SU1589300A1 - Device for determining coordinates of point light objects - Google Patents

Abstract

The invention relates to automation and computer technology and can be used in optical location, television automatic transmissions, astronavigation systems. The purpose of the invention is to improve the accuracy of the device by making it possible to change the number of lines and elements in a line. This is achieved by the additional introduction of three triggers, three AND elements, a comparator, two delay elements and an NAND element. The device contains a television sensor, a comparator, a memory unit, a display unit, two counters of forming the coordinate signals, two registers, four flip-flops, three AND elements, two delay elements, an NAND element and an NOT element. 5 il.

Description

The invention relates to automation and anti-extremes technology and can be used in optical location, television automata, astronavigation systems.

The purpose of the invention is to improve the accuracy of the device.

FIG. 1 is a block diagram of the device; in fig. 2 is a block diagram of a television sensor, an example of execution; in fig. 3 is a block diagram of a register, an example of execution; in fig. 4 is a block diagram of a memory block, an example of execution; in fig. 5 - timing charts of the device.

The device for determining the coordinates of the point light objects contains (Fig. 1) the first trigger 1, the first 2 and the second 3 registers, the first AND 4 element, the second trigger 5, the second And 6 element, the comparator 7, the AND-HE element 8, the third 9 and fourth JO triggers, the second delay element 11, the element NOT 12, the television sensor. 13, the third element I 14, the first delay element 15, the display unit 16, the memory block 17, the counter X-18 and the counter U-19. In addition, the device contains an input 20 Reset, output 21 K -. Search network, entry 22 Installation,. Input 23 Start, first group 24 information outputs of memory block 17 and group 25 information outputs. A television sensor 13 forms (FIG. 2) a driver 26, a matrix of photocell cells 27 on a charge-coupled device, an optical unit 28, a pulse generator 29, and a video amplifier 30,

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The sensor 13 has an output of 31 clock pulses, an output of 32 lower-case damping pulses, an output of 33 personnel damping pulses and a 34 B1 output of the sigal. The output of the video cooler 30 is connected to the output 34 of the video signal, the output of 32 lower-case damping pulses is connected to the first output pulse generator 29, the second output of which is connected to the output of 33 personnel quenching; impellers, the output of 31 clock km- I pulses connected to the output of the i-body 26, the group of outputs of which is soe - Idinena with the group of inputs of the matrix 27 I of photocells, the output which is connected: to the input video amplifier 30, a group: input of which is connected with the first group of generator 29 outputs momenta, a second group of outputs is connected to the output of the group 26,

Register registers 2 and 3 are identical. However, register 2 (FIG. 3) contains the first group of N flip-flops 35, and: register 3 is the second group of ns N-2 flip-flops 35, where N-2 is the number of CCD elements in the row of the photocell matrix, and the inputs for setting zero of the flip-flops 35 merged between co. the battle and connected to the input 36 of the installation of the zero register, the synchronization inputs of the trigger 35 are interconnected and connected to the register synchronization input 37, the direct output (1-1) of the first trigger 35 is connected to the information input of the 1st trigger (i 1, 2, ...), the information input of the first trigger 35 is connected to the information input 38 of the register. In the first register 2, the first informational output is the direct output 39 of the N-ro trigger 35 | 4, the inverse output 40 of which is the second information No. 1 register output, the third information output of which is the direct output (N-1) -ro trigger, and the fourth, fifth and sixth information outputs of the register 2 are respectively inverted outputs per- BOij-o, and the second (N-2) -ro 35 triggers the first group. In the second register 3, the first, second, and third information outputs are respectively the inverse outputs (N-4) -ro, (N-3) -ro, and (N-2) -th triggers 35 of the second group

The memory block 17 (FIG. 4) contains a decoder 41, a binary counter 42, two columns at the M memory nodes 43 (where

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M 0,) (s J, and N, taken equal to N-2 or N-1, respectively, with an even or odd value of N-2, similarly to S is taken to be S and: 1 and S + 1, respectively, with an even or odd value of S - the number rows in the photocell matrix 27), and each node 43 contains K triggers 44 (where K is the number of bits of the binary code of the address at the output of counters 18 and 19), the input will set the zero of the binary counter 42 and the inputs for setting the zeros of the triggers 44 are combined by itself and connected to the input 20 of the zero setting of the memory block 17, the direct outputs 25 of the triggers 44 are connected to the second the group of information outputs of the block., the first group of 24 information outputs of which is connected to the information outputs of binary counter 42 and the inputs of the decoder 41, the th output of which (t 1,2, ,,,,, M) is connected to the trigger synchronization inputs 44 t th row of memory nodes 43, block entry entry 45 is connected to counter input 42, informational inputs of px triggers (p 1, 2,. ,,, K) in each of the columns are interconnected and connected in the first column to the p-th input 46 of the first group of information inputs of the block, and in the second column - to the p-th input 47 the second group of informational inputs of the block,

The device works as follows.

