SU947884A1 - Graphic information reading-out device - Google Patents

Description

The invention relates to automation and computing and can be used in information retrieval systems as a means of reading h, graphic and graphic information from a microfilm for transferring it to a display device.

Apparatus for reading information from a mic is known, comprising a CRT, line and frame counters, a memory block and logic elements 1.

In these devices, the structure of the drawing is not taken into account when reading, and a trace scan is used for reading, which leads to a low reduction of information redundancy, increases the time for reading and transmitting information over communication channels, and complicates readable and receiving and transmitting equipment.

The closest to the present invention is a device for reading graphic information containing blocks of deflection of the beam in X and Y coordinates, connected to a cathode ray tube of a logic unit, switching units of the X and Y channels connected to the units of deflection of the beam in X and Y coordinates and connected in series through the trigger of the formation of the raster with the logical block, the counter of the camo cad, connected with each other and with the logical block, with the block of aggregation of the channel X connected to the counter of the formation of lines, and the block ommutatsii Y channel is connected to the frame counter form, a memory, soedi10 nennuyu forming frame with a counter, clock 1gmpulsov, analyzing unit thickness of lines associated with the logical unit, wherein the clock gene Rhatore connected

5 to the logical unit and through the first element AND and the second element I connected in series to the line thickness analysis unit, the video signal shaping unit connected to the second AND element, as well as the blocks providing the tracking p1

A disadvantage of the known device is the large redundancy of the read information, and the use of

25 tracking mode, which increases the read time and complicates the device.

The purpose of the invention is to reduce the redundancy of the read information and

30 increase speed. The goal is achieved by the fact that the device containing the beam deflection units in coordinates X V5 Y, connected to the electron beam tube, whose inputs are connected to the outputs of the switching units of channels X and Y, trigger the formation of the raster, the outputs of which are connected to the inputs of the switching units of channels X and Y, and the input is connected to the logical unit, interconnected row forming counter and the framing counter, the output of the row forming counter is connected to other inputs of the switching unit (channel X, and the input to the logical block the first output of the framing counter is connected to other inputs of the switching unit of the channel U, the second output is connected to the input of the memory unit, the first input of the framing counter is connected to the logic unit, and the second input is connected to the output of the memory unit, the line thickness analysis unit the output of which is connected to the logic unit, and the input to the output of the first element I, the first input of which is connected to the output of the second element I, and the second input to the first output of the video signal conditioning unit, the first input of the second element I connected to the logic unit, and second input — with the first output of the clock pulse generator; the second output of which is connected to the logic unit; delay elements are introduced, the outputs of which are connected to the inputs of the frame formation counter and the logical unit; the third element AND whose output is connected to the inputs of the delay elements and the input of the counter of the formation of karov, and the first input of the third element I is connected to the third output of the clock generator, the trigger of the formation of search strings, the output of which is connected to the second input of the third element I, the first one trigger of the formation of search lines is connected to the logic unit, and the second input is connected to the output of the delay element, a counter of the number of lines connected to the logical unit and the second output of the video signal conditioning unit, and a serially connected calculator and interface unit that is connected to the logical unit, a counter for the number of lines and for a framing counter. The drawing shows a block diagram of the proposed device. The device contains a logical unit 1, a frame formation counter 2, a row generation counter 3, a channel switching unit 4, a channel switching unit 5, a beam deflection unit 6 along the X coordinate, a beam deflection unit 7 along the Y coordinate, electron beam tube 8, trigger 9 raster formation, clock pulse generator Yu, search lines generation trigger 11, third element 12, delay elements 13, video signal generation unit 14, first 15 and second 16 elements H, line thickness analysis unit 17, count of lines 18, block 19 conjug numerator 20 having two memory blocks X and Y memory 21, logic unit 1 is a control Mealy automaton with rigid logic shown in the table unit transitions.

in X.

