SU1640723A1 - Plane figures geometrical sizes meter - Google Patents

Abstract

This invention relates to automation and computing. The purpose of the invention is to expand the functionality by determining the area of overlap of a flat figure with a given mask. The mask image stored in the memory unit is point-by-point compared on the AND element with the input image. The number of matched elements is summed up in the counter. 2 Il.

Description

The invention relates to automation and computing and can be used to create systems for the automatic analysis of graphic information.

The purpose of the invention is to expand the functionality of the device by determining the area of overlap of a geometric figure with a given mask.

FIG. 1 shows a block diagram of a device for measuring geometrical parameters of flat figures; in fig. 2 - switch.

The device contains serially connected generator 1 clock pulses, switch 2, matrix of 3 photodetectors, switch 4, three three-bit shift registers 5-7, element AND-HE 8, element 9, counter 10, counter 11, counter 12, block 13 TI, element And 14 and counter 15.

Switch 4 contains the shift registers 16 and 17 and switch 18.

The device works as follows

Using switch 4, the shift registers 5-7 record fragments of the entire image in turn consisting of a central point and its surrounding points, with the second output of the shift register 6 repeating the state of all the image points. To provide such a mode, signals corresponding to three rows are removed from the outputs of switch 4. The shift registers 16 and 17 of the switch 4 (Fig. 2) delay the previous two with respect to the current line. Analyzing the state of the points surrounding the selected one, it is determined whether the selected point is located on the image contour. If the point does not belong to the contour of the figure of the figure, but is inside the figure, then all the surrounding points have a single value (assuming that the points of the image of the figure are encoded with a single value), while at all inputs of the AND-NOT element

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units, and the output is zero, and the pulses from the second output of the shift register.6 do not pass to the input of the counter 10. If the selected point does not belong to the contour and is not inside the figure, then all the surrounding points have a zero value, while on all inputs the NAND element is zero, and the output is a logical one, but since the selected point itself has a zero value, the second output of the shift register 6 of the pulse does not work, and the state of the counter 10 does not change. If the selected point belongs to the contour of the image of the figure, then at least one of its surrounding points corresponds to the zero signal at one of the outputs of the shift registers 5-7. At the same time, the output level of the AND-HE element 8 is high, and since at this point in time one is removed from the second output of the shift register b, the state of the counter 10 increases. After polling all the points in the counter 10, there will be a code corresponding to the number of points lying on the contour of the figure.

Since the state of all image points is sequentially reproduced at the second output of the shift register 6, the state of the counter 10 at the end of the frame corresponds to the number of image points of the figure, i.e. its area.

Determining the area of a part of a geometric figure that lies inside the mask is performed using a counter 12, a memory block 13, an AND element 14 and a counter 15. In a memory block 13, a mask image is stored that can have an arbitrary shape (depending on the problem to be solved). The counter 12 starts scanning the cells of the memory block 13 in the course of the sweep. At those points in the image where the mask is recorded, a high level is taken from the output of the memory device, which permits the passage of pulses from the second output of the register 6 to the counter 15. Thus, in the counter 15, at the end of the frame a code is formed that corresponds

the number of image points of the figure coinciding with the mask elements, i.e. the area of the part of the geometric figure that lies inside the mask is determined.

Claims (1)

Invention Formula A device for measuring the geometrical parameters of flat figures, comprising a matrix of photodetectors, to the vertical tires of which are connected the outputs of the first switch, and for horizontal buses - the inputs of the second switch, the control inputs of both switches are connected to the output of the clock generator and the control the inputs of three shift registers whose information inputs are connected to the corresponding outputs of the second switch, the outputs of the first and third bits of the second shift register and the outputs of the first and third shift registers are connected to the inputs of the NAND element, the output of which is connected to the first input of the first element And, the second the input of which is connected to the output of the second bit of the second the shift register and the counting input of the first counter, and the output is connected to the counting input of the second counter; the outputs of the counters are the first and second outputs of the device, respectively, characterized by the fact that, in order to expand the functionality by determining the area of overlap of a flat figure with a given mask, it contains the third and fourth counters, the memory block and the second element I, the counting input of the third counter is connected to the output of the clock pulse generator, and the installation input to O is connected to the installation output of the first switch; with the counting input of the first counter, and the output with the counting input of the third counter, the output of which is the third output of the device. one t one 7 ha oh "Ъ "but I CM i L GE i SN / Glg and R FIG. 2