SU1688265A1 - Picture digitizer - Google Patents

Abstract

The invention relates to automation and computing and can be used to read images of objects. The purpose of the invention is improving speed. A device for reading the contours of image objects comprising an image sensor, a control unit, the first and second memory blocks, the first counter and the computer interface unit includes a threshold element, an OR element, the first and second counters, and the first and second elements EXCLUSIVE OR. The output-video signal of the sensor is connected to the input of the threshold element, the output of horizontal damping pulses is connected to the counting input of the first counter and the control input of the control unit, the output clock of the image sensor is connected to the counting input of the second counter and the clock input of the control unit. In this case, the computer interface unit contains a control signal generator, a resolution signal conditioner, a counter, and a buffer memory, the information output, the course of which is the output of the device. 1 hp f-ly, 1 ill. SS (L

Description

The invention relates to automation and computing and can be used for reading. images of objects located in the working area of an industrial robot in the automation of production processes.

The purpose of the invention is to increase the speed of the device.

The drawing shows a block diagram of the proposed device.

The device contains an image sensor 1, a threshold element 2, a first mono-vibration 3, a second one-vibration

.4, first 5 and second 6 elements EXCLUSIVE OR, first memory block 7, element OR 8, control signal generator 9, second memory block 10, first counter 11, resolution signal generator 2, second counter 13, block 14 control, buffer memory 15 and counter 16.

The driver 9 of the control signals, the driver 12 of the enable signal, the buffer memory 15 and the counter 16 are included in the block 17 of the interface and with the computer (circled in dashed line).

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The video output from the image sensor 1 is connected to the input of the threshold element 2, the output of which is connected to the trigger inputs of the 3 and 4 modules.

The output of the one-shot 3 is connected to one of the inputs of the EXCLUSIVE OR elements 5 and 6 and the third control input of the first memory block 7.

The output of the second oscillator 4 is connected to another input of the EXCLUSIVE OR element 5, which is connected to the input of the OR element 8, the output of the element 6 is connected to the second input of the element 8, the output of which is connected to the input of the former 9. The output of the first memory block 7 is connected to the first control the input of the second memory block 10, the output of which is connected to the input of the element 6P, the output of frame damping pulses of the sensor 1 is connected to the inputs of the counter 11 and the resolver 12, the output connected to the input of the imager 9, the output of which is for prison to the second input of generator 12, the output of line blanking pulse sensor 1 is connected to respective inputs of the counters and the control unit 14. The output of the counter 13 is connected to the information inputs of the control unit 14, the block 7, the block 10 and the buffer memory 15 and the address inputs of the block 7 and the block 10. The output of the control block 14 is connected to the setup input of the counter 13, and the other two outputs Yu

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memory, and two

common inputs of block 7

other outputs - to the control inputs of the memory block 10; The output of the clock pulses of the sensor 1 is connected to the clock inputs of the element 9, the counter 13

and the control unit 14, the output of the counter 1 1 is connected to the second information input of the buffer memory 15, the third information input of which is connected to the output of the counter 16, the setup input combined with the installation input of the counter 16, to the output of the raiser 9, fifth, sixth, the seventh inputs are to the outputs of the imaging unit 9, a separate output of which is connected to the counting input of the counter 16, the control output of which is connected to the corresponding input of the imaging unit 9. The output of the buffer memory 15 is the information output of the device.

Shaper 9 control signals contains channel receivers (not

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shown) that receive from the computer channel 12 address bits and signals: WU - computer access signal to an external device; SIA - active device synchronization signal} OUTPUT - data transmission signal to an external device; ENTER - a signal to transfer data from an external device.

The device works as follows.

When according to the user program it is necessary to enter the image of the working area, the computer proceeds to the execution of the external device service subprogram. The command codes received from the computer are decoded by the shaper 9 control signals and provide the following sequence of operations: resetting the counter 16; erasing the contents of the buffer memory 15; reset counter 16; storing 15 numbers of lines and columns of the image contour; reset counter 16; selection of information from memory 15 in a computer.

In the reset mode, the counter 16 is reset, and thus the buffer memory 15 is always accessed from the first cell.

In the mode of erasing the contents of the buffer memory 15, the imaging unit 9 controls the operation of the memory 15 so that a constant is recorded at all addresses specified by the counter 16. Before the recording mode, it is necessary to reset the counter 16 so that the recording takes place from the first memory cell 15. In this mode, the shaper 9 produces Erase pulses that cover the information inputs of the memory 15. The Erasure cycle duration is determined by the memory size 15, and as a result , by the counter 16, and upon completion of the Erase from the last counter of the counter 16, the driver 9 receives a level, which resets it to its original state.

