SU1647608A1 - Image transformation device - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used to convert halftone images into bivational images. The aim of the invention is to improve the accuracy of the device. This goal is achieved in that a device containing a photosensitive element, an And element, a trigger, is additionally introduced with a cumulative element, a one-shot, a high-frequency generator, a counter, a key, and a source of reference voltage. By converting the magnitude of the light flux to the duration of the pulses, a high accuracy of the device is achieved. 1 il.

Description

The invention relates to automation and computing technology and can be used for tolerance control, measurement of area, brightness and other parameters of objects.

The aim of the invention is to improve the noise immunity and accuracy of the conversion of low contrast halftone images.

The drawing shows a diagram of the device.

The device contains a photosensitive element 1, a cumulative element 2 (capacitor), one-shot 3, element 4, high-frequency generator 5, counter 6, trigger 7, key 8, reference voltage source 9.

The first contacts of the photosensitive element 1 and the capacitor 2 connected to each other are connected to the first control input of the single vibrator 3, and their second contacts are connected respectively to the second and third inputs of the single vibrator 3, the synchronization input of which is connected to the Reset bus, the output of the single vibrator is connected to the first input element 4, the second input of which is connected to the output of the high-frequency generator 5, and the output of the element 4 and 4 is connected to the input of the counter 6, the output of which is connected to the input of the installation 1 of the trigger 7, the input of the installation th connected to the bus reset, ssedinek inverse output to a control input

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key 8, the information input of which is connected to the output of the source 9 of the reference voltage.

A photoresistor can be used as a reading element. Logic elements (one-shot, element And, trigger) and a counter can be implemented on standard elements.

When light enters the photosensitive element changes its resistance R in accordance with the illumination of the incident flux.

The operation of the device begins with a signal to the bus Reset. This signal is fed to the installation input of the counter 6 and the installation input of the trigger 7 and sets them to zero

the signal belongs to the white level, if its duration O does not exceed the threshold value, or to the black level, if its duration t / is greater than the threshold value. In the latter case, the signal from the output of counter 6 will set trigger 7 to state 1.

The appearance of a pulse at the output of counter 6 indicates that the generated pulse corresponds to a black level. Zero signal from inverted trigger output 7 will close

key 8 and its output signal will not be. Consequently, depending on the number of pulses at the output of the element And 4, determined by the illumination of the incident flux on the photosensitive

condition. The signal from the inverse output JQ is a meaningful element 1, at the output of the key

generator 7 is fed to the control input of the key 8 and opens it. As a result, the signal from the source 9 of the reference voltage through the key 8 passes to the output of the device. The Reset signal is also a clock for the one-shot 3.,

When a signal arrives at the synchronizing input of the one-shot 3 at its output, a pulse of duration Ј is produced, and Ј is determined by the resistance R of the photosensitive element 1.

Consequently, the pulse duration is determined by the illumination of the incident luminous flux. Increasing the luminance of the incident luminous flux leads to a decrease in the resistance R of the photosensitive element.

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Claims (1)

8 either the signal disappears or not. Invention Formula An image conversion device comprising a photosensitive element, an And element, a trigger, characterized in that, in order to improve accuracy, a cumulative element, a one-shot, a high-frequency generator, a counter, a key and a reference voltage source are additionally introduced, and the outputs of the photosensitive element connected to two installation inputs of the one-shot, the control input of which is connected to one of the outputs of the storage element, the other output of which is connected to one of 1, the mercury leads to a decrease in the length of the installation inputs of the one-shot, D Ј, The pulse duration Ј from the output of the one-shot 3 is fed to the first input of the element And 4, the second input of which receives the pulses from the output of the high-frequency generator 5. During the time of existence of a pulse at the output of the one-shot 3, the pulses from the high-frequency generator 5 are fed through element 4 to the counting input of counter 6, which counts the number of these pulses. If the number of pulses arriving at the counting input of counter 6 exceeds the threshold value, then a signal is output at its output. The threshold value allows us to determine the output of which is connected to one input of the element And, the other input of which is connected to the output of the high-frequency generator, and the output of the element And soy. It is connected with a counter input of the counter, which is connected to the trigger setup input, the inverse output of which is connected to the control input of the key, whose information input is connected to the output of the voltage source, the one-shot synchronization input, the reset input the trigger is connected and is the reset input of the device whose output is the key output. 50 55 element 1, at the output of the key 8 either the signal disappears or not. Invention Formula An image conversion device comprising a photosensitive element, an And element, a trigger, characterized in that, in order to improve accuracy, a cumulative element, a one-shot, a high-frequency generator, a counter, a key and a reference voltage source are additionally introduced, and the outputs of the photosensitive element connected to two installation inputs of the one-shot, the control input of which is connected to one of the outputs of the storage element, the other output of which is connected to one of the output of which is connected to one input of the element I, the other input of which is connected to the output of the high-frequency generator, and the output of the element AND is connected to the counting input of the counter, the output of which is connected to the input of the trigger setup, the inverse output of which is connected to the control input of the key The information input of which is connected to the output of the reference voltage source, the synchronization input of the one-vibrator, the installation input of the counter, and the reset input of the trigger are combined and are the reset input of the device whose output is the output key. -La 9 C5jjoc L eight