SU1024947A1 - Device for reading graphic information - Google Patents

Description

The invention relates to an automatic and computer technology, s to devices for reading graphic information for the purpose of its input into a computer. There are known devices for reading graphic information containing a transmitting television tube connected in series with | With a video amplifier, a delay element, a video gating unit and a conjugation unit, an amplitude limiting unit, connected to a frequency generator and a video gating unit fll. Such devices have a relatively low accuracy of reading graphic information. The closest in technical essence to the present invention is a device comprising a transmitted television tube connected to a line and frame scanner block and through an analog-to-digital converter with an AND element connected to the first decoder a first pulse counter connected to a clock generator and a block line scan, the second pulse counter, connected to the frame scanner unit and to the first pulse counter, and the second decoder, line and frame counter, connected to the first AND I a decoder eye, respectively, and a comparison unit, the inputs of which are connected to the first and second counters of pulses, counters of rows and frames, and the output is connected to the first and second decoders and row counters in series, and a computer communication unit connected to the equipments the second decoder of the AND; counters H. The disadvantage of & and the known device is that it does not provide the possibility of selectively reading half-tone images with different optical density. The purpose of the invention is to expand the field of application by allowing the selective combination of half-tone images; times the optical density. This goal is achieved by the fact that the device contains a transmitting, television tube, the inputs of which are connected to the outputs of the horizontal and vertical scanning units, whose inputs are connected respectively to the outputs of the first and second counters connected in series, and the input of the first counter is connected to the output of the clock pulse generator ow, element I, the first decoder, the row counters, the second decoder and the frame counter, a comparison unit, the inputs of which are connected to the outputs of the first and the second counter c, the row counter and the frame counter, and the output to the input of the first decoder, and a computer communication unit, one of the control outputs of which is connected to the installation inputs of the second decoder, row counter and frame counter, contains an optical image density analyzer, a block of elements And the functional converter, the input of which is connected to the output of the transmitting television tube, and the output - to the input of the analog-digital converter, the output of which is connected to the information inputs of the optical density analyzer from raznya and block elements And, the control input of which is connected to the output of the element And, the inputs of which are Connected respectively to the outputs of the comparison unit and the optical image density analyzer, and the control input of the analyzer optical image density connected to another / control output of the communication unit with a computer , FIG. 1 shows a block diagram of the proposed device for reading graphic information; FIG. 2 is a diagram of a functional converter / FIG. The functional diagram of a code analyzer (optical image density. A device for reading graphic information (FIG. 1) contains a transmitting television tube 1, an analog-to-digital converter 2, element 3, blocks 4 and 5 lowercase and personnel (digital sweeps, first and second counters b and 7. pulses, 8 clock pulse generator, comparison block 9, 10 and 11 rows and frames counters, first and second decoders 12 and 13, computer block 14, functional converter 15 analyzer 16 optical image density and unit 17 of elements I. Functional converter 15 (FIG. 2) contains a logarithmic amplifier 18 connected to the input of a functional conversion unit, a source 19 of a reference voltage and an adder 20 connected by inputs to a logarithmic amplifier 18 and The source of the Reference voltage 19 and the output is with the output of the functional converter. The optical density analyzer 16 of the image (Fig. 3) contains a comparison circuit 21, connected with the inputs of the analyzer 16, and outputs with an OR element 22 to the switch 23 connected to the outputs of the comparison circuit 21 and the output of the OR element 22, the output of the switch 23 is connected to the output of the optical image analyzer 16 . The device works as follows. The clock pulses from the output of the generator 8 arrive at the counting input of the first pulse counter b, the overflow pulse of which goes to the counting second pulse counter 7, frame sweep. On the bit outputs of the counters 6 and 7 of the pulses, the current coordinate codes are continuously generated, which enter the blocks 4.5 digital sweeps are converted into deflection-beam current of the transmitting television tube 1. The computer-communication unit 14 uses the program to issue a command containing the line number code and the code, the number of the decomposition element of the line from which on the need to start reading information. This code is recorded in the 10 and 11 line and frame counters. In addition, block 14 issues a command containing the code for the step of reading the elements of the line and the step of reading the lines. This code is fed to the bit inputs of the first 12 and second 13 decoders. The specified code of the iCO line number of the 11-frame counter and the code of the selected line element from the 10-line counter are fed to the inputs of comparison unit 9 simultaneously with the other inputs of the comparison block 9, the current coordinate codes from the first and second counters b and 7 horizontal and frame sweeps are received. When the current and given coordinates coincide in block 9 of the comparison, a coincidence signal arises, which is fed to the first input of the element IZ. The comparison signal with a certain delay enters the control panel inputs of the decoder 12. The optical image to be read and entered into the computer is transformed by the transmitting television tube 1 into a video signal, which then goes to the input of the functional converter 15, which is based on, for example, the pr method. At the reference point I, the conversion of the transmittance T to the value of optical density D is performed using a logarithmic amplifier 15, at the input of which a video signal is applied. The output voltage of the logarithmic amplifier is 18, taking into account the fact that

