RU2096922C1 - Device for input and comparison of tv pictures - Google Patents

Abstract

FIELD: TV equipment, in particular, comparison of pictures such as manuscripts, documents, industrial articles. SUBSTANCE: device has TV camera 1, analog-to-digital converter 3, unit 4 which controls initial address in memory unit, memory unit 6, address unit 7, digital-to-analog converter 9, distributor 10, display unit 11, control unit 12 for read-write mode. Video signal generator 2, frequency divider 5, mixer 8 and analog gate 13 are introduced to accomplish the goal of invention. EFFECT: possibility of comparison of matching and mismatching details on pictures. 7 dwg

Description

 The invention relates to television and can be used in comparative studies of images.

 A device is described in the literature (V.I. Matveenko, Yu.G. Staroverov "Halftone system of technical vision", "Microprocessor means and systems", N 2, 1987, S. 68-69). The device contains a TV sensor, analog-to-digital converter (ADC), random access memory (RAM), address block, digital-to-analog converter (DAC), video monitoring device (VKU).

 The device provides storing of the current and reference images and their alternate display on the VKU screen. The disadvantage of this device is the inability to move the stored image on the VCU screen, as well as the imposition of images for comparison.

 The closest in technical essence to the claimed is a device according to the patent of the Russian Federation N 1797135, class. C 06 K 9/36, 02/23/93.

 The device contains a series-connected TV sensor, ADC, RAM, DAC, VKU. The device also contains an address unit, first and second control units, a distributor. The device provides storage of the reference image in RAM and its electronic movement within the raster.

 The disadvantage of this device is the inability to compare the current and previously entered into the memory of the reference image by combining them and highlighting matching or distinguishable details.

 The objective of the invention is to provide a device for input and comparison of television images, in which when combining two images, matching details and their differences are revealed.

 The combination of images is carried out by mixing (overlapping) the current and recorded in RAM reference images, as well as by moving the reference image relative to the current.

 Matching details and differences are highlighted by changing the polarity and contrast of the current image with smooth adjustment from positive to negative, as well as by introducing a flicker mode of the current image when it is superimposed on the reference image.

 To solve this problem, a device containing a television sensor, the information output of which is connected to the information input of an analog-to-digital converter, the output of which is connected to the information input of a memory block, the output of which is connected to the information input of a digital-to-analog converter, video control unit, initial address control unit memory, the output of which is connected to the information input of the address block, the output of which is connected to the address input of the memory block, the mode control unit write-read of the memory block and to the information input of the distributor, the first and second outputs of which are connected to the first and second installation inputs of the address block, the clock output of the television sensor is connected to the clock inputs of the analog-to-digital converter, distributor, control unit for the write-read mode, and the video control unit; a key, a frequency divider, a mixer and a video driver, the output of which is connected to the information output of the television sensor, and the output through the divider is often s is connected to the data input of the analog switch, a control input of which is connected to the television sinhrovyhodu sensor outputs digital-to-analog converter and the analog switch are connected to first and second inputs of the mixer, the output of which is connected to the data input of the video control unit.

 The set of features of this technical solution is new and meets the criterion of "novelty."

 Analysis of known devices allows us to conclude that the claimed technical solution meets the criterion of "inventive step", because the introduction of new features allows you to more reliably identify two images by combining them and identifying matching details and differences by changing the polarity and contrast of the current image, and also by flickering the current image.

 The block diagram of the device is shown in FIG. 1. The device contains a TV sensor 1, a shaper 2 of the video signal, the ADC 3, a block 4 for controlling the initial memory addresses and a block 12 for controlling the write-read mode, a frequency divider 5, a memory block 6, an address block 7, a mixer 8, a DAC 9, a distributor 10, video monitoring unit 11, analog key 13.

 The device blocks are connected as follows.