V. 6 A logical block is designed using well-known control algorithms for the synthesis of control automata. In describing the operation of the device, signals from the table of the transitions are used, fully revealing the functioning of the logic unit. The device works as follows. In the first mode of analyzing the density of the lines of the drawing across the frame field, the turn on signal 3 enters logic block 1, which goes to state a and sets the trigger to 1 trigger 11 to form search strings / - feeds the input 1 of the second element I 16. Signal The generator 10 clock pulses passes through the third element I 12 and p adds 1 to the lighter discharge of counter 2 of the frame formation, and also through the elements 13t of delay it adds successively 1 higher bits of this counter so that after the end of the carries the e 2 counter increased by a number equal to the distance between Polska E strings. The signal X from the last delay element also enters logic block 1 and sets in O a trigger 11 to form search lines. According to this signal, logic block 1 enters the state a ,, and the signals Y. and permits filling of the counter 3 to form lines from the generator 10 clock pulses. A horizontal search line is being read. When the video signal appears, the video signal shaping unit 14 through the first element H 15 enables the operation of the line thickness analysis unit 17, with the pulses passing from the generator 10 clock pulses through the second 16 and the first 15 elements I.

Claims (2)

Continuation of the table If the line thickness is more acceptable, then the line thickness analysis block 17 outputs C) X, into logic block 1, which enters state a and the ultrasonic signal embraces the row formation counter 3, line thickness analysis block 17, the count counter 18 lines, and also adds 2 to the contents of the framing counter 2. This means that the search line falls on the line of the drawing and moves along it, so a new line is selected, spaced 2 from the previous one, and the next beat reads the new search line. If the thickness of the line is within the allowable range, then 1 is added to the content of the number of lines counter 18 on the opposite front of the video signal and the content of the line thickness analysis unit 17 is zeroed. After reading the search line is completed, the overflow signal X-, the line forming counter 3 enters logic block 1 and sets it to state a, the output signal from logical block 1 gives permission to write the contents of line number counter 18, and frame counter 2 through the block 19, the interfaces to the transmitter 20 and the comparison of the number of lines with the contents of the corresponding cells of the memory block U of the transmitter. After comparing, the numbers with their coordinates are written to the memory block Y of the calculator 20, in decreasing order. At the end of the operation, the calculator sends a signal X to logic unit 1. It translates logic unit 1 to state a with output signal X (. The signal Hu overflows the counter 18 of the number of lines to logical unit 1, which goes to state a with output signals Y (and Y, the latter writes the coordinate of the search line to the first cell of the memory block Y of the calculator 20. Parameter Xg of the overflow of the frame forming counter 2 receives the logic block 1, which passes the state a with the output signal Y Turns on the raster generation trigger 9, zeroes the framing counter 2 and row generation counter 3, signals the evaluator 20 to use the memory block X of the calculator. Switching the trigger 9 causes the switching blocks of the channels K and Ud- to switch and, in connection with this, to the redistribution of codes coming from the counter 2 forimage and frames from the counter 3 forming lines into blocks 6 and 7 of the beam deflection along the X and Y coordinates. After connecting the memory block X to the transmitter, the conjugation block 19 outputs block 1 signal X, which translates block 1 into state a, 2 with output signal Y. As a result, vertical search strings begin to be read. After using the memory block X of the calculator, the block 19 of the conjugation outputs to block 1 a signal X, which transfers block 1 to the state a-, preparing for the second mode with the output signal Yy. By this signal the counters 2 and 3 are reset. , counter 18, block 19, feeds O and trigger 11 to form search strings, feeds from 1 to trigger 9 to form a raster, connects memory block Y to calculator 20, As a result of the device operating in the first mode, n coordinates of the coordinates of Y are determined, which run down in descending order of crossing lines according to stvuyuschie units 20 memory calculator. The second mode of operation of the device is implemented as follows. Signal Rz. switching on the second mode of operation of the device enters the logic unit 1 and transfers it to the state ag with the output signal Hm. Logic block 1 by the signal Od permits the recording of the coordinates from the first cell, the memory block Y of the computer 20 to the counter 2 of the frame formation. After the end of the recording (the signal Hd of the conjugation block J, the logical block 1 enters the state a and the control signal 5f permits the arrival of pulses from the generator of 10 clock pulses to the counter 3 of line generation. When the video signal appears, the block 1 analyzing only 1: 1 lines does not The return front of the video signal X- | p adds 1 to the contents of the counter 18 of the number of lines and puts the logic block 1 into the state, which sequentially implements the following operations: with a control signal, U overwrites the contents of counter 2 This frame is stored in memory 21, with the signal U enters the contents of counter 3, the lines in counter 2 are framed, the signal takes 1 out of counter 2, the frames are generated and switches the trigger of formation of the raster 9, the signal of the