A method of parallel-hierarchical transformation based on population coding is described and the use of this method for image recognition is considered. This parallel-hierarchical transformation is described as a system model for image recognition. Theoretical information, experimental investigations, and a software realization are presented.

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The operation of laser system based on explosively pumped photodissociation lasers and designed to control the distribution of space debris not observed nowadays is described and the possibility of its breaking using laser radiation effect and its subsequent evaporation in the Earth's atmosphere is discussed.At present, the problem of safety of spacecraft flights is rather urgent since space is filled by particles ofnatural and artificial origin (further called space debris).Fragments of more than 50 mm diameter can be observed by present-day radar and optical facilities, at that the use of astronomic facilities for observation of space debris is possible only at night and at twilight. Currently there are no similar facilities for observation of fragments with diameter of smaller than 50mm. Therefore there is no reliable model of spatial distribution of similar fragments dangerous for spacecrafts. Thus, effect from collision of spacecraft with fragment of 1 0mm diameter is equivalent to effect of explosion of lOOg of trinitrotoluene (highly explosive substance). Therefore it is necessary to observe and as far as possible to catalog fragments and in the future to remove them from dangerous orbits. Fig. 1 shows the schemes of two variants of laser system proposed for observation and removal of fragments. The system includes laser locator, targetilluminating laser based on the explosively pumped photodissociation laser (EPPL) [11, high-power laser based on EPPL with phase conjugation (PC) [2]. For proper work ofthe system it is necessary to arrange an angle reflector (AR) on the spacecraft.The system operates in the following manner. When the spacecraft appears in the field of view of laser radar, the latter begins to track it making measurements of its coordinates and range. These coordinates are used for correction of tracking by rotators of illuminating EPPL and EPPL with PC in such manner that the spacecraft would not go from the field ofview ofthese laser devices.At the favorable moment (the moment of weak influence of Doppler frequency shift of radiation reflected from the moving spacecraft) target-illuminating EPPL begins to operate and its radiation irradiates the spacecraft, and then laser radiation reflected from AR gets to input of EPPL with PC. The latter starts and sends input radiation precisely in the opposite direction with simultaneous amplification. As a result, focused and self-pointed high-power radiation of EPPL with PC reaches spacecraft orbit in that point where the angle reflector was before.In the first variant of laser system realization the spacecraft to that moment moved away from this point on the distance R= EL/c, where V -tangential component of spacecraft velocity, L -mean distance between the spacecraft and the system, c -velocity of light, for example, R= 16m, if = 8km/s , L=300km. SPIE Vol. 3574 . 0277-786X/98/$1O.OO 437 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 05/27/2015 Terms of Use: http://spiedl.org/terms

Multistage integration of visual information in the brain allows people to resFond quickly to most significant stimuli while preserving the ability to recognize small details in the image. Implementation of this principle in technical systems can lead to more efficient processing procedures. The multistage approach to image processing, described in this paper, comprises both main types of cortical multistage convergence. One of these types occurs within each visual pathway and the other between the pathways. This approach maps input images into a flexible hierarchy which reflects the complexity of the image dattL The multistage system higMights spatial regularities, which are passed through a number of transformational levels to generate a coded representation of the image which encapsulates, in a computer mam~r, structure on different hierarchical levels in the image. At each processing stage a single output result is computed to allow a very quick response from the systera, The result is represented as an activity pattern, which can be compared with previously computed patterns on the basis of the closest match.

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