The article deals with the features of the design of helmet displays. Features of individual elements and requirements for some of them. One of the most important aberrations that should be taken into account when designing such systems, un centered distortion, some moments of modeling distortion and ways of its compensation are also considered.
Development of a parametric model of an optical system consisting of 2 and 3 reflective surfaces and its analysis are considered in this paper. The construction of a parametric model is necessary to simplify the initial stage of designing optical systems. The basis of the parametric model is built by replacing reflective surfaces on thin components equivalent, in which a three-mirror system can be written using an external virtual axis angles (zero) beam with the optical axis. To solve the problem of minimizing aberrations, the theory of third-order aberrations developed by Professor G.G.Slyusarev is used. As a result of working is a universal equation, describing the entire variety of optical systems of three thin mirror components forming a flat image, the design parameters of which depend on the 3 coefficients that enter the equation. The use of the obtained parametric model of an optical system consisting of 3 reflecting surfaces makes it possible to simplify the stage of the initial synthesis of mirror optical systems and to obtain an initial version of a system free from spherical aberration, coma, astigmatism and curvature of the image.
The article deals with the features of the design of helmet displays. Features of individual elements and requirements for some of them. One of the most important aberrations that should be taken into account when designing such systems, un-centered distortion, some moments of modeling distortion and ways of its compensation are also considered.
The theoretical basis for the mirror high-aperture optical system synthesis, based on the properties of the reflecting surface accepted as the base having a shape of a paraboloid of rotation are considered in the work Design parameters and residual aberrations tables of the few design solutions for considered optical systems are presented. From the analysis of aberration correction of the image formed by the considered optical system, it follows that the angular value image space is limited, primarily, the image surface curvature. To compensate for curvature of the image surface can be applied Smith lens. The additional condition that determines a high aperture ratio of the optical system of the considered lens as a whole was introduced, but it complicates the process of correcting the aberrations of a wide beam of rays. It is shown that the use of afocal Mersenne system with known anaberration properties, allows you to build a series of compact and SLR mirror-lens systems with aplanatic, anastigmatic and plananastigmatic aberration correction formed the image, at the same time the length of the system is about four times smaller than the diameter of its entrance pupil. Importantly, when applying the lens for using in a long wavelength range emission, the requirements for aberration correction image formed by the lens are reduced, and accordingly, manufacturability are increases.
Features of program realization of algorithms of segmentation when developing the software for detecting and maintenance of objects on the stream video image are considered in this article. The special attention is paid to the choice of the using of algorithm of segmentation and realization of the qualifier which finds required object on the image, on the basis of Haar's cascades. The main algorithms which are basic when developing the software and examples of work of the program are given.
The article deals with the methods of image segmentation based on color space conversion, and allow the most efficient way to carry out the detection of a single color in a complex background and lighting, as well as detection of objects on a homogeneous background. The results of the analysis of segmentation algorithms of this type, the possibility of their implementation for creating software. The implemented algorithm is very time-consuming counting, making it a limited application for the analysis of the video, however, it allows us to solve the problem of analysis of objects in the image if there is no dictionary of images and knowledge bases, as well as the problem of choosing the optimal parameters of the frame quantization for video analysis.
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