Measuring the Geometric Parameters Using Image Proccessing and Diffractive Optics Methods

摘要

In this paper, we'll discuss the development of an approach to measuring the object parameters on the basis of image processing and diffractive optics methods. The paper is composed of two parts. In Part Ⅰ we'll examine a number of problems related to measuring the geometric parameters of diagnostic medical images derived via optical and X-ray techniques. These problems are concerned with measuring the geometric parameters of heart and retina blood vessels. Here, the original techniques and algorithms for tracing the blood vessels' tree, detecting vessel branches and measuring the vessel thickness are used. We shall also discuss methods for 3D tracing, that allow the 3D structural images of the vessel tree to be derived from X-ray angiographic images of projections. Part Ⅱ is devoted to the synthesis of multi-order dififractive optical elements (DOEs) matched to different orthogonal bases. These elements may be applied to spectral analysis by using the Bessel, Gauss-Laguerre and Gauss-Hermite modes; checking the aspherical surfaces by using the Zernike basis; the rotation-invariant light decomposition in terms of angular harmonics and functions comprising the angular harmonics; measuring the orbital angular momentum of rotating laser light fields.