SU1737471A1 - Device for separating image contour - Google Patents

Abstract

The invention relates to the field of automation and computer technology and is intended for reading graphic information and images, in particular, can be used in robots technical training systems. The purpose of the invention is to improve the accuracy of the device. A device for separating the image contour contains a matrix of image processing cells, each cell containing a photoreceiver element, a resistor, two OR elements, two AND-NOT elements and an I. The data cells can be combined into a uniform matrix of arbitrary sizes. Effective removal of impulse noise is achieved by including a resistor, an OR element and an NAND element 6 in the cell of the device. (Ls

Description

The invention relates to automation and computer technology and is intended for reading graphic information or images, in particular, can be used in technical vision systems.

A device is known for separating the contour of an image, which contains a matrix of photosensitive elements, OR elements, two-input anti-matching elements, and OR elements are located between anti-matching elements, which in turn are located between photosensitive elements, the output of each matrix element of photosensitive elements is connected to the corresponding inputs anti-coincidence adjacent to this photosensitive element, the inputs of each element OR are connected to

outputs of anti-coincidence elements adjacent to this element OR.

A device for isolating an image contour is known which contains a memory element, an AND-NOT element, a photo-receiving element and an AND element, where the output of the AND element is connected to the first input of the memory element, the first input of the AND element is connected to the output of the AND-NOT element, and the second the input is with the output of the photodetector, the inputs of the NAND element of each image processing cell are connected to the corresponding photoreceiver elements of the adjacent cells.

The disadvantages of these devices are low accuracy.

Closest to the present invention is a device for separating an image contour, containing an array of image processing cells, each of which consists of a photodetector element, VI

CO VI

And, the first input of which is connected to the output of the photodetector element, and the output is the output of the device, the element AND- NOT, the inputs of which are connected to the corresponding outputs of the photodetector elements of adjacent cells, and the output connected to the second input of the element AND, the element OR, the inputs which is connected to the corresponding outputs of the photodetector elements of adjacent cells, and the output is connected to the third input of the element I.

The disadvantage of the prototype is low accuracy.

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

The goal is achieved by the fact that a device comprising an array of image processing cells, each cell of which contains a photo-receiving element, an OR element, an AND element and an AND-NOT element, further comprises a second OR element and a second AND-NOT element.

The proposed device also contains the second element OR and the second element NAND.

FIG. 1 shows a block diagram of an apparatus for outlining an image; Fig. 2 is a diagram of the arrangement of adjacent cells relative to the central cell; in fig. 3 — an object whose image is projected onto a matrix of photoreceiving elements; in fig. 4 - a noisy image that is obtained at the third output of the device; in fig. 5 - filtered image on the second output of the device; in fig. 6 - contour filtered image on the first output of the device.

The device for selecting the contour of the image contains a matrix of isobargeneous cells 1, each of which contains a photodetector element 2, the element OR 3, the element AND-NE 4, the element OR 5, the element AND 6, the element AND-NOT 7, the first group of inputs 8, the second a group of inputs 9, the first output 10, the second output 11 and the third output 12,

The device works as follows

The image of the object (Fig. 3) is projected onto the matrix of the photodetector elements 2. At the output of the photoreceiver element 2, on which the image of the object falls, the signal O is received, and at the output of the photoreceiver element, which does not receive the image of the object, signal 1 x signal 1 corresponds to the first square, and signal O - white square),

FIG. 4 shows a noisy image that is obtained at the outputs.

12 cells 1. Signals with the output of photodetector elements are fed to the inputs of 8 adjacent cells 1 and to the second input of the element AND-NO 4 of this cell 1. As a result, at the outputs of 11 cells 1, we get FO signals that can be described by the following formula:

F0 Xo (Xl + X2 + X3 + X4),

where Ho is a binary signal, at the output 12 of this cell 1 (Fig. 2).

X1, X2, Xs, X4 - binary signals at the outputs of 12 adjacent cells 1.

As can be seen from (1), Fo will receive the value of O only when X0 1 and one of XL Xg, Xs and Xd. is equal to 1, and in the remaining cases x FO 0, i.e. when a single-element interference image hits a cell, it is filtered out. As a result, at the outputs 11 of the device, we obtain an image, which is shown in FIG. 5.

The signal from output 11 is fed to the inputs 9 of adjacent cells 1 and to the third input of element AND 6. At output 10, cell 1, signal 1 is received only when signals from all three inputs of element And 6 receive signals 1. At output of element 6, a signal is received which can be described by the formula:

Fv

Fo (F2-F2-F3-N (Fi + F2 + F3 + F4),

where F10 is a binary signal at the output of the element AND-NOT 4;

FI, F2, Fa, F4 - binary signals, at the outputs of 11 adjacent cells 1, which are fed to the inputs 9.

According to this formula, on the logic elements 5, 6, and 7, the condition of ownership of each of the image elements of the contour and the filtering of single element interference on the background is checked (Fig. 6).

Thus, the selection of the contour of the binary image occurs and it is filtered from interference.

The proposed device, in comparison with the known one, allows filtering of single element interference of type 1 and O, i.e. type 1 noise on the background and type O noise on the image of the object, which leads to an increase in the accuracy of selection of the image contour,

Claims (1)

Invention Formula A device for extracting an image contour containing an array of image processing cells, each of which contains a photodetector, an AND element, an OR element and an NAND element, an OR element output connected to the first input of the AND element, an output of the NID element — to the second input of the element And, the inputs of the element OR are connected to the corresponding inputs by the elements AND-NOT, the output of the element AND is the first output of the image processing cell, characterized in that, in order to improve the accuracy of the device, each image processing cell contains the second elements OR and AND-NOT, and the output of the second element AND -NON connected to the third input of the AND element and is the second output of the image processing cell, the output of the second element OR 0 - with the first input of the second element IS-NOT, the output of the photodetector element — with the second input of the second element AND — NOT and is the third output of the image processing cell, the inputs of the first element OR are connected with the corresponding second outputs of the adjacent image processing cells, the inputs of the second element OR — with the corresponding third outputs of the adjacent image processing cells. 1 0u2 Fig.z FIG. four f g v i 5 6 I