دانلود گزارش کارورزی و کار آموزی

چکیده : 

This paper deals with the problem of extracting qualitative and quantitative information

from few tomographic projections of an object without reconstructing this object. It

focuses on the extraction of quantitative information, precisely the border perimeter

estimation for a convex set from horizontal and vertical projections. In the case of a multiple

reconstruction, lower and upper bounds for the perimeter are established. In the case of

a unique reconstruction, we give conditions and a method for constructing an inscribed

polygon in a convex set only from the convex-set projections. An inequality on border

perimeter is proved when a convex set is included in another one. The convergence of

the polygon perimeter, when the number of vertices increases, is established for such

polygons.