SU1168978A1 - Device for selecting elements of contour image - Google Patents

Abstract

A DEVICE FOR SELECTION OF ELEMENTS OF THE CONTOUR IMAGE, containing a matrix of photodetector elements connected to the first and second scanners, whose inputs are connected to the clock generator, the first delay unit connected to the clock generator and the second scanner unit, and the first group of delay elements, alone the inputs of which are: ff: “are connected to the clock generator, the others are connected to the corresponding outputs of the second scanner, while the first delay unit is connected to the inputs of one They are the BANNER elements of the first group, characterized in that, in order to improve the accuracy of the device, it contains a second delay unit, the inputs of which are connected to the outputs of the second scanner and the clock generator, the first OR element, the inputs of which are connected to the outputs of the BANNER elements of the first group , the second group of BANKS, the inputs of which are connected to the clock generator, to the outputs of the second (L scanner and to the outputs of the first C and second delay units, and the second OR element, whose inputs are connected with the outputs of the BANNER elements of the second group, while the output of the second delay unit is connected to the inputs of the BANNER elements of the first group, and the second output of the second block of the scanner is connected to the inputs of other BANNER elements of the first group. 00

Description

The invention relates to automation and computing, in particular to devices for reading and processing graphic information.

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

FIG. 1 shows a block diagram of a device for selecting contour image elements; in fig. 2 is a block diagram of a vertical scanning unit.

The device includes a matrix of 1 photodetector elements 2 connected to vertical 3 and horizontal 4 tires, the first 5 and second 6 blocks of horizontal and vertical scanning, respectively, the first 7-10 and the second 11-14 groups of the BAN elements, the generator 15 clock pulses, the first 16 and the second 17 delay blocks, the first 18 and second 19 elements OR. FIG. Figure 1 also shows images 20, memory block 21, and adder 22.

Block 6 (Fig. 2) contains the first 23 and second 24 groups of keys and the shift register 25, and also has outputs 26 and 27.

The selection of the elements of the contour of the image 20 projected onto the surface of the matrix 1 is carried out by comparing each element. The signals from the array of matrix elements, two of which are on the same line, and the two adjacent to the first, are adjacent to the first line. . According to the results of this comparison, the character of the tilt of the image border 20 is determined. If at the time of comparison only one of the four matrix elements is lit, and the other three are not lit, a tilted border is fixed, if at the time of comparison two elements of the same column are lit, and both adjacent elements of the adjacent column are not illuminated, fixed vertically to the border, if at the time of comparison two elements of the same row are illuminated, and both adjacent elements of the adjacent row are not illuminated, the horizontal border of the image is fixed 20. Blocks 5 and 6 provide a sequential parallel scan of two adjacent rows of the matrix, which is carried out (Fig. 2) with the help of keys 23 of the first group of block 6, which, when sequentially appearing

pulses at the outputs of the controlled generator 15 of the shift register 25, alternately connect horizontal tires to the first or second outputs of block 6. Blocks 16 and 17 operate in such a way that during scanning of the corresponding elements of adjacent rows of the matrix, information about signals from preceding elements of the same lines.

Thus, in the course of the sweep, at the first output of block 6 there is a signal from the element of the current line being developed at the moment,

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the current element of the current line, at the output of the first delay block 16 - from the previous element of the next line and at the output of the second delay block 17 - from the previous element of the current line.

The signals generated by the matrix are two-level: for example, 1 when scanning element 2 when its area is fully illuminated or more than half, and O when scanning element 2 when its area is not illuminated or less than half illuminated.

If there is an inclined boundary, the image 20 of the generator 15, which is fed to the control inputs of the elements of the BAN 11-14, appears. the output of only that of the BANNER elements, to all inverse inputs of which at this moment of the scan, a signal O is given, and a signal 1 is sent to the direct input. That is, the signal of the generator 15 at the output of the BAN 11 element appears only when The direct input receives the signal 1, and the inverted inputs receive the signal O. The signal of the generator 15 at the output of the prohibition 12 appears only when the signal 1 arrives at its direct input and the signals O are fed to the inverse inputs. Similarly, we receive signals at the outputs of the elements. APRET 13 and .14.

If there is a horizontal or vertical border of the image 20, the signal from the generator 15 arriving at the control inputs of the BAN 7-10 elements appears at the output of only that BAN element, for which both direct inputs at this moment of the scan are signals 1, and

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both inverse inputs are signals O, the signal of the generator 15 at the output of the BAN 9 element appears only when signals 1 are received simultaneously at both of its direct inputs, and signals O are received at both inverse inputs. Similarly, we receive signals at the outputs elements BAN 8 and 10.

Thus, the signals of the generator 15 at the output of the BANKS 11-14 elements appear only when the scanner passes through the inclined border of the image 20, and at the output of the BANKS 7-10 elements only when the scanner runs of the horizontal or vertical border of the image 20, and at each instant A signal appears at the output of only one of the elements. BAN 7-14. Further, the signal from one of the elements of the BANKS 7-10 of the first group enters the element OR18 or from one of the elements of the PROHIBITION 11-14 of the second group - to the element OR 19.

Thus, the vertical and horizontal signals are output through the OR element 18, and the signals of the inclined elements of the image contour, which are extracted during the transition / scan of the image boundary 20, are output through the OR element 19.

To measure the perimeter of the figure in its image, the signals of the elements OR 18 and 19 are applied to the address

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the inputs of block 21, where code l and the root code of two are stored. When a signal is received at block 21 from an element OR 18 and a signal O from an element OR 19, i.e. when a horizontal or vertical image contour is fixed, under the control of the generator 15 at the outputs, block 21 receives signals of code 1, which are fed to accumulating adder 22, and 1 is added to the value stored in it.

When a signal O is received from block OR 18 at block 21, and signal 1 is received from element OR 19, i.e. when an oblique contour element of the image is fixed, under the control of the generator 15, the signals from the square-root code of two of the two appear at the outputs of block 21 and are fed to the accumulating adder .22. Thus, during the sweep time of the entire matrix in the accumulating adder 22, the fixer is a value whose numerical value is perimeter of the image is -20, and multiplying it by the step size a between the matrix elements at the output of block 22, we get the perimeter of the image of the figure on the photodetector surface.

The introduction of new assemblies and elements, as well as new constructive connections, made it possible to significantly improve the accuracy of the device.

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Claims (1)

DEVICE FOR SELECTION OF ELEMENTS OF THE CONTOUR IMAGE, containing a matrix of photodetector elements connected to the first and second scan units, the inputs of which are connected to a clock generator, a first delay unit connected to a clock generator and a second scan unit, and a first group of FORBID elements the inputs of which are connected to the clock generator, others are connected to the corresponding outputs of the second scan unit, while the first delay unit is connected to the inputs of some elements PROHIBITION of the first group, characterized in that, in order to increase the accuracy of the device, it contains a second delay unit, the inputs of which are connected to the outputs of the second scan unit and clock generator, the first OR element, the inputs of which are connected to the outputs of the elements of the PROHIBITION of the first group, the second a group of FORBID elements, the inputs of which are connected to a clock pulse generator, to the outputs of the second scan unit and to the outputs of the first and second delay units, and the second OR element, whose inputs are connected to the outputs of elements 3 APRET of the second group, while the output of the second delay unit is connected to the inputs of the BAN elements of the first group, and the second output of the second scan unit is connected to the inputs of the other BAN elements of the first group.