The principle of operation of the device is based on searching and determining the coordinates of isolated point-like light objects in the process of scanning in rows of a matrix television image resulting at the output of a solid-state television sensor 13. The presence of a point-like light object in this image element corresponds to signal 1 at the output of the comparator 7, and its the absence of a signal O. During the scanning process, image windows are considered successively by the size of the elements, and if in the center of the window there is a point light about ekt, and his eight closest neighbors .net object, such tochechnsh light object is considered isolated,

In the television sensor 13, the image is projected by the lens of the optical unit 28 onto the matrix 27 of the CCD photoelectric cells, from the output of which an electrical signal is taken, proportional to the luminance of each photo; The photocell array 27 controls the signals produced by the driver 26, and the clock pulses (TH) are generated at the corresponding output. The pulse generator 29 forms, at the corresponding outputs, lowercase and vertical damping pulses (era and KP1) and special pulse sequences that are controlled by the driver 26 and the video amplifier 30, the output of which is a video signal.

In the initial state, the inputs 20 and 23 Reset and Start, exit 21 End of the search, the inverse output of the fourth trigger 10, as well as the outputs of the first element AND 4 and the elements AND-HE 8 have signals 1 i (the highest voltage level ). Before launching the device at output 22 Setting the control threshold of the comparator and to the input 20 Reset signal O (low voltage level) is given. To start the device, input 23 Start at time t (Fig. 5) gives signal O, from which the second flip-flop 5 sets the signal 1, KO.Tophii i is fed to the information input of the third ipnrrepa 9.- Frame blanking and myc from the output of the television sensor is fed to the input of the HE 12 element, where it is inverted, and from the output of the HE 12 comes to Synchronization input 1st and third trigger a 9, at the direct output of which signal 1 is set when the trailing edge of a personnel extinguishing pulse arrives,

The signal 1 from the direct input of the third flip-flop 9 is fed to the information input of the fourth flip-flop 10 and to the first input of the third element I 14, therefore the clock pulses from the clock output 31 of the television sensor 13 are transmitted to the third element And 14 (FIG. 5) and go to the synchronization inputs of the first trigger 1, the first 2 and second 3 shift registers,

From the output 34 of the video signals of the television sensor 13, the signal arrives at the information input of the comparator 7 If at time tj, (Fig. 5), the level of the de-signal at input 34 is greater than the threshold

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If the transmitter 1 is triggered at the input 22, then a pulse is formed at the output of the comparator 7. and at the output of the element LI-IE there is an 8-pulse O, from which a signal 1 is set at the direct output of the first trigger 1.

When the next clock pulse arrives from the output of the element-fta AND 14 to the synchronization input of the first trigger 1, the signal O is set at the direct output of the last, and the signal 1 is written to the first bit of the first register 2, the next clock pulses the signal 1 from the first bit register 2 is in the second, and in the first digit of register 2, a signal O is recorded (in the absence of a comparator 7 being triggered) or 1 (when a comparator 7 is triggered), etc. Thus, in the first register 2 the digitized current line of the image is memorized, and in the second 3 register - the next line of the image is digitized.

 If at time tj (FIG. 5) at the third output of the first register (direct output (N-1) -ro from the group of flip-flops 35), at the inverse output of the first flip-flop 1, at the second, fourth ,. the fifth and sixth outputs of the first register 2 shift (inverse outputs. respectively, the first, second if (N-2) -ro triggers 35 of the group) and the first, second and third outputs of the second register 3 shift (in inverse codes, respectively (N -4) -ro, (N-3) -ro and (N-2) -ro of group flip-flops 35) signal 1 is present, then the output of the second -H element 6 also sets signal 1, the duration of which is equal to the clock cycle t . The presence of signal 1 at the output of the second earth element 11 6 means that there is an isolated point light object on the image frame under consideration. Further, the signal I from the output of the second element I 6 is fed to the input 45 of the recording of the memory block 17, namely the counting input of the binary counter 42, the contents of which are sent to one. At the corresponding output of the decoder 41, signal 1 appears there, along the leading edge of which the binary codes of the X and Y coordinates of the point light object are recorded in 5 corresponding memory nodes 43. For example, the coordinates Xj and Y; The j-ro point-like light object is written into.

