SU1277154A1 - Device for classifying and counting number of objects - Google Patents

Abstract

The invention relates to automation and computing, in particular to devices for dividing objects into classes and counting their number in each class. The purpose of the invention is to improve the accuracy of the device due to the possibility of classification and separate registration of objects that have a common border, but differ in brightness. The luminance signal of an object, quantized by level, is fed to amplitude selectors. The signal passes through the appropriate amplitude selector to the summing input of the corresponding reversible counter and to the corresponding amplitude comparator, where it is compared with the delayed signal. The output of the comparator is connected to the subtracting input of the reversible counter. If the amplitudes of the signals are equal at both inputs of the comparator, a subtraction occurs in the said counter. At the output of the counter, information about the number is collected. (The number of objects having luminance ate is different by no more than one step in the level in the quantizing unit. 1 Il.

Description

. eleven

The invention relates to automation and computing, in particular to devices for dividing objects into classes and counting kx. quantities in each class, and can be used in the decoding of aerial photographs and other static visual information.

The aim of the invention is to improve the accuracy of the device when classifying objects with a common border.

The drawing shows a block diagram of the proposed device.

The device contains a television sensor 1, a quantization unit 2, a delay element 3, amplitude comparators 4, - 4.J, amplitude selectors 5 - memory, and reversible counters 6, - 6 ,.

The device works as follows.

The video signal from the output of the television sensor 1 is fed to the input of the quantization unit 2, in which it is converted into a multi-level signal containing pulses with a normalized amplitude corresponding to the brightness of the object being scanned, the duration of each of which corresponds to the scan time of the images of the objects. The number of signal levels at the output of the quantization unit 2 determines the number of objects to be divided. From the output of the quantization unit 2, the intersection pulses are fed to the input of delay element 3 and the amplitude selector inputs 5 (–5, which make a signal of one specific amplitude corresponding to one of the quantization levels of the signal at the output of the quantization unit 2. Delayed equal to the scanning period of a single line, the intersection pulses from the output of the delay element 3 are fed to the inputs of amplitude comparators 4-4f, to the other inputs of which the signal is fed from the outputs of the corresponding selectors 5 5. At the output of the amplitude comparator a pulse is formed only if the amplitudes of the signals at the inputs of the amplitude comparator are different 54 S

are zero and equal. The coincidence pulses formed at the output of each amplitude comparator 4-4 are fed to the subtractive inputs of the corresponding reversible counters 6-6. The sliding inputs of the reversible counters 6 ;, 6 receive pulses from the respective amplitude selectors 5, -5 ,. The difference between the number of pulses arriving at the corresponding inputs of the reversing counters 6-6 in one scan cycle of the analyzed field is equal to the number of objects of each class located in this field for single-connected objects of any shape, of constant strength, arbitrarily located on the plane.

Thus, due to the introduction of amplitude selectors and amplitude comparators, coincidence pulses are supplied to one of the inputs of the reversible counter, which can only be generated by scanning a single object. Therefore, it becomes possible to separately register several objects belonging to different classes, i.e. varying in brightness, even if they have a common border.

Claims (2)

. 11 The invention relates to automation and computing, in particular to devices for dividing objects into classes and counting kx. quantities in each class, and can be used in the decoding of aerial photographs and other static visual information. The aim of the invention is to improve the accuracy of the device when classifying objects with a common border. The drawing shows a block diagram of the proposed device. The device contains a television sensor 1, a quantization unit 2, a delay element 3, amplitude comparators 4, - 4.J, amplitude selectors 5 - memory, and reversible counters 6, - 6 ,. The device works as follows. The video signal from the output of the television sensor 1 is fed to the input of the quantization unit 2, in which it is converted into a multi-level signal containing pulses with a normalized amplitude corresponding to the brightness of the scanned object, the duration of each of which corresponds to the scan time of the images of the objects. The number of signal levels at the output of the quantization unit 2 determines the number of objects to be divided. From the output of the quantization unit 2, the intersection pulses are fed to the input of the delay element 3 and the inputs of the amplitude selectors 5 (- 5) which produce a signal of one definite amplitude corresponding to one of the quantization levels of the signal at the output of the quantization unit 2. Delayed for a time equal to the scanning period of a single line, the intersection pulses from the output of the delay element 3 are fed to the inputs of amplitude comparators 4-4f, to the other inputs of which a signal is supplied from the outputs of the respective selectors 5 5. At the output of the amplitude comparator a pulse is generated if the amplitudes of the signals at the inputs of the amplitude comparator are different from zero and are equal. The pulses of coincidence formed at the output of each amplitude comparator 4-4 are fed to the subtractive inputs of the corresponding reversible counters 6 6, At the sliding inputs of the reversible counters 6 ;, 6 the pulses are received selected by the appropriate amplitude selectors 5, -5 ,. The difference between the number of pulses arriving at the corresponding inputs of the reversing counters 6-6 in one scan cycle of the analyzed field is equal to the number of objects of each class located in this field for single-connected objects of any shape, of constant strength, arbitrarily located on the plane. Thus, by introducing amplitude selectors and amplitude comparators, coincidence pulses are applied to one of the inputs of the reversible counter, which can only be generated by scanning a single object. Therefore, it becomes possible to separately register several objects belonging to different classes, i.e. varying in brightness, even if they have a common border. An apparatus for classifying and counting a number of objects, comprising reversible counters and a serially connected television sensor, a quantization unit and a delay element, characterized in that, in order to improve the accuracy of the device, amplitude selectors are introduced to it, the inputs of which are connected to the output of the quantizing unit and amplitude comparators, the first inputs of which are connected to the output of the delay element, the second inputs are connected to the output of the amplitude selectors, and the outputs are connected to one of the inputs Ods of reversible meters, the other inputs of which are connected to the outputs of the amplitude selectors.