At the end of the cycle, the same information is recorded in all cells of the buffer memory 15.

In recording mode, the device operates synchronously with the image sensor 1. During operation, the device selects the contours of the image of objects, writes them into memory 15. The image sensor 1 senses an optical image of a portion of the working area. it

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the image is converted by sensor 1 into a sequence of electrical signals.

The video signal arrives at the threshold element 2, the horizontal damping pulse arrives at the counter 11 and the control unit 14, the frame damping pulse (IHI) is fed to the counter 11 and the frame resolution enable generator 12, and the clock sync pulse (TI) is fed to the counter 13 and Shaper 9.

After the threshold element 2, a binary signal in the form of bursts of pulses is generated, which is fed to the one-oscillators 3 and 4, which ensure that each pulse is expanded from the pack so that adjacent pulses that are not longer than one sensor pulse 1 are stitched ( the back and front edges of adjacent pulses are connected, respectively), and those that are longer than one pulse are not stitched. Moreover, the one-shot 3 is triggered by the leading edge of each pulse of the stack, the one-shot 4 by the falling edge of each pulse of the stack.

Thus, the implementations of the signals at the outputs of one-shot 3, 4-are shifted to the duration of one pulse in the packet. From the outputs of one-shot 3, 4 signals are sent to separate inputs of the EXCLUSIVE OR 5 element, at the output of which pulses are formed, corresponding to the vertical limits of the video signal realization. At the output of element 5, a signal is formed that characterizes the vertical borders of the image of objects. The signal generated by the one-shot 3 is also fed to the information input of the buffer memory 7, the information from the output of which is fed through the information input to the memory block 10. The control unit 14 organizes the operation mode of the blocks 7, 10 in such a way that the recording of the signals in the block 7 at the address formed by the counter 13 and the reading of the signals from the block 10 at the address formed by the counter 13 are performed synchronously with the information part of the line, and The reading of information from block 7 and the recording of information in block 10 are carried out in the period of the absence of information on the line. Thus, in pe0

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its output is delayed for the duration of one line. The delayed information arrives at the first input of the EXCLUSIVE OR 6 element, the second input of which receives a signal from the one-vibrator 3. As a result, the output of element 6 selects the mismatched parts of the signal realizations on two adjacent lines, and as a result, the horizontal parts of the contours are formed objects. The signals from the outputs of elements 5, 6 are fed to the inputs of the element OR 8, at the output of which the outlines of the image of objects are formed. From the output of the OR 8 element, the signals corresponding to the contour elements enter the imaging unit 9 and allow the TI to pass from sensor 1 to memory 15 and counter 16 during the action of the sampling resolution pulse from the imaging unit 12. Pulses with a duration equal to the reading time of one frame of the image are generated in synchronization with the operation of sensor 1. The control pulses enable writing to the memory 15 by the addresses formed by the counter 16, information from counters 11, 13, which is the row and column number of the contour element. about the image of the object. . In the sampling mode, the device operates as follows.

Note that before the sampling mode, the counter 16 is reset in a manner similar to that described. The sample operation code received from the computer channel is decrypted and a short pulse is generated, which is fed into memory 15 and counter 16. Control signals allow reading from memory 15 at the address generated by counter 16 (in this case equal to one).

The read row and column numbers are fed into the computer channel and already in the computer are compared to a constant in software. If the read content of the cell is not equal to the constant (which corresponds to the occupied cell), then the control command transfers the Sampling operations. And so on until all the numbers of the columns and rows of the contour are selected. As soon as the cell content is equal to a constant (which corresponds to an empty cell), the sampling mode is terminated. Computer goes from under

press read from block 10 information on the service program of the external device to the main user program.

Compared with the known, the proposed device has a higher speed.

