SU1133694A1 - Device for measuring area of object - Google Patents

Abstract

A DEVICE FOR MEASURING OBJECT AREAS, containing a television signal sensor, the output of which is connected to an amplitude discriminator input, serially connected Clock generator, key, pulse counter, digital display unit, signal mixer and video control unit, as well as a marker generation unit, and and the horizontal sync outputs of the television sensor are connected to co. the corresponding inputs of the video monitor unit, the digital display unit and the marker generation unit, the first inputs of the first and second triggers are connected to the line synchronous output of the television signal sensor, the output of the marker generation unit is connected to the second inputs of the first trigger and the signal mixer, the third input of which is connected to the output of the television signal sensor , that is, in order to improve the accuracy of measuring areas of complex shape, a row counter, a parallel register, a block of comparisons are introduced codes and the EXCLUSIVE OR element, connected in series between the horizontal sync code of the television signal sensor and the control input of the pulse counter, made reversible, as well as the memory unit connected by the outputs to the second inputs of the code comparison unit, the delay unit connected by the output to the second input of the second trigger, and And element connected by the output to the control input of the key, the output of the block of formation of the marker is connected to the installation input of the row counter, the clock input of the parallel regis tra and the input of the delay unit, the first, second and third inputs of the ele & element And connected respectively-Aenno. From the second to the second output of the code comparison unit, the output of the first trigger and the output of the amplitude discriminator connected to the fourth input of the signal mixer, and the output of the second trigger is connected to the second input of the EXCLUSIVE OR element.

Description

The invention relates to applied television, in particular, devices for erasing the areas of objects, which allow measuring the areas of arbitrarily selected objects of any shape and connectivity, and can be used in medicine, biology, flaw detection, metallurgy, geology and cartography,

A device for measuring the area of objects is known, comprising a television sensor, an amplitude discriminator, an element I, a clock generator, a counter, a signal mixer and a video monitoring unit lj

The device, using an amplitude discriminator, selects the object to be measured, fills it with clock pulses, and counts the number of pulses, which is proportional to the measured area.

The drawback of the device is the low accuracy of the area measurement, due to the impossibility of separating the measured object from other objects with the same amplitude of the video signal.

The closest in technical essence to the proposed is

„.„

a device for measuring areas of objects containing a television signal sensor, the output of which is connected to the input of the amplitude discriminator, a series of connected clock generator, a key, a pulse counter, a digital display unit, a signal mixer and a video monitoring unit, as well as a marker generation unit, and frames and the horizontal sync outputs of the television sensor are connected to the corresponding inputs of the video monitoring unit, the digital display unit and the marker generation unit; the first inputs are st and second flip-flops are connected to the line sensor sinhrovyhodu television signals, a marker generating unit output is connected to second inputs of the first flip-flop and the mixer, the third input of which is connected to the output of the sensor 2 of television signals.

The known device allows to select an object to be measured by an amplitude discriminator and a marker that is to the left of the object, with the upper line itself crossing the object,

must cross and marker. In this line, among the plots allocated by the amplitude discriminator, it is considered to belong to the measured object, which is located between the first positive and the first negative differences of the two-gradient image to the right. In the next line, the line segment between adjacent positive and negative differences, which lies at least partially under the already selected segment in the previous line, is considered to belong to this object. The inserted chords are filled with counting pulses, the number of which is counted by a pulse counter and displayed on a video monitoring unit.

The drawbacks of the device are low accuracy of area measurement in the analysis of complex images containing voids and having a rugged contour, as well as the impossibility of measuring a part of an object or the total area of several objects.

The purpose of the invention is to improve the accuracy of measuring the area of complex shape.

The goal is achieved by inserting a row counter, a parallel register, a code comparison unit and an EXCLUSIVE OR element, connected in series between the horizontal sync output of a television signal sensor and, controlling the input of a pulse counter, which is reversible, and also remember. The block connected by the outputs to the second inputs of the code comparison block, the delay block connected by the output to the second input of the second trigger, and the AND element connected by the output to the control The key input, the output of the marker generation unit is connected to the installation input of the row counter, the clock input of the parallel register and the input of the delay unit, the first, second and third inputs of the K element are connected respectively to the second output of the code comparison unit, the output of the first trigger and the amplitude discriminator output, connected to the fourth input of the signal mixer, and the output of the second trigger is connected to the second input of the element COMPLETE OR. Figure 1 shows the structural electrical circuit of the proposed

devices; Fig. 2 illustrates an exemplary process for measuring the area of an object.

The device contains a sensor 1 television signals, amplitude discriminator 2, element 3, key 4, reversible counter 5 pulses, block 6 digital display, mixer

7 signals, video control unit 8, block 9 of the formation of the marker, the first trigger 10, block 11 delay, the second trigger 12, the element EXCLUSIVE OR

13, a clock pulse generator 14, a row counter 15, a parallel register 16, a code comparison block 17, a memory block 18.

