SU1597888A1 - Device for processing images of objects - Google Patents

Abstract

This invention relates to technical cybernetics and can be used in digital image processing systems. The purpose of the invention is to expand the field of application of the device due to the possibility of performing filtering with sliding order statistics. This is achieved by introducing a third switch and a fourth register, which allows for percentile filtering of the image. 1 il.

Description

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This invention relates to technical cybernetics, in particular, to digital image processing systems.

The aim of the invention is to expand the field of application of the device due to the possibility of filtering with sliding order statistics.

The drawing shows a diagram of the device.

The device (Fig. 1) contains a television sensor 1, an analog-digital converter 2, a shaper 3 apertures, a generator of 4 pulses, a group of 5 elements 6, a first register 7, a control block 8, a block 9 of code sorting, a second register 10, the first switch 11, the computing unit 12, the comparator 13, the third register 14, the second switch 15, the first 16, the second 17 and the third 18 inputs of the device, the third

switch 19, fourth register 20, 2 fourth device 21 input.

The image processing device implements percentile filtering, of which medial filtering is a particular case, and performs the following functions:

f, (i. j)

II, x (r, ha) J 0, x (r, m): t /

f2 (i, j)

Jx (r, m), | x (r, m) - g (i,) h,

(gCi, J), 1k (g, m) - g (i, j), where f (i, j) is the output image

devices; x (r, m) is partial

statistics which

 defined as a partial value of the data of m numbers 5 tons of aperture, for which, in particular, x (1, t)

 min

X (Xm + 1) / 2, m J Median (x), and x (t, t) max,

g (i, j) is the current image element at the input of the device; сГ - threshold value.

In addition to the signals f, (i, j) and fj J, depending on the word of the state recorded in the fourth register 20, 20, the signals x (r, t) or g (i, j) can be output to the device.

The device works as follows.

Before the beginning of the percentile filtering of the input image, the mask code is written through the device input 16 into the first register 7. This code determines the area shape (from the neighborhood of the current image element), based on the elements of which the partial order statistics are calculated. If the image element is in the vicinity of the current image element

Codes of elements of the processed image from the outputs of the registers of the aperture generator 3 in parallel arrive at the first inputs of the elements AND 6 of group 5, the second inputs of which simultaneously receive the values of the corresponding bits of the first register 7.

Elements 6 and perform the masking of the codes of the individual elements of the image to select an area of a given shape.

The calculation of the partial order statistics of an array of numbers is equivalent to the sorting of this array and the selection as a partial order statistics of a partial element of a sorted sequence of numbers.

From the outputs of the elements And 6 of group 5, the codes of the elements are fed to the inputs of block 9 sorting. The latter performs parallel-conveyor sorting of the input array m of image elements constituting the aperture,

As a result of pairwise parallel

. the corresponding code bit,,. ° peayji rdi-e uu.mpnu l, ... written in register 7 is equal to 1, in the permutations of the codes of the elements of the image, otherwise - O,.

From the device input 17, the register 10 records the binary code of the number of that information input of the switch 11 dd to which the partial order statistics code of the current pixel sequence is received. This number of the information input of the switch 11 depends on the mode of operation j. The partial number of a given order of order is r T ia tmg TMTS “: -.

device, FROM the contents of the first

on the output of block 9, codes of the sorted array of image elements are formed,

From the output of block 9, these codes are sent to the corresponding information inputs of the switch 11, to the control input of which from the output of register 10 a binary code is applied, determined by the statistics.

Switch 11 and register 10 are used to provide partial order statistics of the current position of the aperture.

register 7 and depending on whether the order of statistics is required,

Through the third device input 18, the third register 14 records the parallel code of the threshold f, which s is compared in the comparator 13 with the parallel code coming from the switch 19,

The processed image in the process of its line-scanning by the television sensor 1 through the analog-digital converter 2 enters

0

five

0

25 ZO

In digital form, the input of the first shift register of the aperture generator 3. When pulses arrive from the generator 4 to the shift control inputs of the aperture generator register 3, a sequential shift of the pixel codes is formed to form a neighborhood of the current image element.

Codes of elements of the processed image from the outputs of the registers of the aperture generator 3 in parallel arrive at the first inputs of the elements AND 6 of group 5, the second inputs of which simultaneously receive the values of the corresponding bits of the first register 7.

Elements 6 and perform the masking of the codes of the individual elements of the image to select an area of a given shape.

The calculation of the partial order statistics of an array of numbers is equivalent to the sorting of this array and the selection as a partial order statistics of a partial element of a sorted sequence of numbers.

