RU2209466C2 - Device for separating flags in object identification - Google Patents

Abstract

FIELD: computer engineering. SUBSTANCE: device that can be used for automatic analyses of images has photoelectric converter, position signals generators, switches, video signal digitizing circuit, time unit, memory, AND gate, and counter. EFFECT: enlarged functional capabilities. 1 cl, 1 dwg

Description

 The invention relates to metrology, automation and technical cybernetics and can be used in the development of systems for automatic analysis and classification of images.

 A device is known for preliminary processing of an image to be recognized, comprising a photoelectric converter for scanning the initial image, generating signals at the second output and time-sequential electrical video signals at the first output, to which are connected a series-connected circuit for sampling video signals, a logic circuit for the first input and a set of counters ; a circuit input for generating positional signals determining the position of each binary video signal on the image plane and a memory input using positional signals as addressable, the output of which is connected to the second input of the logic circuit and the circuit output for generating positional signals is connected to the second output of the photoelectric converter with one of the inputs of the set of counters [1].

 The disadvantage of this device is the limited number of operations and insufficient accuracy when processing images.

 Closest to the technical nature of the proposed device is a device for highlighting features in recognition of objects, containing a photoelectric converter, first and second positioner of the signal signals, the first, second and third switches, a sampling circuit for video signals, a temporary device, memory, logical circuit I, and a counter, the output of the second positioner driver is connected to the second input of the second switch, the first input of which is connected to the output of the first positioner Ignalov, the third input is with the first output of the temporary devices and the input of the first switch, and the output is connected to the second input of the third switch, the first input of which is connected to the output of the matrix photoelectric converter, the output of the third switch is connected to the input of the video sampling circuit, the first memory input is connected to the output of the first switch, the second input with the output of the video sampling circuit, the third input with the second output of the temporary device, the fourth input with the third output of the temporary apparatus and the first input of the counter, and an output memory connected to the first input of the AND gate, whose output is connected to the second input of the counter, the fourth output timing device coupled to the second input of the AND circuit, the counter output is the output device [2].

 The disadvantage of this device is the low likelihood of image recognition due to the small number of signs that allow you to select this device.

 The objective of the invention is to expand the capabilities of image recognition, increase the likelihood of recognition by determining an additional feature of the image - the degree of heterogeneity of the brightness of the surface of the object with local contrast.

 This object is achieved by the fact that in the device for distinguishing features in recognition of objects containing a photoelectric converter, the first and second drivers of positional signals, the first, second and third switches, a sampling circuit for video signals, a temporary device, memory, logic circuit And, a counter, and the output the second positioner driver is connected to the second input of the second switch, the first input of which is connected to the output of the first positioner, the third input - the first output of the temporary device and the input of the first switch, and the output is connected to the second input of the third switch, the first input of which is connected to the output of the matrix photoelectric converter, the output of the third switch is connected to the input of the video sampling circuit, the first memory input is connected to the output of the first switch, the third input - with the second output of the temporary device, the fourth input - with the third output of the temporary device and the first input of the counter, and the memory output is connected to the first input of the logic a circuit And, the output of which is connected to the second input of the counter, the fourth output of the temporary device is connected to the second input of the logic circuit And, a third positioner and a fourth switch are additionally introduced, the output of the third positioner being connected to the second input of the fourth switch, the first input of which connected to the output of the video sampling circuit, the third input to the fourth output of the temporary device and the second input of the AND logic circuit, and the output to the second memory input tee.

 The positive effect is ensured by counting the number of N signals with different amplitudes from discrete image elements of the surface of the selected object. The value of N corresponds to the number of gradations of the level of brightness (colors in a multicolor image) on the surface of the selected object, which are absent against the surrounding background, and characterizes the degree of heterogeneity of the brightness of the surface of the object with local contrast.

 This technical solution is illustrated by the drawing, which shows a block diagram of the proposed device.

 The proposed device operates as follows.

 The matrix-type photoelectric converter (6) receives optical signals from the field of view containing the desired object, converts optical signals into electrical video signals and splits the plot image into discrete elements. The signals from the elements of the matrix of the photoelectric converter are sequentially viewed by an electronic window in the form of a background frame, inside of which in the center there is an electronic image window of an object (OIO), and the dimensions of the image window of the object are comparable with the size of the image of the object.

 To do this, when power is applied, the signal from the first output of the temporary device 10 enters the input 3 of the switch 2 (4) and sets it to the position when the OIO addresses defined in the second arrive at the second input of the switch 3 (7) through the second input and output of the switch 2 shaper positional signals OIO 2 in accordance with the law of scanning, and the switch 1 (3) is set to state "1", in which from its output to the first input of memory 11 receives the signal "1".

 At the second output of the temporary device, a memory recording signal is generated, which is fed to the 3rd memory input, which allows recording information. A pulse arises at the third output of the temporary device, setting the device to its initial state: reset (writing "0" to all elements) via the 4th memory input and the first input of counter 13. The signal "0" from the fourth output of the temporary device is fed to the second logical input circuit (12), which is AND circuitry, and blocks the operation of the counter, as well as to the third input of the switch 4 (9), while setting it to a state in which signals from the output of the video sampling circuit 8 arrive at the second input of the memory block.