RO adds to fill the counter with 3 lines forming from clock generator 10 A vertical line is read with a horizontal coordinate of the video signal. The overflow signal of counter 3 forming line X is fed to logic block 1, which goes into state a and a succession Enables the following operation: a signal adds 1 to the contents of the framing counter 2; switches the raster shaping trigger 9; by a signal U rewrites the contents of the counter 2 into the counter 3; with a signal, overwrites the contents of memory 21 into stricher 2, with a signal Y enables the filling of counter 3 to form a line from the generator of 10 clock pulses. After these operations are completed, a horizontal search string is read. The overflow of the counter 18 of the number of lines by the signal transfers the logic unit 1 to the state a which switches the raster trigger 9 with a signal Y and gives a signal to the interface unit 19 to use the memory block X of the transmitter 20. The conjugation block 19 B1 gives the signal X, which transfers the logic block 1 to the state a with the control signal ad. After using the memory block X, the interface block generates a signal Hy, which transfers unit 1 to the state of preparation for the third mode with the control signal Yj. 3 as a result of the operation of the device in the second reading mode, the number of vertical and horizontal lines determined by the counter 18 of the number of lines, sufficient to recognize the drawing. The third mode of operation of the device is initiated by the I signal Pj, which transfers the logic unit 1 to the state a with the control signal, by which 1 is added to the high order of the counter 2 of the frame and the next clock enables the reading of the line with the coordinate 1000. .0. After filling the line 3 fdrmirovaniya line overflow signal translates the logic unit 1 in the state control signal Y ,. 3, the result is added to the most significant bit of counter 2 again, and the row with the coordinate 0100.,. 0 is read. This is how the drawing is read in discrete rasters before the framing counter 2 is formed or before the signal is turned off. The signal for filling the counter 2 of forming the frame Xf, transfers the logical block 1 to the state a with the output signal Y; . On a signal, the device is turned off. In the proposed device, prior to reading, an automatic analysis of the density of placement of lines of the drawing is performed using a trigger forming search lines, the third element I, a counter for the number of lines of the calculator s / m memory blocks and a matching unit i 1. As a result of this analysis, the reading lines are located in places of the greatest information density of the drawing. When the device is in operation, the reading lines are not evenly distributed across the frame field, but at the intersections of the search line with the drawing line, which makes it possible to use the statistical features of the drawings and increase the degree of reduction of information redundancy when reading. The use of the proposed device makes it possible to increase the speed of reading information by a factor of 2-3 and to reduce the load on the communication channel by a factor of 1.5-2 as a result of the reduction. Redundancy of transmitted information. Formula of the invention. A device for reading graphic information containing blocks from the beam cloning along the X and Y coordinates, connected to an electron-beam tube, whose inputs are connected to the outputs of the X and Y switching units, and the formation trigger whose outputs are connected. from the input 1I of the switching units of channels X and Y, and the input to the logical unit, the row formation counter connected to the frame formation counter, the output of the string formation counter connected to other inputs of the switching unit The X channel and the input are connected to the logical unit, the first output of the frame formation counter is connected to other inputs of the switching unit of the channel U, and the second output is connected to the input of the memory unit, the first input of the frame formation counter is connected to the logical block, and the second input is the output of the memory unit, the unit of line thickness expansion, the output of which is connected to the logic unit, and the input with the output of the first element And, the first input of which is connected to the output of the second element And And, and the second input with the first output of the video signal forming unit, the first input the second About the element I is connected to the logic unit, and the second input to the first output of the clock pulse generator, the second output of which is connected to the logic unit, is indicated by the fact that, in order to increase the speed of the device, the delay elements, the KOTOFftix outputs are connected to the inputs of the framing counter and to the logic unit, the third And element, the output of which is connected to the inputs of the cage elements and to the input of the framing counter, and the first input of the third H element to the third output of the clock generator the output pulses, the trigger line of the search strings, the output of which is connected to the second input of the third element AND, the first input of the trigger for forming search lines is connected to the logical unit, and the second input to the output of the delay element, the number of lines counter connected to the logical unit and. with the second output of the video signal conditioning unit, and the serially connected calculator and interface unit, which is connected to the logic unit, the number of lines counter and the framing counter. Sources of information taken into account in the examination 1.Grishin MP and others. Automatic input and processing of photographic images on computer. M., Energia 1976 .. 2. Authors certificate of the USSR 541184, cl. G On K 11 / 00,1976 (prototype). .