The device works as follows.

At the output of the sensor 1 of the television signals, a video signal is formed, which through the signal mixer 7 goes to the video monitoring unit

8 (figure 1). The operator, having detected the area of interest in the image, selects it with the help of amplitude discriminator 2. Block 9 is used to completely separate the information section from other sites of the same brightness, forming a luminous marker on the screen of the video control unit 8. encircles the area in which there is only the object of interest to it and the group of objects.

The measurement is made directly during the bypass process. The formation of the measuring line is carried out by the first trigger 10, which inserts the line following the marker, and to recognize the vertical movement of the marker from line to line during one frame, use the counter of 15 lines, parallel register 16, block 17 and memorizing block 18. If the marker is stationary on any line, then in the interval between two adjacent marker pulses, which occur once in a television frame, the counter of 15 lines will have time to count the number n equal to the number of lines N in the frame. At the time of the arrival of the next marker, this number P is rewritten into parallel register 16, and the counter of 15 lines is reset.

In the case of moving the marker up the line, the number of lines. When the marker is moved one line down and Ы + 1. Block 17 compares the number П coming from the parapel

register 16 with the number fJ recorded in the storage unit 18. The potential of logical 1 appears at the first output of block 17 at ll N, which corresponds to the movement of the marker downwards, and at the second output - during any movement of the marker along the lines, i.e. at gz j N. As a result, a pulse with a duration of one line from the output of the first trigger 10 and a pulse with a duration of one frame from the second output of block 17 are combined with an AND 3 element when the amplitude detector 2 is selected by the corresponding object. As a result, a measuring line is formed, lying under the line allocated by block 9 on the screen of video control unit 8. HSpuch 4 passes impulses from the heater 14 to the countable input of the reversible counter 5 only at the moment of arrival of the positive potential to all three inputs of the IZ element.

To control the operation mode of the reversible counter 5, use the delay block 11, the second trigger 12, and the EXCLUSIVE OR element 13. I

Second trigger 12 on admission

delayed for the duration of the line by the block 11 of the delay signal from the output block 9 divides the measuring line lying below the line marked by a marker into two parts - before the marker and after the marker. The EXCLUSIVE IL 13 element, on the basis of information about the direction of movement of the marker received from the first output of block 17 and the signal from the second output of the second trigger 12, switches the operation mode of the reversing counter 5. When the marker is crossed up (FIG. 2), all chords selected with amplitude discriminator 2 from the beginning of the CTpoKiC to the marker, is summed with the CO sign -, and after the marker - with the sign -f. When you move the marker down, on the contrary, everything. chord lengths up to the marker are added with the + sign, and after the marker - with the - sign. After closing the contour, the chord lengths of all objects outside of it are summed twice with different signs and give a result equal to O. The lengths of the chords of the measured object are summed twice with one sign, with the result that the number recorded in the reversible counter 5 is proportional to the area required. . Thus, the proposed device allows to increase the accuracy of measuring areas of complex shape containing voids and having a dissected contour, and also provides 1 133694b measurement of the total area of several objects due to the complete determination of objects of any connectivity when tracing the marker of objects amplified by the discriminator.

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fig 1

Fig2

Claims (1)

DEVICE FOR MEASURING AREAS OF OBJECTS, comprising a television signal sensor, the output of which is connected to an amplitude discriminator input, a clock pulse generator, a key, a pulse counter, a digital display unit, a signal mixer and a video control unit, as well as a marker forming unit, both frame and line the clock outputs of the television sensor are connected to co. the corresponding inputs of the video control unit, digital indication unit and marker forming unit, the first inputs of the first and second triggers are connected to the horizontal sync output of the television signal sensor, the output of the marker forming unit is connected to the second inputs of the first trigger and signal mixer, the third input of which is connected to the output of the television signal sensor , characterized in that, in order to improve the accuracy of measuring areas of complex shape, a line counter, a parallel register, a block of code and electronic comparisons have been introduced an EXCLUSIVE OR element connected in series between the horizontal sync output of the television signal sensor and the control input of a pulse counter made reversible, as well as a memory block connected by outputs to the second inputs of the code comparison unit, § a delay unit connected by the output to the second input of the second trigger, and an element And, connected by the output to the control input of the key, and the output of the block for forming the marker of sub-g keys to the installation input of the counter — t k lines, the clock input of the parallel register and input a delay unit, first, second and third inputs of AND gates respectively connected. to the second output of the code comparison unit, the output of the first trigger and the output of the amplitude discriminator connected to the fourth input of the signal mixer, and the output of the second trigger is connected to the second input of the EXCLUSIVE OR element.