SU690509A1 - Graphic information readout device - Google Patents

Claims (2)

 . one . . The invention relates to the field of automation and compute the technology in particular to devices for reading graphic information, and can be used in systems for recognizing images formed by streams of lines. A device for reading graphic information comprising a source of light, a block of images, a television tube, a scan generator, a control generator of a scan generator, a video amplifier, a threshold, a digital device, an angler-code converter and a buffer memory are known. A disadvantage of the known device is it. low accuracy and low speed. It is also known that a device comprising an image scanning unit connected to a synchronization unit, a serially connected amplification unit, a threshold unit and a formation unit. pulses, a photoelectric conversion unit connected to a gain unit, and an image code generation unit 2. However, the known device does not have sufficiently high reliability of reading graphic information. The purpose of the invention is to eliminate this drawback, i.e. in improving the reliability of the device. The goal is achieved by the fact that it contains a light multiplier that is optically coupled to an image scanning unit, counters whose inputs are connected to pulse shaping and synchronization units, and the outputs are connected to an image code generation unit, and a filtering unit optically coupled to a multiplier of the light flux and with a block of photoelectric conversion ani. The drawing shows a block diagram of the proposed device. The device includes an image scanning unit 1 containing a node 2 for forming and rotating a light beam with a sync signal sensor, an information carrier node 3, an illuminator 4 and a drive 5, multiply. A multiplier for the luminous flux, a filtering unit 7 containing an array of coding masks 8, a block 9 a photoelectric conversion comprising a matrix of photodetectors 10, a gain unit 11 comprising an amplifier 12 according to the number of photoelectric conversion channels, a threshold unit. 13, comprising threshold elements of each channel, a pulse shaping unit 15, comprising a pulse shaper 16 of each channel, channel pulse counters 17, an image code generation block 18, and a synchronization block 19. The device works as follows. The luminous flux from the illuminator 4 enters the node 2, in which, using an appropriate diaphragm, its part is separated from the entire luminous flux in the form of a narrow strip (evolvent slots depending on the scan geometry adopted in this task. Angular movement of the diaphragm t, e, the angular displacement of the illuminating beam of a selected shape relative to the image placed in the node 3; At the time the illuminating beam passes the initial angular position in the node 2 of the block 1, a synchro signal is generated, which It is then fed to block 19. As the light beam of a given shape rotates at a constant angular velocity relative to the optical axis, at any given moment of time only part of the image is illuminated and arrives at the input of multiplier 6, limited by the configuration of the light beam section. breeder planes 6, where the encoding masks 8 of block 7 are set. Each mask has a transmittance of zero,. everywhere, except for a contour of a certain shape and width, Within the width of this contour, the transmittance of the mask is one. When the illumination beam rotates in each channel of the light multiplier 6, the input image will be scanned according to its geometry, the form of which is determined by the contour recorded on the mask and the shape of the rotating state illumination beam. The video signals generated at the outputs of the channel photodetectors 10 of block 9 recording the light distributions on the side of the channel masks will be the results of reading the input image along 1 channel paths and contain information on the intersection of the channel contours with the lines of the input image. The received video signals are amplified in amplifiers 12 of block 11 and fed to blocks 13 and 15, at the output of which the original video signal is converted into a sequence of square pulses, the presence of which indicates intersections of the contour recorded on the mask, with the lines of the input multi-loop image, Channel pulse counters 17 simultaneously provide information on the number of pulses in the pulse sequence of each channel, and therefore on the number of intersections of the contours forming the multi-contour images with ko tours recorded on masks. The intersection number of the input image contours with the channel contour is a sign of the input image. The image code is compiled in a separate code generation unit 18 based on the readings of the channel counters. The image code is then used in the digital computer for comparison with the codes stored in the memory in order to make decisions about the belonging of the input image to any class. Block 19 ensures the inclusion of channel counters at the moment when the signal from block 1 is supplied to it. The introduction of new structural links and blocks has significantly improved the reliability of reading graphic information. Claim device A graphic information reading device comprising an image scanning unit connected to a synchronization unit, a gain unit connected in series, a threshold unit and a pulse shaping unit, a photoelectric conversion unit connected to the gain unit, and an image code generating unit characterized in that in order to increase the reliability of the device, it contains a multiplier of the luminous flux optically associated with the image scanning unit, the counters whose inputs oedineny with pulse shaping units and synchronization, and outputs connected to the image forming unit code, and the filtering unit optically coupled to the breeder luminous flux and photoelectric conversion unit. Sources of information taken into account in examination 1, USSR Copyright Certificate 251961, Cl, G 06 K 9/00, 1969, 2, US Patent No. 3944978, Cl, 340.3, published. 1976. 690509