--Abstract, p. i. Includes abstract in French. gccst Analysis gccst Research and development gccst Digitization Canada. Natural Resources Canada. Canada Centre for Mineral and Energy Technology. Mineral Sciences Laboratories (Canada) Analyse d'image (CaOODSP)9.866567 CANMET report ; 86-4E. (CaOODSP)9.852792 PDF 109 KB https://publications.gc.ca/collections/collection_2019/rncan-nrcan/m38-13/M38-13-86-4-eng.pdf