 The analyzed image is projected onto the matrix of the photoelectric converter. At the addresses coming from the second positioner of the signal through the switch 2 to the second input of the switch 3, the switch 3 connects the matrix elements of the photoelectric converter belonging to the OIO to the sampling circuit of the video signals 8, in which the analog signal is converted from the photoelectric converter to a digital code. A level “1” is recorded in memory, acting at its first input from the output of switch 1, at the addresses received at the second input of the memory from the output of the video sampling circuit through switch 4. As a result of interrogation of the elements of OIO in the memory at addresses equal to the amplitudes of the signals from the photoelectric converter matrix elements corresponding to the OIO are recorded as "1", i.e. through the values of the memory addresses, the amplitudes of the OIO signals are determined.

 At the end of the interrogation of the OIO elements, a pulse of interrogation of the background frame elements appears at the first output of the temporary device, which goes to the third input of the switch 2 and switches its state to the mode of connecting the first positioner of the signal signals of the background frame (1) to the second input of the switch 3, and the switch 1 to state "0".

 From discrete elements of the image window of an object, elements with signal values that are present among signals from discrete elements of the background frame are excluded. This operation extracts signals from the image of an object having alternating contrast with respect to the surrounding background and sizes corresponding to the dimensions of the desired object.

 To do this, at the addresses coming to the second input of the switch 3 from the first positioner of the signal through the switch 2, the switch 3 connects to the video sampling circuit the photoelectric converter matrix elements belonging to the background frame. After the sampling scheme of the video signals, the values of the background frame addresses appear at the second memory input, at which the level "0" acting on the first input is written to the memory. In this case, the state of only those memory cells changes in which “1” was recorded in the previous step (polling of the OIO elements), i.e. information is erased from the memory at addresses expressed by signal amplitudes that are the same for the OIO and the background frame.

 At the end of the interrogation of the elements of the background frame in the memory, "1" is written only to those addresses whose values are equal to the amplitudes of the signals from the elements of the OIO and are not among the amplitudes from the elements of the background frame. To determine the desired value of the attribute — the degree of heterogeneity of the brightness of the surface of the object with local contrast — the number of units stored in the memory is calculated.

 Simultaneously with the completion of the interrogation of the background frame elements, a read signal from the second output of the temporary device appears on the 3rd input of the memory, "1" is formed at the 4th output of the temporary device, which goes to the second input of the AND logic circuit, and allows the counter to count single pulses coming at his second entrance. Logical signal “1” from the 4th output of the temporary device also goes to the third input of the switch 4, which connects the output of the third driver of positional signals 5 with the second memory input. Addresses corresponding to signal amplitudes in the bit range of the video sampling circuit are sequentially fed to its second input.

 If a pulse arises at the second memory input with an amplitude equal to the address of the memory cell in which "1" is stored, a positive pulse is output from the memory output to the first input of the AND logic circuit and from its output to the second counter input, where single pulses are counted.

 The counter can be performed, for example, on the K155IE2 chip, the logic circuit I is K155LA1, the switches are K176KT1, the memory is K155RU5, the sampling circuit is an analog-to-digital converter K1107 PV1, the photoelectric converter can be performed, for example, on a CCD matrix [3], the temporary device is like a timer 555 [4], and the positioners of positional signals are similar to the prototype [2].

 Thus, the use of the proposed device allows you to highlight an additional feature of the image of the object - the degree of heterogeneity of the rage of the surface of the object with its local contrast, which increases the likelihood of recognition of the object.

 The inventive device for highlighting signs in the recognition of images of objects tested with great efficiency in the complex "Hermes", "Peck-D".

Sources of information
1. A. z. Japan N 64-6508, cl. G 06 F 15/64, 15/66, G 06 K 9/20, 9/36 - analogue.

 2. Patent for the invention of the Russian Federation N 2173880 from 09/20/2001, cl. G 06 K 9/46 - prototype.

 3. L.I. Khromov, N.V. Lebedev, A.K. Tsytsulin, A.N. Kulikov. Solid state television. M .: Radio and communications, 1986.

 4. M. Tuli. Reference manual on digital electronics. M .: Energoizdat, 1990, p. 36-40.

Claims (1)

 A device for distinguishing features in recognition of objects, comprising a photoelectric converter, first and second positional signal conditioners, first, second and third switches, a video sampling circuit, a temporary device, memory, AND logic, a counter, the output of the second positioner being connected to the second the input of the second switch, the first input of which is connected to the output of the first driver of positional signals, the third input - with the first output of the temporary device and input ohm of the first switch, and the output is connected to the second input of the third switch, the first input of which is connected to the output of the matrix-type photoelectric converter, the output of the third switch is connected to the input of the video sampling circuit, the first memory input is connected to the output of the first switch, the third input is to the second output of the temporary devices, the fourth input is with the third output of the temporary device and the first input of the counter, and the memory output is connected to the first input of the AND logic circuit, the output of which is connected to the second m of the counter input, the fourth output of the temporary device is connected to the second input of the logic circuit And, characterized in that a third positioner and a fourth switch are inserted into it, the output of the third positioner being connected to the second input of the fourth switch, the first input of which is connected to the output video sampling schemes, the third input with the fourth output of the temporary device and the second input of the AND logic circuit, and the output with the second memory input.