SU1416975A1 - Device for forming multitone images - Google Patents

Abstract

The invention relates to computing and can be used in systems for precision processing of multi-tone images. The purpose of the invention is to improve the accuracy of recording the tone of a multi-tone image. When using a device for processing multi-tone images, the limitations caused by photometric noise on resolution are eliminated. devices, resulting in a higher accuracy in detecting the tone of the multi-tone image. 3 il.

Description

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The invention relates to computing and can be used in systems for precision processing of multi-tone images.

The purpose of the invention is to improve the accuracy of recording the current of a multi-tone image.

Fig, 1 shows a diagram of the device; in fig. 2 is a control block diagram; in fig. 3 - multiplexer circuit.

The device comprises a scanning unit 1, including a scanning mechanism 2 and an image sensor unit 3, a memory unit 4, a control unit 5, multiplexers 6 and 7, an adder 8, a decoder 9 and a counter 10.

The control unit 5 contains a trigger 11, the inverse output of which is connected to the first input of the element 12, another input of which is connected to a generator of 13 clock pulses, the output of the element 12 and connected to the counting input of the trigger 14, the single output of which is connected to the input of the counter 15 and address The delay element 16, the output of which is one of the outputs of block 5, the bit outputs of the address counter 15 and the zero output of the trigger 14 are other outputs of the control block 5, the counter of the counter 17 of the sum number connected to the transfer output of the counter 15 a The address is the output of the block 5, and the transfer output of the counter 17 is connected to the R input of the trigger 11.

Multiplexer 6 is formed by multiplexers 18-21 ..., the control inputs of which are combined and are the control input of multiplexer 6, the outputs of multiplexer 18-21 are the output of multiplexer 6, the high-level input of multiplexer 6 is connected to the first input of multiplexer 18 , the second input of the multiplexer 19, the third input of the multiplexer 20, etc., the bit input is connected to the first input of the multiplexer 19, the second input of the multiplexer 20, etc., the bit input of n-1 is connected to the first input of the multiplexer 20, the second the input of the multiplexer 21, etc., on the other Gia input multiplexer 18-21 receives 0 const.

The device for processing the image of the scientific research institute operates as follows.

In the initial state, all blocks of the device are in the zero state.

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SRI. On the Start signal from the control computer to the S input of the trigger 11 of the control unit 5, a single signal appears at its single output that allows the clock impulses to pass through the clock generator 13 through the input 12 of the counting trigger 14, as a result what he goes into a single state. At the same time, on the leading edge of the pulse from the trigger 14 of the address counter 15, the address of the first cell of the memory 4 and the first sensor of the image sensor 3 of the scanning unit 1 are formed (the number and numbering of the memory 4 and the image sensors coincide). The contents of the first cell 4 of the memory 4 are read by a pulse from a single output of the trigger 14, delayed by the delay element 16. In this case, it contains a zero value, which, through a multiplexer

7 enters the input of the adder 8. Simultaneously with the process of reading the contents of memory block 4, data A., the tone of the image element comes from the block of 3 image sensors in digital form via a multiplexer

6 to the input of the adder 8. In the adder

8 calculates the first value of the tone of the first image element (which is equal to the value of A), constant from the block of 3 image sensors. On the second clock pulse from the generator 13, the counting trigger 14 goes to the zero state, while the pulse B from the zero output of the trigger 14 records the value B ;, + A | f of the current of the first picture element into the first cell of the memory 4. Similarly, the processing of subsequent elements, the images whose tone value comes from the second and third sensors, are measured. After processing all elements of the image by the signal of the counter 15 of the address input to the counter of the sum number 17, the output of the latter is set to a single signal that arrives at the decoder 9. The decoder 9, implemented according to the OR scheme, works only if the bit received code starting with the lowest one is 1 (for example, 0001, OOP, 0111, etc.).

In this case, the output is decrypted. ra 9 appears, a signal that

enters the counting input of counter 10 and the control input of multiplexer 7, the signals from the output of counter 10 are fed to the control input of multiplexer 6. As a result, multiplexers 6 and 7 carried out the switching of the received tone values of the image element so an external device, the memory unit 4 is zeroed out and the device is ready for processing the next image fragment.

When precision information is transformed from a photo into an even form, random errors of the following are superimposed on the information.

at the same time, in order to shift the output of the numeric-iQ origin: nonstationarity in

The output of the next clock pulse counter address generates the address of the first cell of memory block 4. The signal from the single output of the trigger 14 received through the delay element 16 reads the contents of the first cell of the block 4 memories. The value B, passed multiplexer 7, is divided by 2 to the input of the adder 8. At the same time, the new average value of the first element's tone is obtained at the other input of the adder 8, divided by 2. Thus, the output of the adder 8 produces the first average value of the first element's tone b / + image, which is by impulse c. The inverted output of the trigger 14 of the control unit 5 is recorded in the first cell of the memory unit 4.

Similarly, the first averaged pitch values for the remaining image elements are determined.

With further calculation of the averaged values of the tone of the image elements, the shift of the numbering of the bits on the multiplexer 6 is carried out when signals are received from the decoder 9 to the counter 10, thus dividing by 4, 8, 16, etc. is performed. Shift numbering bits on multiplexer 7, i.e. division by 2 is performed only if there is a single signal from the output of the decoder 9. In the absence of this, the values of the B tone of the image element are fed to the input of the adder 8 without dividing by 2.

Thus, the processing of the image elements is performed before the sum number 17 counter is filled with the selected value N 2. By the signal from the overflow output of the sum number counter 17, which goes to the R input of the trigger 11, the latter is set to the zero state. The signal from the zero output of the trigger 11, the contents of the memory block 4 issued

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the time of the light illumination of the scanning mechanism, the temporal instability of the optical system, caused by vibrations, and the intrinsic noise of the photosensitive elements. The easiest way to deal with the case. tea errors - multiple image acquisition followed by finding the arithmetic average value for each image element. Performing software averaging due to the large amount of data representing the image and the largest amount of computer control RAM requires a considerable amount of computer time, causing the need to be limited to a small amount of summations, about 4, while effective noise suppression requires about 50 summations. The use of the proposed device for image processing allows us to significantly improve the accuracy of the image tone detection, since the number of summations can be set sufficiently large (16, 32, or 64).

Claims (1)

Invention Formula A device for processing multi-tone images containing a memory unit, a control unit, an image sensor unit whose input 5 is a device information input, which is characterized by the fact that, in order to improve the registration accuracy of the tone of a multi-tone image, it contains the first and second multiplexers, an adder, a counter and a decoder, the information input of the first multiplexer is connected to the information output of the image sensor block, exits 5 first and second multiplexers. are connected respectively to the inputs of the first and second terms of the adder, the output of which is connected to the information input of the memory block. five 0 514 the output of which is the information output of the device and connected to the Information input of the second multiplexer, the control input of which is connected to the output of the decoder H by the counting input of the counter, the output of which is connected to the control input of the First multiplexer, the first output ha L p srag. / (rig 2 169756 The control unit is connected to the address input of the memory unit and the sensor address input of the image sensor unit, the second output of the control unit is connected to the information input of the decoder, the first input of the control unit is the device start input. ffSfl..J. 75 / 7 H5 / G. / O fig.Z Editor L.Pcholinsk Compiled by A.Pack Tehred L.Oliynyk Order 4065 / A6 Circulation 704 VYYIPI State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 .eight Proofreader V.Romanenko Subscription