SU1149288A1 - Device for reading and determining the area of contour images - Google Patents

Abstract

A DEVICE FOR READING AND DETERMINING CONNECTING IMAGES SHCHADA, containing a synchronous generator, the first output of which is connected to the input of the pulse generator and the first trigger input, connected to the inputs of the nerve element And the output of which is connected to the input of the counter, the second output of the synchronous generator is connected the input of a television sensor whose output is connected to one at the inputs of a quantizing element of a signal in two levels, the second input of which is connected to the output of a generator ipmuls ator, and the output with the input of the first delay element connected in series with the second element AND, the first OR element, the second delay element and the third AND element whose output is connected to one of the inputs of the first OR element, distinguishes it with , in order to increase accuracy, it contains an element of the IS1 SUSHEME SCHW, the output of which is connected to the second setup input of the trigger, n the third delay element connected in series, the fourth AND element, the second OR element, the fourth delay element (Lk and And element, the output of which is connected to one of the inputs of the second OR element, and the input of the third delay element is connected to the output of the first delay element, corresponding to the inputs of the second, third, fourth and fifth elements 4i and tsD AND connected to the element output by two signal quanta m, and the inputs of the EXCLUSIVE OSHIE element ISH 00 00 are connected respectively to the outputs of the first and second OR elements.