 A television sensor 1, the information input of which is connected to the information input of the ADC 3 and the video driver 2. The output of the ADC 3 is connected to the information inputs of the DAC 9. The control unit 4 controls the initial memory address, the output of which is connected to the information input of the address block 7. The output of the address block 7 is connected with the address input of the memory unit 6. The control unit 12 write-read mode, the output of which is connected to the control input of the write-read mode of the memory unit 6 and to the information input of the distributor 10. The first and second the outputs of the distributor 10 are connected to the first and second installation inputs of the address unit 7. The sync output of the television sensor 1 is connected to the sync inputs of the analog-to-digital converter 3, address block 7, digital-to-analog converter 9, distributor 10, control unit for write-read mode 12, video control unit 11, an analog switch 13. The outputs of the digital-to-analog converter 9 and a similar switch 13 are connected to the first and second inputs of the mixer 8, the output of which is connected to the information input of the video control Lok 11.

 The device operates as follows. The video signal from the output of the sensor 1 enters through the ADC 3, where it is converted to digital form, to the memory unit 6, designed to store the frame of the reference image. The address signals for the memory block 6 are generated by the address block 7, and the write-read (WE) mode control signal is generated by the block 12. The operation of the device is synchronized with clock signals (frame, line video pulses, line sampling pulses) coming from the TV sensor clock output.

 Depending on the write-read mode, the distributor 10 (Fig. 2) distributes the clock signals to the reset inputs R or sets the number S of the counters of block 7. As a result, in the recording mode, the line and column counters of block 7 (Fig. 3) refer to the memory cells of the matrix memory block 6 with a zero row and a zero column, respectively. The write-read mode is set by block 12 (Fig. 4).

 When reading from the memory unit 6, the signal of the reference image is converted to the DAC 9 in analog form and through the mixer 8 is supplied to the video control unit 11 for display. In read mode, the starting address of the row and column in row 7 is set in accordance with the data received from block 4 (Fig. 5).

 By changing the starting address of the row and column through block 4, the reference image is read, read from the memory block 6 and displayed on the screen of the video control unit 11.

 The current image signal is also supplied to the shaper 2 (Fig. 6), which provides a change in its contrast and polarity from positive to negative. The video signal from the output of the shaper enters through the divider 5 to the analog switch 13, which sets the following operation modes: disabling the current video signal, turning on the current video signal for overlaying on the reference image, flickering of the current image when superimposed on the reference image.

 The flicker mode of the current image, as well as a change in its contrast and polarity of the image, allows revealing matching details and differences in two combined images.

 To ensure the flicker mode, the divider 5 (Fig. 7) (counter) of the frame frequency generates pulses of a duration corresponding to a frame of a television image with a period of repetition of n-frames. The pulses generated by the divider allow the video signal to pass through the analog key in the current image flicker mode (switches K1, K2 are disabled). When K1 is turned on, the divider is held in the zero state, disabling the current video signal. When K2 is turned on, the divider is held in a single state, allowing a constant passage of the current video signal.

 From the output of the key 5, the video signal is supplied to the mixer 8 for overlay on the reference image. By electronically moving the reference image, it is achieved that it is aligned with the current one, and by changing the contrast and polarity of the current image, as well as using the flicker mode, the differences between the current and reference images are visually revealed.

 Thus, the introduction of new blocks and links allows you to expand the functionality of the device due to the mode of comparing images by combining them and identifying matching details and differences.

Claims (1)

 A device for inputting and comparing television images containing a television sensor, the information output of which is connected to the information input of an analog-to-digital converter, the output of which is connected to the information input of a memory block, the output of which is connected to the information input of a digital-to-analog converter, video control unit, control unit for the initial memory address the output of which is connected to the information input of the address block, the output of which is connected to the address input of the memory block, the control unit recording-reading mode, the output of which is connected to the control input of the recording-reading mode of the memory block and to the information input of the distributor, the first and second outputs of which are connected to the first and second installation inputs of the address block, the clock output of the television sensor is connected to the clock inputs of the analog-to-digital converter, address block, digital-to-analog converter, distributor, control unit for write-read mode and video control unit, characterized in that an analog key is entered, d frequency divider, mixer, and video driver, the output of which is connected to the information output of the television sensor, and the output through the frequency divider is connected to the information input of the analog key, the control input of which is connected to the clock output of the television sensor, the outputs of the digital-to-analog converter and analog key are connected to the first and second inputs mixer, the output of which is connected to the information input of the video control unit.

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