SU1587553A1 - Device for displaying informative elements of image - Google Patents

Abstract

The invention relates to automation and computer technology, in particular to devices for selecting contour elements. The purpose of the invention is to improve the accuracy of the device. The device allows you to select corner and linear contour elements, as well as filter out interference in the form of three or less adjacent elements of any configuration. The goal is achieved by introducing into the device the second delay element, the third shift register, the fifth one — the ninth AND elements and the NAND element. 2 Il.

Description

The invention relates to automation and computer technology, in particular, to devices for selecting image contours.

The purpose of the invention is to improve the accuracy of the device.

FIG. 1 is a block diagram of a device for selecting informative elements of an image contour; in fig. 2 - electronic window, implemented in the device.

The device contains a scanning photo receiver 1, a threshold element 2, the first delay element 3, synchronizer 4, the generator 5 clock pulses, the first 6, the second 7 shift registers, the second delay element 8, the third shift register 9, the first 10, the second 11 , third 12, fourth 13, fifth 14, sixth 15, seventh 16, eighth 17 elements AND, AND-NO 18 element, ninth element And 19, ommutator 20 and video control unit 21.

The device works as follows.

The image is projected onto a scanning photodetector 1, which converts this image into a video signal, which from the output of the photodetector enters the threshold element 2, where two-level amplitude quantization is performed. The quantized video signal is input to the first delay element 3, which delays it by a time equal to the length of the scanned image line and to the information input of the first shift register 6. The signal from the output of the first delay element 3 is fed to the input of the second delay element 8, which delays it by a time equal to the length of the scanned image line and to the information input of the second shift register 7. The signal from the output of the second delay element 8 is fed to the information input of the third shift register 9. The operation of the photodetector 1, the 5-clock pulse generator and the video monitoring unit 21 is synchronized with standard horizontal and vertical sync signals.

with

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clock pulses from the corresponding outputs of the synchronizer 4. The clock pulse generator 5 generates a sequence of clock pulses, the phase of which is synchronized by the synchronizer lower and vertical clock pulses of the synchronizer 4. From the generator output 5 clock pulses, the clock pulse sequence arrives at the clock inputs of the first 6, second 7 and third 9 shift registers. The video signals of the three adjacent lines of the image arriving at the information inputs of the first 6, second 7 and third 9 shift registers are time-quantized under the influence of clock pulses. In this case, at the outputs of the first three bits of the first 6, second 7 and third 9 shift registers, an electronic window 3x3 in size (Fig. 2) of the decomposition element is sequentially moved through the image during the frame.

As can be seen from FIG. 1, from the output of the first to the third shift registers, the signals of the decomposition elements of the electronic window (Fig. 2) are fed to the corresponding inputs of the first 10, second 11, third 12, fourth 13, fifth 14, sixth 15, seventh 16, eighth 17, ninth 19 AND elements and NAND element 18. If the electronic window is on the border of the image with the background, i.e. on the contour, this corresponds to the fact that three adjacent elements adjacent to each other have a Unit signal (the Unit signal corresponds to the object image, the Zero signal background) and the Central element has a Unit signal. If all Adjacent Elements have a Unit signal, i.e. the window is inside the image, then at the output of the element AND-HE 18 a signal Zero is obtained, which prohibits the passage of single signals at the output of the elements I.

The code obtained at the outputs of the first 10, second 11, third 12, fourth 13, fifth 14, sixth 15, seventh 16 and eighth 17 elements AND, allows to determine the presence of corner and rectilinear contour elements.

From the outputs of the first eight elements, And signals are sent to the information inputs of the switch 20, which makes (in accordance with the applied operator to the control inputs an eight-bit binary code) any combination of types of informative contour elements. The signals from the switch output are fed to the input of the video monitoring unit 21. Which displays the highlighted informative elements of the image contour.

The use of the proposed device in comparison with the known one allows one to determine not only linear and angular elements, but also to determine the angle, k

which element belongs to: for example, if only one of the outputs of the first eight elements gives a unit signal, it means that the angle to which the central element belongs

window is equal to 90 °, and depending on the output of which element AND the “Unit” signal appears, the direction of this angle can be determined. If at the outputs of two adjacent elements And there is a signal

The unit, then the angle to which the element belongs, is equal to 135 °, and so on.

If a background appears in the form of three or fewer adjacent elements of any configuration, then the proposed device does not take this interference as an object, i.e. will filter out.

Claims (1)

Apparatus of the Invention A device for selecting informative elements of an image contour, comprising a scanning photodetector, a threshold element, a delay element, a synchronizer, a clock pulse generator, the first and second shift registers, the first the second, third and fourth elements And, the switch and the video monitoring unit, the first and second outputs of the synchronizer are connected to the first and second synchronization inputs of the scanning photoreceiver, clock generator and video monitoring unit, the output of the scanning photoreceiver is connected to the input of the threshold element, the output of the threshold element is connected to the information input of the first shift register and with the input of the delay element; the output of the delay element is connected to the information input of the second shift register; the output of the generator The clock pulse is connected to the control inputs of the first AND second shift registers, the switch output is connected to the information input of the video monitoring unit, the outputs of the first to fourth elements I are connected respectively to the first to fourth information inputs of the switch, the control input of which is the control input of the device characterized in that, in order to increase the accuracy of the device, the second delay element, the third shift register, the fifth, sixth, seventh, eighth and ninth elements AND are entered into it AND-NO element, wherein the first output of the first register sdyiga connected to the first input of the first element I. third input of the seventh And, the second input of the eighth element is AND and the first input of the NAND element, the second output of the first shift register is connected to the first input of the second element AND, with the second input of the first element And, with the third input of the eighth element And and the second input of the element I- NOT, the third output of the first shift register is connected to the first input of the third element AND, the second input of the second element AND, the third input of the first element AND, and the third input of the AND-NOT element, the first output of the second shift register connected to the first input of the eighth element AND with the second input of the seventh And element, with the third input of the sixth And element and with the eighth input of the IS-NOT element, the second output of the second shift register is connected to the second input of the ninth And element, the third output of the second shift register is connected to the first input of the fourth element And the second input of the third element And, with the third input of the second element. And with the fourth input of the NAND element, the first output of the third shift register is connected with the first input of the seventh AND element, with the second input of the sixth And element, with the third input of the And fifth element and with the seventh input of the Y-NE element. the second output of the third shift register is connected to the first input of the sixth And element, to the second input of the fifth And element, to the third input of the fourth And element, and to the sixth input of the AND-NOT element, the third output of the third shift register is connected to the first input of the fifth And element, with the second input of the fourth element I, with the third input of the third element I and with the fifth input of the element NAND, the output of the element NAND is connected to the first input of the ninth element I, the output of the ninth element I connected to the fourth inputs of the first, second, third, fourth, n In addition, the sixth, seventh and eighth elements And, the outputs of the fifth, sixth, seventh and eighth elements And are connected respectively to the fifth, sixth, seventh and eighth inputs of the switch, the output of the first delay element is connected to the input of the second delay element, the output of which is connected to the information input of the third shift register, the control input of which is connected to the output of the clock generator.