SU486712A1 - Sampling Device - Google Patents

Description

behind. All of these fields are projected onto the receiving screen of block 4, which converts the optical signals to electric. Block 4 can be built on the basis of photovoltaic arrays (such as photodiodes, factory trials, photoresistances) or a telvizovannaya transmitting tube. The output of the block Ka 4 is connected to the input of the classifier 5, which relates the original image to a specific class of images.

The block sowing rate: illuminator /, multiplier 2, block 3 of two-dimensional filters, block 4 of reading — functionally represents an image analyzer. Let us consider in more detail his work. An optical multiplier produces as many images identical to the original as the analysis fields used. The shape of the slits in the diaphragms and their orientations are determined by the type of local features of the image, highlighted on the corresponding fields. On fig. 2 shows examples of diaphragm types for distinguishing straight lines, arcs, angles and intersections. For you (the features of one type, but of different orientations, are used one: the seam diaphragms, but once turned one relation to another on the street, pa (the angle of change of the orientadi1 is the same. In Fig. 3, as an example, half azan diaphragms for separating oriented straight four-direction segments.In Fig. 4, the original image and image: Fig. 3 are shown on azalysis obtained with a half of the diaphragm / ragl shown in Fig. 3. The image on the analysis field is essentially the result of mutual QA) q qq or convolution q one of the reproduced images and images of the corresponding diaphragm. In figure 4 it is obvious that if there are local features in some places of the original image that match the ino form and orientation with the company and the orientation of this slot | I, then the corresponding places in the field in question an.alysis will be noticeably different

on illumination from other places on this field. A similar effect is also achieved for other co. values in binary are produced by simply comparing the analog signal with a threshold.

Correcting the analysis: the ator can be modified if a lens is installed between the plane of the diaphragms and the receiving screen. This design has greater flexibility and makes it easy to match the sizes of the analysis and receiving screen fields. To obtain the analysis fields, the receiving screen must be installed between the focal plane.

lens and image sharpness plane.

The main advantages of the proposed device are: greater functionality, increased recognition reliability,

architectural simplicity and the possibility of parallel processing of information, causing BbiiCOKoe speed.

F o r mule invented and

A pattern recognition device comprising an optically coupled illuminator and a breeder, a block of two-dimensional filters, a reading unit and a classifier, characterized in that, in order to extend the functionality of the device, to increase the recognition reliability, the block of two-dimensional filters is designed as a set of slit diaphragms having the shape and orientation of the selected local features of recognizable images, and the readout unit contains a set of photocell matrices, each of which is optically coupled to one of the slits s diaphragm.

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