F, o rm a lu inventions 1. Device for reading cone

images of objects, containing an image sensor, a control unit, the first and second memory blocks, the first counter and a computer interface unit, the output of which is an information output of the device, characterized in that, in order to improve speed, it contains threshold element, element OR, first and second one-shot, second counter first and second elements EXCLUSIVE OR, the first output of the image sensor is connected to the first input of the threshold element, the second input of which is the control input of the device, and the output is connected to the trigger inputs of the first and second single vibrators, the second output of the image sensor is connected to the counting input of the first counter and the control input of the control unit, the third output of the image sensor is connected to the clock input of the second computer counter, the counting input of the second counter and the clock input control unit, the fourth output of the image sensor is connected to the installation input of the first counter and the first control input of the computer interface unit, the first information input of which is connected to the computer The control input of the control unit and the address inputs of the first and second memory blocks are connected to the output of the second counter, the first output of the control unit is connected to the installation input of the second counter, the second and third outputs of the control unit are connected respectively to the first and second control inputs of the first memory block the output of which is connected to the information input of the second memory block, the first and second control inputs of which are connected respectively to the fourth and fifth outputs of the block

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control, the output of the first counter is connected to the second information input of the interface to the computer, the third information input of which is the information input of the device, the output of the second one-oscillator is connected to the first input of the first element EXCLUSIVE OR, the second input of which is connected to the first input of the second element EXCLUSIVE OR and the third control input of the first memory block is connected to the output of the first one-shot, the output of the second memory block is connected to the second input of the second element EXCLUSIVE OR, the output to torogo connected to the first input of the OR gate, a second input coupled to an output of the first exclusive-OR gate and an output of OR connected to the second control input interface unit with a computer.

2. Pop-up device 1, characterized in that the computer interface unit contains a control signal generator, a counter, a resolution signal conditioner and a buffer memory, the output of which is the information output of the block, and the first and second information inputs of which are the first and the second information inputs of the block, the third information input of which is the information input of the control signal generator, the clock input of which is the clock input of the block, the first and second control inputs of which are The first control input of the enable signal generator and the first control input of the control signal generator, respectively, the second control input of which is connected to the output of the resolution signal generator, the second control input of which is connected to one of the outputs of the control signaling generator, the other outputs of which are connected respectively to the counting and installation inputs of the meter and to the control inputs of the memory, the address input of which is connected to one of the outputs of the meter, the other output of which is connected Connected to the third control input of the control driver.

Claims (2)

Claim 1. A device for reading the contours of images of objects, containing an image sensor, a control unit, a first and second memory blocks, a first counter and a computer interface unit, the output of which is an information output of the device, characterized in that, in order to improve performance, it contains threshold element, III element, first and second one-shots, second counter first and second elements EXCLUSIVE OR, the first output of the image sensor is connected to the first input of the threshold element, the second input of which is a control -governing input device and an output coupled to the triggering inputs of the first and second monostable multivibrators, the second image sensor output is connected to the counting input of the first counter and councils. to the input of the control unit, the third output of the image sensor is connected to the clock input of the computer interface unit, the counting input of the second counter and the clock input of the control unit, the fourth output of the image sensor is connected to the installation input of the first counter and the first control input of the computer interface unit, the first information input which, connected to the information input of the control unit and address inputs of the first and second memory blocks, is connected to the output of the second counter, the first output of the control unit is connected is connected with the installation input of the second counter, the second and third outputs of the control unit are connected respectively to the first and second control inputs of the first memory block, the output of which is connected to the information input of the second memory block, the first and second control inputs of which are connected respectively to the fourth and fifth outputs of the block control, the output of the first counter is connected to the second information input of the computer interface unit, the third information input of which is the information input of the device, the output of the second a single vibrator is connected to the first input of the first EXCLUSIVE OR element, the second input of which is connected to the first input of the second EXCLUSIVE OR element and the third control input of the first memory block, is connected to the output of the first single vibrator, the output of the second memory block is connected to the second input of the second EXCLUSIVE OR, output which is connected to the first input of the OR element, the second input of which is connected to the output of the first element EXCLUSIVE OR, and the output of the OR element is connected to the second control input of the unit Iya with a computer. 2. The device pop.1, characterized in that the unit for interfacing with a computer contains a driver of control signals, a counter, a driver of a permission signal and buffer memory, the output of which is the information output of the block, and the first and second information inputs of which are the first and second information inputs of the block , the third information input of which is the information input of the driver of control signals, the clock input of which is the clock input of the unit, the first and second control inputs of which are I, respectively, the first control input of the driver of the enable signal and the first control input of the driver of the control signals, the second control input of which is connected to the output of the driver of the signal of permission, the second control input of which is connected to one of the outputs of the driver of the control signals, the other outputs of which are connected respectively to the counting and installation inputs counter and control inputs of the memory, the address input of which is connected to one of the outputs of the counter, the other output of which is connected to the third control input of the driver of control signals.