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Blurring effect

Under this definition, the E function is characterized by an experimental 5 factor, which can be estimated experimentally (Saad et al, 2001). Note that the cumulative B factor applied in the final reconstruction is a composite of experimental and computational causes. The computational B factor is attributable to additional blurring effects such as inaccuracy in determining the orientation of particles, which could also be described by a Gaussian function type. The dampening of the image contrast by the... [Pg.96]

Figure 4.1. Principle of backprojection in image reconstruction, (a) An object with two hot spots (solid spheres) is viewed at three projection angles (at 120° angle) and the acquired data are backprojected for image reconstruction (b) When many views are obtained, the reconstructed image represents the activity distribution with hot spots, but the activity is blurred around the spots (c) Blurring effect described by 1 /r function, where r is the distance away from the central point. (Reprinted with the permission of The Cleveland Clinic Center for Medical Art Photography 2009. All Rights Reserved)... Figure 4.1. Principle of backprojection in image reconstruction, (a) An object with two hot spots (solid spheres) is viewed at three projection angles (at 120° angle) and the acquired data are backprojected for image reconstruction (b) When many views are obtained, the reconstructed image represents the activity distribution with hot spots, but the activity is blurred around the spots (c) Blurring effect described by 1 /r function, where r is the distance away from the central point. (Reprinted with the permission of The Cleveland Clinic Center for Medical Art Photography 2009. All Rights Reserved)...
The difficulty of experimental determination of atomic radii comes from several reasons, mainly the blurring effect of thermal vibrations of atoms and the extreme complexity of theoretical interpretation of the experimental data [204]. Johnson [205, 206] noted that electron density of an atom in a metallic structure shows a... [Pg.31]

In this case, microscopic tendrils of dye appear at the edge of the dot giving it and the overall print quality a blurred effect. This is particularly serious in the case of text printing, which benefits most from sharp dot edges. Feathering is common for papers used in xerographic copiers. Bond paper, which is a popular office stock, is a partially coated paper and exhibits little feathering. [Pg.2154]

The vast majority of ophthalmic ointments are essentially lipophilic and consist of mixtures of hydrocarbons. To improve spreading over the comeal surface and mixing with the precorneal him. small amount.s of lanolin and/or lanolin alcohols, impaning to the ointment base W/0 emulsifying properties, can be added. Suspension-type hydrocarbon ointments share with their "solution-type" homologs a poor patient acceptance, mostly due to their greasiness and vi.sion-blurring effect therefore, they are preferentially applied as nocturnal medications. [Pg.312]

Flow Blue. A deep cobalt blue which was used for under-glaze printing on pottery. As the name indicates, the colour tended to flow into the glaze, giving a blurred effect this result was obtained by placing flow powder... [Pg.126]

Ultimate Resolution. The flnal disk of confusion due to the different nonmechanical blurring effects is given appuo.ximately by... [Pg.1093]

Fig. 4. SmaU aperture (left) exhibits translucent blurring effect, whereas large aperture compared to illumination area (right) eliminates error caused by this effect. Fig. 4. SmaU aperture (left) exhibits translucent blurring effect, whereas large aperture compared to illumination area (right) eliminates error caused by this effect.
Hsia, J. J. (1976). Optical Radiation—The Translucent Blurring Effect—Method of Evaluation and Estimation, N.I.S.T. Technical Note No. 594-12. U.S. Government Printing Office, Washington, DC. The analysis of the translucent blurring ectledge-lossfor ceramics and... [Pg.266]

Fillinger, L., Lukacs, G., and Endor, G. (1978). Thermochromism of color standards. Hun. Sci. Instr. 44, 25 Fairchild, M. D., and Grum, F. (1985). The thermochromic properties of ceramic reference tiles. Appl. Optics 24, 3432 and Verrill, J. F., Knee, P. C., and O HaDoran, J. (1995). A study of the uniformity and thermochromism of surface colour standards. Abstract of paper presented at C.I.E. International Meeting, Berlin. Recent studies erf surface uniformity and thermochromism of currently used color standards [translucent blurring effect). [Pg.268]


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Blurring

Translucent blurring effect

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