SU1362924A1 - Device for measuring geometrical parameters of image - Google Patents

Abstract

This invention relates to a control measurement technique. The aim of the invention is to improve the accuracy of measuring objects of irregular shape and simplify the design by analyzing objects in a limited area of the image. In the device, at the output of the imaging unit and the delay elements, gating pulses are formed, giving three marker lines. The objects are analyzed between the extreme marker lines, but only the area of those ones whose impulse coincides with the impulse from the middle marker line is considered. 1 il. F CO to

Description

The invention relates to instrumentation technology and can be used in automatic systems for analyzing images of micro-objects using a television camera.

The purpose of the invention is to improve the accuracy of measuring objects of irregular shape and simplify the design by analyzing objects in a limited area of the image.

The drawing shows a block diagram of a device for measuring geometric parameters of images.

The device contains a video signal sensor 1, a discriminator 2, AND 3-8 circuits, a gating unit 9, a pulse counter 10, an interface unit 11, a recording unit 12, triggers 13-17, a variable-voltage generator 18, a comparison circuit 19, shaper 20 pulse-. owls, delay elements 21–23, the OR circuit 24, and the counter of 25 objects.

A television sensor 1 is connected in series with a step-varying voltage generator 18, a comparison circuit 19, a pulse shaper 20, a first delay element 21, and a second delay element 22. The second output of the television sensor 1 is connected to the second input of the comparison circuit 19. The third output of the television sensor 1 is connected in series with the discriminator 2, the first OF circuit, gating unit 9, pulse counter 10, interface unit 11 and the recording unit 12. The output of the first circuit AND 3 is also connected in series with the first trigger 14, second circuit AND 4 , the third circuit And 5 and with the counter 25 the number of objects. The output of the driver 20 is connected in parallel with the second input of the trigger 14, with the fifth trigger 15 and the fourth circuit AND 6. The output of the first delay element 21 is connected to the first input of the fifth circuit 7. 7. To the output of the second element 22, delays are connected in parallel to the pole AND circuit 8, the second input of the fifth trigger 15 and the second input of the second circuit AND 4. The output of the discriminator 2 is connected in parallel to the second inputs of the fourth, fifth and sixth circuits AND 6, 7 and 8. The output of the fifth trigger 15 is connected to the second input of the first circuit AND 3. The output of the fourth circuit And 6 pos

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Consequently, it is connected with the OR circuit 24, with the third trigger 16 and with the second input of the third circuit AND 5. The output of the circuit And 7 is connected to the fourth trigger 17 and the third input of the third circuit 5. It is connected to the output of the sixth And 8 OR 24. The left trigger is connected to the input of the third circuit AND 5, we AND 4 are connected to the input of the third delay element 23, the output of which is connected to the second inputs of the second, third and fourth triggers 13, 16 and 17 and the second input of the counter 10 pulses. The output of the third circuit And 5 is also connected to the second input of the interface block.

The device works as follows.

The frame sync pulses from the television sensor 1 are fed to a variable-voltage generator 18, where a sawtooth step voltage is formed with a unit increment after each frame. This voltage and the sawtooth voltage of the lines from the television sensor 1 are fed to a comparison circuit 19. When the voltages are equal, the comparison circuit 19 generates a command for the driver 20. At the output of the driver 20 and the delay elements 21 and 22, the first, second and third gates appear, which form three marker lines. Moreover, the distance between the extreme lines determines the maximum linear size of the image of the object along the lines to be analyzed, and the distance between the middle (second) line and the third marker line equals the unit increment along the lines. With the arrival of the next frame sync pulse, the lines are displaced along the rows by a single increment value.

The video signals from the television sensor 1, passed through the discriminator 2, are fed to the AND 3 circuit. To the other input of this circuit, voltage is supplied from the trigger 15, which is controlled by the first and third gating AND pulses. Those. at the output of the circuit 3 in video hardware, video pulses from images of objects that are located between these pulses. Next, the video signals arrive at gating station 9, at the output

which appears a burst of pulses, proportional to the duration of the video signal from the object. These pulses are accumulated in counter 10. On trigger 14 and circuit 4, the first and third gating pulses are applied, respectively. At the output of the circuit 4, a signal No object is generated. This signal, through the delay element 23, zeroes the contents of the pulse counter 10, cocks the trigger 16 and zeroes the triggers 13 and 17.

From the output of discriminator 2, video pulses are applied to circuits AND 6, 7, and 8, to the other inputs of which, respectively, the first, second, and third gating pulses arrive. If at the moment of the accumulation of the counter 10 pulses there was at least one coincidence of the video signal with the first and third strobe pulses, then the signal from the AND 6 or 8 scheme through the OR 24 circuit whipped the trigger 16, and if it coincided with the second gating pulse, then the signal from the AND 7 circuit will trigger the trigger 17. The first video impulse from the object will trigger the trigger 13.

Thus, the pulse counter 10 is always zeroed out when the No object command is generated at the output of the AND 4 circuit. Only in the case when there were no signals from AND 6 and 8 circuits, but a signal from AND 7 circuit before zeroing the counter 10 pulses at the output of the AND 5 circuit, the signal ends the object that enters the particle number counter 25 and gives the transmission resolution the contents of counter 10 through interface 11 to registering unit 12. After that, a signal appears on delay element 23 and the circuit will return to its initial state before meeting with the next object.

Within one frame, all those objects that do not intersect at the extreme marker lines, but intersect the average, are calculated.

Claims (1)

Invention Formula A device for measuring geometric pairs of image frames, comprising a television video signal sensor connected in series by a step voltage generator and a comparison circuit, the second input of which is connected to the second you: 15 20 Iq . 25 sensor, the first output of which is connected to a step voltage generator, is connected in series with an AND circuit, a gating unit and a pulse counter, so that, in order to improve the measurement accuracy of irregularly shaped objects and simplify the design, it is equipped with a pulse shaper, five triggers, second, third, fourth, fifth, and sixth circuits AND, an OR circuit, an interface block, a recording unit, a counter of the number of objects, and three delay elements, two of which are connected in series The first of them is connected to the output of the pulse former, whose input is connected to the output of the comparison circuit, the discriminator whose input is connected to the third output of the television sensor, and the output to the first input of the first And circuit, the output of which is also connected to the first inputs of the first and second flip-flops, the pulse counter is connected to the registering unit through the interface block, the first trigger through the second and third circuits I are connected in series with the counter of the number of objects, the output of the second trigger is connected to the second the input of the third circuit And, the output of the pulse driver is connected to the second inputs of the first and fifth triggers, as well as to the second input of the fourth circuit AND, i the output of the first delay element is connected to the second input of the fifth circuit And, the pole AND circuit, OR circuit and the third trigger connected in series, the output of the second delay element is connected to the second input of the AND circuit, the first input of the fifth trigger and the first input of the sixth And circuit, the output of the second AND circuit is also connected to the third delay element, the output of which is connected to the second inputs of the second, t Third and fourth triggers and a pulse counter, the output of the discriminator is also connected to the second inputs of the fourth, fifth and sixth circuits AND, the output of the fourth circuit AND is connected to the second input of the OR circuit, the output of the first delay element is also connected to the first input of the fifth circuit And, the fifth circuit And the fourth trigger are connected in series, the output of the fourth trigger is connected to the third input of the third circuit And, to the fourth input thirty 35 0 0 five which is connected to the third output Hera connected to the second input trigger, the output of the driver of the connection of the first AND scheme, and the output of the third - yen also with the first input of the fourth AND scheme And the second circuits of the first and fifth triggers, the output of the fifth trigger the second entrance either. block sopr same