Description

The invention relates to automation and computing, in particular, to devices for reading the measurement of the geometric parameters of objects, and can be used to create television automatic image analysis systems that allow you to measure the image area of an object with a boundary contour line of any complexity for one period. frame scan. A device for reading ININ and measuring parameters of objects is known, which contains a television sensor connected to a signal quantization element in two levels, element I connected to the output of a clock generator connected to a clock generator. A counter is connected to the output of the element And for measuring the area of the scanned volume. A shift input of the shift register is connected to the output of the signal quantization element in two levels, the setup input of which is connected to the output of the scanning start sensor via the OR element, the second input of which is connected to the output of the additional element I. The first code bit of the shift register is connected to the second input of the AND element , the output of the second register bit is connected to the third input of the AND element, as well as to one of the inputs of the additional AND element, the second input of which is connected to the output of the scanning start sensor, and the third one to you Odom signal completion of scanning of the same lj sensor. The disadvantage of this device is the presence of errors in measuring the area at the points of inflection restricting it to the contour line, in which the scanning direction is relative to it. The closest in technical essence to the present invention is a device for reading and determining the area of contour images containing a synchronous generator, the first output of which is connected to the input of the pulse generator and the first installation input of the trigger, the output of which and the output of the pulse generator are connected to the inputs of the first element And the output which is connected to the counter input, the second sync generator output is connected to the input of a television sensor, the output of which is connected to one of the inputs of the signal quantization element ala by two levels, the second input of which is connected to the output of the pulse generator, and the output to the input of the first delay element connected in series with the second element AND, the first OR element, the second delay element and the third AND element whose output is connected to one of the inputs of the first element OR 2. A disadvantage of the known device is the low measurement accuracy, which is explained as follows. When a defective line appears, i.e. lines with an odd number of elements of the contour line, the first trigger is triggered by the signals of the elements of the contour line that are delayed for the horizontal scanning period. On all subsequent defective lines, this trigger is triggered by the signals of the contour line elements of the last (before the defective) and non-defective line circulating in the second delay element. Thus, in each defective line, the number of counting pulses received at the area measurement counter does not correspond to the true value, since instead of signals of the contour line of the defective line, signals of the contour line of the previous line are used. The aim of the invention is to increase the accuracy of the device. This goal is achieved by the fact that a device for reading and determining the area of contour images containing a synchronous generator, the first output of which is connected to the input of the pulse generator and the first installation input of the trigger, the output of which and the output of the pulse generator are connected to the inputs of the first element And whose output is connected to the input the counter, the second output of the clock generator is connected to the input of the television sensor, the output of which is connected to one of the inputs of the quantization element of the signal by two levels, the second input to then connected to the output of the pulse generator, and the output to the input of the first delay element connected in series with the second AND element, the first OR element, the second delay element and the third AND element, the output of which is connected to one of the inputs of the first OR element, contains the EXCLUSIVE element OR, the output of which is connected to the second setup input of the trigger, and the third delay element connected in series, the fourth element AND the second element OR, the fourth delay element and the fifth AND element, the output of which is Connected to one of the inputs of the second OR element, and the input of the third delay element is connected to the code of the first delay element, the corresponding inputs of the second, third, fourth, and fifth And elements are connected to the output of the signal square element in two levels, and the inputs of the EXLETE element OR are connected respectively to the outputs of the first and second elements OR, FIG. 1 shows the structures of the scheme of the device in FIG. 2 - time diagrams that show his work. The device (Fig. 1) contains the body sensor 1, connected to the synchronous generator 2 and connected to the signal quantization element 3 on two levels, trigger 4, the installation input of which is connected to the output of the synchronous generator 2, the generator 5 pulses, also connected to the synchronous generator 2 , the first element And 6, the inputs of which are connected to the output of the trigger 4 and the output of the generator 5, also connected to the second input of the element 3. The output of the first element And 6 is connected to the counting input of the counter 7, the output of the element 3 is connected to the first delay element 8, second R oh 9 and tr) to to elements And, to the outputs of which through the first element OR 11 a second delay element 12 is connected, the output of which is connected to the second input of element And 10. To the output of the first delay element 8 is connected a second input of element 9 and the third element 13 delays The device also contains the fourth 14 and fifth 15 elements connected to the output of element 3, and the fourth element t7 is connected to the outputs of the KOTopiflc via the second element 16 of the WL 16, the axis of which is connected to the second input of the element 15, and the second input of the element 14 and 14 connected to the output of the three rd delay element 13. Element 18 EXCLUSIVE OR is connected to the outputs of the OR elements 11 and 16, the output of which is connected to the counting input of the trigger 4. The first delay element 8 delays the input signal for a time equal to T, T, -J, where T is the horizontal expansion period, - the duration of one discretization element of the television raster. The second 12 and fourth 17 elements delay the signal by the Third element, time T, delays the signal for a time — o l - Z b. The device works as follows. The video signal from the sensor 1, synchronized by the synchronizing generator 2, is fed to the input of the element 3, which forms the output signals of the object’s contour line normalized in amplitude and duration at the output. This signal can be generated from the video signal of sensor 1 by aligning the front of the figure. A contour line signal can be recorded in a memory device, for example, using a light pen, or another coordinate remover (not shown). In this case, the operator defines the boundary of the object. Horizontal sync pulses (FID) from sync generator 2 are fed to the setup input of trigger 4, it is reset to the initial state before the start of the horizontal scanning. The FID triggers a trigger 5 pulses, which generates raster line discretization pulses, which are simultaneously counting pulses for measuring the area of an object bounded by a connecting contour line. Let us consider (Fig. 2) how the signals arriving at the counting input of the trigger 4 are formed, which, as in the known device, is triggered, through the first element 6 and the generator 6 pulses pass to the counter 7 measuring the area of the object. For convenience, the timeline diagrams of the contour line are given above each of the six lines that it borrows, and the sections of the contour line that reach the corresponding I1 line of the television raster are allocated as dark elements. From the output of the element 3, the video signal of the object contour line (Fig. 2a) The first delay element 8 arrives and then the third delay element 13 from the outputs of which signals are delayed respectively for time C and T + o is removed (Fig. 26 and g). Since the work of the two groups of elements 9-12 and 14-17 is identical, we consider only the first group 9-12 work. From the output of the first element 8, the delays are pulsed (Fig.26 enters the input of the element 9, the second input of which receives the signal of the contour LIN. Since the And 9 element compares the pulses of the contour line of the current line and the line of the previous one, shifted by one raster discretization element, then at its output there appear pulses (4yng. 2c) if the descending branch of the contour line is directed to the left. vertically out from (4-6 lines), the signals of the circuit are formed by the element And to (Fig. 2e), to one input of which the signal is output from the element 3 (Fig. 2a), and to the other through the delay element 12 (Fig. 2d) contour pulses, selected in the previous line.The vertical section of the descending branch of the contour line can be of any length (of course within the raster), since the impulse, selected in the previous line, through the item ШШ11 (Fig. 2e) and the delay element 12 re-enters the second input of the element AND 10. In a similar manner, elements 14 to 17 allocate portions of the downward branch of the contour line, direction 8 to the right and down. Timing diagrams (Fig, 2) display the signals from the outputs: element And 14 (fig, 2h), element And 15 (fig, 2k), element OR 16 (fig, 2l), delay element 17 (fig, 2i), C the elements OR 11 and 16 pulses (figs, 2e, l) arrive at the inputs of the element EXCLUSIVE OR 18, which forms two pulses in each measuring line (fig, 2m). Unlike the known device, there are no defective lines: the number of pulses ( fig, 2m) is always an even number. These pulses then go to the counting input of the trigger 4, which forms a strobe signal (Fig 2n), during which counting pulses from the generator 5 arrive at the input of the counter 7 through the element 6, the number of these counts per frame is proportional to the area of the figure enclosed inside the contour line. In general, the measurement accuracy compared with a limestone device increases with the number of defective lines per total number of lines occupied by an object. For example, for the object depicted in FIG. 2, a strobe signal (FIG. 2n) on lines 2 and 3 would not form in the known device and the area of the object would be measured equal to 11 raster discrete elements. The proposed device measures the actual area of 19 elements, while the accuracy is increased by 40%. Thus, by eliminating the errors associated with the appearance of defective lines, the proposed device has greater accuracy.

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Claims (1)

DEVICE FOR READING AND DETERMINING AREA FOR CONTOUR IMAGES, containing a synchronizer, the first output of which is connected to the input of the pulse generator and the first installation input of the trigger, the output of which and the output of the pulse generator are connected to the inputs of the first element And, the output of which is connected to the counter input, the second output of the generator with the input of a television sensor, the output of which is connected to one of the inputs of the quantization element of the signal at two levels, the second input of which is connected to the output of the generator pulses, and the output - with the input of the first delay element connected in series with the second AND element, the first OR element, the second delay element and the third AND element, the output of which is connected to one of the inputs of the first OR element, characterized in that that, in order to improve accuracy, it contains an EXCLUSIVE OR element, the output of which is connected to the second installation input of the trigger, and the third delay element, the fourth AND element, the second OR element, the fourth delay element, and the fifth element are connected in series And, whose output is connected to one of the inputs of the second OR element, and the input of the third delay element is connected to the output of the first delay element, the corresponding inputs of the second, third, fourth, and fifth AND elements are connected to the output of the signal quantization element in two levels, and the inputs of the EXCLUSIVE element OR connected respectively to the outputs of the first and second elements OR. > ί 1,149,288