From the outputs of the elements And 6 of group 5, the codes of the elements are fed to the inputs of block 9 sorting. The latter performs parallel-conveyor sorting of the input array m of image elements constituting the aperture,

As a result of pairwise parallel

, ° peayji rdi-e uu.mpnu l, ... permutations of the codes of the elements of the image

° peayji rdi-e uu.mpnu l, ... permutations of the codes of the elements of the image

 The partial number of the specified order at the output of block 9 forms the codes of the sorted array of image elements,

From the output of block 9, these codes are sent to the corresponding information inputs of the switch 11, to the control input of which from the output of register 10 a binary code is applied, which determines the partial number of the specified order of r T ia tmg tmts ": -.

howl statistics.

Switch 11 and register 10 are used to provide partial order statistics of the current position of the aperture.

Block 8 controls the process of sorting an array of image elements in block 9 of sorting codes.

At the output of block 12, a binary code is formed of the modulus of the difference between the values of the partial order of the statistics of the neighborhood of the current element and the current value of the central element of this region. This two

The difference modulus code is fed to one input of the switch 19, to the other input of which a binary code of partial order statistics is supplied. The signal at the output of the switch 19 depends on the code recorded in the control register 20 through the input 21 of the device. Depending on this code, the output of the third switch 19 is either the modulus code of the difference between the values of the partial order statistics of the neighborhood of the current element and the current value of the central element of this area, or the code corresponding to the value of the partial order statistics.

The state of KONiMyTaTopa 15 is determined by the code entered in the control register 20 and by the signal received at the third input of the switch 15 from the comparator 13,

Depending on the state of the control register 20, the output of the device is a signal of either f, (i, j) or f2 (i. J).

Formula of invention

A device for image processing of objects containing serially connected television sensor, analog-to-digital converter and aperture former, pulse generator, AND group, first register, control unit, code sorting unit, second register, first switch, subtraction unit, comparator, third register and a second switch, the outputs of the aperture former are connected to the first inputs of the AND elements of the group, the second inputs of which are connected to the outputs of the first register whose input is the first input ohm devices, element outputs & groups

connected to the information input of the code sorting unit, the first control input of which is connected to the first output of the control unit, the second output of which is connected to the second control input of the code sorting unit, the output of which is connected to the information input of the first switch, the control input of which is connected to the output of the second the register whose input is the second input of the device, the output of the first switch is connected to the first input of the subtractor, the input of the third register is the third input of the device, and the output of the connection Inen with the first information input of the comparator, the output of the pulse generator is connected to the clock inputs of the television

sensor, analog-to-digital converter, aperture imager, control unit and the third register, the second subtractor input and the first information input of the second switch are connected

with the corresponding output of the aperture former, the output of the second switch is the output of the device, the second information input of the second switch is connected to the output of the first switch

The third information input is connected to the switch output, characterized in that, in order to expand the field of application of the device due to the possibility of filtering with sliding order statistics, it contains a third switch and a fourth register, the input of which is the fourth input of the device, and the output is connected to the control inputs of the second and third switches, the information inputs of the third switch are connected to the outputs of the subtractor and the first switch, and the output is connected to the second information th input of the comparator.

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Claims (1)

Claim A device for processing images of objects containing a television sensor, an analog-to-digital converter and an aperture driver, a pulse generator, a group of AND elements, the first '^ 5 register, control unit, code sorting unit, second register, first switch, unit subtraction, a comparator, a third register and a second switch, the outputs of the aperture generator 49 are connected to the first inputs of the elements AND groups, the second inputs of which are connected to the outputs of the first register, the input of which is the first in The device’s output, the outputs of the elements And groups 45 are connected to the information input of the code sorting unit, the first control input of which is connected to the first output of the control unit, the second output of which is connected to the second control input of the code sorting unit, the output of which is connected to the information input of the first switch, control input which is connected to the output of the second register, the input of which is the second input of the device, the output of the first switch is connected to the first input of the subtractor, the input of the third register is I have the third input of the device, and the output is connected to the first information input of the comparator, the output of the pulse generator is connected to the clock inputs of the television sensor, analog-to-digital converter, aperture driver, control unit and third register, the second input of the subtractor and the first information input of the second switch are connected to the corresponding the output of the aperture driver, the output of the second switch is the output of the device, the second information input of the second switch is connected to the output of the first utator, and the third information input is connected to the output of the switch, characterized in that, in order to expand the scope of the device due to the possibility of filtering with moving serial statistics, it contains a third switch and a fourth register, the input of which is the fourth input of the device, and the output is connected with control inputs of the second and third switches, the information inputs of the third switch are connected to the outputs of the subtraction unit and the first switch, and the output is connected to the second information ion of the comparator input.