where C is the transmitting sensitivity

TV tube 1} F - the luminous flux illuminator

When switch 23 is set to position 24 in block 14, the transmission of the optical density code D is allowed — the optical density is described by the equation Jebix koUg D Q.-D.I), where K is the gain in linear mode Olu is the initial voltage of the logarithmic part of the plot. In order for the output signal of the functional converter 15 to be proportional to the measured density, the voltage OgblX of the adder 20 adds to the voltage of the source 19 of the reference voltage ((T) "a, + O, and the output voltage of the functional converter 15 determines expression Vx o ft. The voltage from the output of the functional converter 15 is fed to the input of the analog-digital converter 2, where it is converted into the corresponding optical density code, which is unitary output from the output; the analog-digital converter 2 inputs At the input of the analyzer 16, the optical density of the image, and, in the form of a parallel code, is transmitted to the second inputs of the block 17 of the elements And, the analyzed code of the optical density of the read element. The image enters the turn (Y at the input of the comparison circuit 21). the program issues a command containing the specified optical density code / field tolerance code of the compared numbers and the setting signal of the transmitted KOROS to the corresponding registers of the switch 21. comparison; In comparison process; received from the English-digital,: converter 2 of the optical density code A with the optical density code B, specified by block 14, at the output of the comparison circuit 21, vol. Signals are More (KJB) Equivalent. but (AaB), Less (). The signals from the outputs of the circuit 21 avg & vnie come to the inputs 24-26 of the switch 23 (FIG. 3. And to the inputs of the element OR 22, the output of which is connected to the switch 27 of the switch 23. From the output 28 of the switch 23 the corresponding signal is More (A7B ;, Equals (A "B), Less (receives the & second input of the element AND 3) The signal from the output of the element AND 3 goes to the first inputs of the block 17 of the elements AND, allowing J to the optical density code in block 14, A whose magnitude is greater than (AB) taking into account the field of tolerance, the code of the density of density By specified by the block 14,. /.:, when installing the switch; 23 in by The provision 25 in block 14 resolves the transmission of an optical density code A, the value of which is (), - "taking into account the field tolerance of the optical density code B specified by {block 14," When the switch 23 is set to position 26 in block 14, the transmission of the optical density code is permitted A, the value of which is less than / (, taking into account the gender of the tolerance, the code of optical {density B, specified by block 14, -, - - ..:., ...; -.,: .... -: When installing the switch 23 in / position 27 in block 14, the transmission of the optical density code A of the read element, 1 graphic image, tive of sho is (), or (He otnrsited no optical 1lotnosti code B, given by Bloch. K6rtl4,. . . : ,, ,, ..,. ::: ./- :, - When a signal from the output of the comparison block 9 arrives at the control input of the decoder 12, pulse commands are formed at its outburst, move the counter -10 lines. The next element of the string is shifted With a settling in the count of 10 tcp ordinates of the next element, row, the operation of the device is repeated and; continues until the pulses are received: Ley6sa counter 10 lines, cat; oo nocTyriaibT At the control input of the second decoder 13. At the output of this decoder, pulse commands occur that shift the counter 111 frames to the next selected {1n line; and the transfer of the new line information starts. This mode of operation is terminated with the receipt of the exchange command. Introduction of a functional converter, optical image density analyzer, a block of elements -I and corresponding communication constructions expands the area of application of the device by selectively entering into the computer elements of a readable image with a specific code. Optic raftHQCtH:, -. :. ,,. , The processing of X-ray spec. The radiologist-radiologist is often interested in only areas that are pathological changes. Expert review of radiographic chest cells shows that for a snapshot of 240x300 mm, the area with pathological changes is no more than 130x130 mm (23-25% of the total snapshot area),. I. -. . v, .... ...,,; /. .... one , . . , .. .1, The use of a selective half-tone image in an E1BM with a perfect optical P6T1 | awn allows only enter interesuyu-, uwe spesh1alista rentgenolga tsrlutovovOgo-image area does not reduce Metier, than in 13 times the volume injected .informatsii time computer processing machine, such as ttiljiefleHRH image region bounded koHtypoM, computation les E koOryynat center opredeLeiii tysschadi , pericutra lengths, inertia moments of the form coefficient.

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Claims (1)

DEVICE FOR READING GRAPHIC INFORMATION; comprising a transmitting television tube, the inputs of which are connected to the outputs of the horizontal and vertical units, the inputs of which are connected respectively to the outputs of the first and second counters connected in series, the input of the First counter connected to the output of the clock generator, element I, the first decoder connected in series , counter, lines, second decoder and 'counter-frames ,. block H comparison, the input of which is connected! , with the outputs of the first and second counts of ^1. * chicks, line counter and counter ' ⁵ * ·. V M 'frames, and out output - to an input of first decoder, and a communication unit with a computer, one of the' control outputs ¹ koto- cerned are connected to inputs of the second mounting; decoder, line counter and frame counter, from l. moreover, in order to expand the scope of application by enabling the selective reading of grayscale images (of various optical densities, the ano contains an analyzer which is connected to the output of the transmitting television tube, and the output to the input of an analog-to-digital converter, the outputs of which are connected to the information inputs of the analyzer of optical image density and the block of elements * the null input of which is connected to the output of the And element, whose inputs are respectively connected to the outputs of the comparison unit and the Optical Image Density analyzer, and the control input! of the optical density analyzer ....................................... © images connected to another control4 · ^ With 4 ^ " By the mating output of a communication unit with a computer.