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nodes 43: and 43j4-i memories, respectively (where j is 1,3,5, .., 2М-1). It is obvious that the contents of c; the crescent 42 corresponds to the binary code of the number of point light objects that are in the image frame under consideration. A binary code of the number of detected point light objects is fed from the first group of 24 information outputs of the memory unit to the inputs of the display unit 16, where the received code is indicated

If, at time t (Fig. 5), the next common extinguishing pulse arrives, then the fourth trigger 10 switches over its leading edge and the signal O is set at its inverse output, which arrives at the input of the second delay element 11, the delay time of which is equal to the period About following horizontal damping pulses. Therefore, at time t, - (Fig, 5), at exit 21, the end of the search sets the signal O, the presence of which indicates that the search for point light objects in the given image frame is completed. Next, on the codes of the third 14 and first 4. elements, I also installs a signal O, from which at the direct output of the first 1. and second 5 triggers and direct outputs of the triggers 35 of the first and second groups, the signal O is set. pulse at the forward output of the third trigger 9 sets the signal O, since the information input of the third trigger 9 enters

signal O with direct output of the second

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When the leading edge of the next frame extinguishing pulse appears at time tg (Fig. 5), the inverse output of the fourth flip-flop 45 10 sets a signal 1, which is fed to the output 21 of the search through the second delaying element 11 and the output of the first And 4 set signal 1, jg

The signal at the first output of the first register 2 is shifted in time from the signal at the direct output of the first flip-flop 1 by an amount equal to С and N, and the signal is n, and the third output of the second register 3 is shifted in time from the signal at the first output of the first register 2 by a value equal to C g GD n (N-2),

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is played in the first binary counter 18, to the counting inputs of which clock pulses are received, and lowering damping pulses, i.e. the maximum number of pulses arriving at the clock input of the first counter 18 is N-2; and the content of counter 18 corresponds to the binary code of the X coordinate at a given time and is equal to the element number in the row of the Y coordinate of a point light object — is formed in the second binary counter 19, the counting inputs of which receive lower-case damping pulses, and the input of the zero setting receives personnel pulses, i.e. the contents of counter 19 corresponds to the Y coordinate and is equal to the line number. In this case, the magnitude of the pulse delay by the first delay element 15 is equal to the period of the lower-case outgoing pulses, since the central line in the window — the image of the size of the elements is shifted in time relative to the first line (counted from the top) by the value and the same value in the window image line relative to center line.

Claims (1)

Invention Formula A device for determining the coordinates of point light objects, comprising a television sensor, a memory block, first and second counters of X, Y coordinates, first and second registers and a trigger, characterized in that, in order to improve accuracy by providing the possibility of changing the number of rows and elements in the line, the first and second delay elements, the second, third and fourth triggers are entered into it, the first, second and third AND elements, the comparator, the NAND element and the NO element, the output of the first delay element are connected to the installation input zero zero The YJ coordinates of the counting input of which is connected to the output of the lower damping pulses of the television sensor and connected to the input of setting the zero coordinate counter X, the counting input of which is connected to the output of the clock pulses of the television sensor whose output of frame damping pulses is connected to the input of the first delay element, the input element NOT and input synh 1 The fourth trigger of the fourth trigger, whose information input input is combined with the first inputs of the third AND element and the NAND element and connected to the forward output of the third trigger, whose synchronization input is connected to the output of the NOT element, and the information input to the second exit of the second trigger, output the comparator is connected to the second input of the NAND element, the first input of which is combined with the input of the second delay element and connected to the inverse output of the fourth trigger, and the output of the second delay element is connected to the second input of the third element And is the control output of the device, the clock pulse of the television sensor is connected to the third in: the third element of the AND, the output of which is connected to the synchronization input of the first trigger, first and second registers, the forward output of the first trigger is connected to the information input of the first register, the group of information outputs of which is connected to the first group of inputs of the second element I, the second rpyima of inputs of which is connected to the group of information outputs of the second register, whose information input is The key to the output of the first register, a second output element Q. with ten The delay element is connected to the first input of the third element AND, the second input of which is combined with the installation inputs of the first, third, and fourth triggers, the first and second registers, and is the first control. the input of the device, the output of the third element I is connected to the input of the zero setting of the second trigger, the installation input of the unit of which is the second control input of the device, the multiplex output of the television sensor is connected to the information input of the comparator whose control input is the third control input of the device , the output of the element is NOT connected to the installation input of the unit. the first trigger, the information input of which is connected to the zero potential bus, the inverse output of the first trigger is connected to the input v And, the output of which is connected to the input of the memory block, the first group of information inputs of which is connected to the output group of the X coordinate counter, and the second group of information inputs to the output group of the Y counter, the output group of the Q-m unit is informational the output of the device, and the read input of the memory block is connected to the second input of the third element I., 0 five Fig.Z  IT f b b IT 4J. SG, t CO  e