SU1644172A1 - Device for generation tv picture amplitude bar charts - Google Patents

Abstract

The invention relates to automation and computing and is intended for statistical image processing. The purpose of the invention is to enhance the functionality by providing arbitrary image fragments. The device accumulates in the memory block 11 the number of video signal samples with amplitudes defining the addresses of block 11 by adding one unit on the unit 12 unit to the cell contents with the corresponding address. Data multiplexers 7–9, addresses and write-readings respectively provide control initial setup modes — device calculations. The inserted block of separation of image fragments provides the formation of a signal that permits the passage of recording pulses from synchronization block 6 through element 5 to the write-read control input of block 11. The specified resolution signal is generated based on the fragments specified in block 3 of selection of the image with time-related signals block 4 counters of the number of elements and lines. 1 il. Yo

Description

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The invention relates to the field of automation and computer technology and may find application in solving sample recognition problems and in automatic visual control systems, for example, industrial robots,

The purpose of the invention is to expand the functionality of the device by providing processing of arbitrary image fragments. The drawing shows the proposed device.

A device for calculating amplitude histograms of television images contains a generator of 1 clock pulses, an analog-digital converter 2, a block 3 for extracting image fragments, a block 4 of counters of the number of elements and lines, an element 5, a synchronization block b, data multiplexers 7, addresses 8 and read / write 9, I / O unit 10, memory unit 11, adder 12 units. In addition, informational input of 13 image elements of the device and highway 14 of communication with external devices are indicated.

The block 4 of the counters of the number of elements and lines generates personnel, horizontal sync pulses, as well as other cathode-ray tube control signals (not shown) at their outputs, can be implemented according to any typical scheme of similar devices. The synchronization unit 6 in its purpose, structure and possible implementation is completely identical with the synchronization unit of the known device. Its main purpose is to generate, after the input of the trigger input, a signal from the output of the input-output unit 10 of a series of control signals during the forward run of the first frame. The block 3 for extracting image fragments can be in principle any. Its internal structure is determined by the requirements placed on the possibilities of operative formation and selection by the operator of the necessary image fragments. For example, if an image fragment is selected as rectangles with any aspect ratio and with an arbitrary location on the screen, then a known device operating in the Mask mode can be used as the block 3 for selecting image fragments. The known device, operating in this mode, forms at its output a signal extracting all points belonging to the selected image fragment. The input-output unit 10 is intended for exchanging information with external devices via the bus 14. The implementation of the input-output unit 10 depends on the communication bus used with the external devices and does not have any special features.

The device works as follows

Before the next processing cycle, the memory block 11 is zeroed out. For this, multiplexers 7-9, under the control of the signal from the output of the job assignment of the I / O unit 10, are connected to the information, address inputs and the write / read control input of the memory block 11, respectively, data outputs, addresses and records of the I / O unit 10. Zeroes are set at the output of the data. Overwriting of all addresses is a complete zeroing of the memory. After presetting the contents of memory block 11, the device is ready for the next processing cycle.

In the processing mode of the video information received at the input 13, multiplexers 7-9 connect the outputs of the adder 12 units, the output of the analog-to-digital converter 2 and the output of the element 5 to the corresponding inputs of the memory block 11. Under the influence of the clock signals from the output of the generator 1, the clock pulses are analog-digital Converter 2 generates codes arriving at the address inputs of memory block 11. According to these codes, in memory block 11, cells are selected whose addresses correspond to the amplitude of the input video signal. After the start of the computation of the signal input / output unit 10 arrives at the corresponding input of the synchronization unit, the latter begins its work cycle, which is determined by the horizontal, frame and clock pulses. The inputs of the synchronization unit 6 are lowercase and frame sync pulses from the output of the block 4 counters of the number of elements and lines, and the clock pulses from the output of generator 1. During the forward strokes of the horizontal sweep and during the forward stroke of the frame at the output of the synchronizing unit 6 The pulses that, having passed through the element 5 and the multiplexer 9 read-write, can overwrite the information in the block 11 of the memory. The second input element And 5 receives signals from the output of block 3 selection of the image. If the current point belongs to the analyzed fragment of the image, then at the time point at the output of the fragment selection block 3, a signal is generated that permits the passage of pulses from the synchronization block b through element 5. And vice versa, if this point does not belong to the analyzed fragment, then the output of the block 3, a signal is generated that prohibits the rewriting of information in the memory block 11. During the rewriting, the content of the memory cell to which it is currently being incriminated is incremented (by one). Odita treatment. The address of such a cell is determined by the code at the output of the analog-to-digital converter. Consequently, during the time of the first stroke of the first after the start of the triggering pulse of the frame, the number of accesses to each of the cells was recorded in memory block 11, which indicates the frequency of occurrence during this time or another. video signal level a histogram of the amplitudes of the selected fragment of the television image is generated.

By selecting block 3 of the selection of image fragments, the dimensions and the masks on the screen can be used to analyze any fragment, including the entire frame. In the latter case, the And 5 element is open for the entire duration of the forward frame and the device has analyzed all elements of the original image.

Thus, the proposed device allows analyzing image fragments, the dimensions and position of which on the screen are arbitrary and can be easily changed by a separator.

Claims (1)

An image formula for calculating amplitude histograms of television images, comprising a clock generator, the output of which is connected to the clock inputs of the analog-to-digital converter, a synchronization unit and a block of counters of the number of elements and lines, the first output of which is The synchronization unit has a start, the start input of which is the start of the computation of the device, the ohot of the initial installation of which is connected to the first information input of the multiplexer x, the output of which is connected to the input of the memory, the output of which is connected to the information input of the unit adder, the output of which is connected to the second information input of the multiplexer., the control inputs of the data multiplexer, the address and the write-read connection to the input of the task, the initial mode is set to calculate the mouth The data entry, record data entry input connection is coherently connected to the first information input of the read / write multiplexer, the output of which is connected to the memory control input, which is addressed to the output multiplexer output address, the first and second data inputs which is connected to the input of the device address and to the output of the analog-digital converter, respectively, whose information input is the information input of the image elements of the device, which is In order to expand the functionality by providing processing of arbitrary image fragments, an AND element and a fragment-image selection block are entered into it, the input of which is connected to the second output of the counters block of the number of elements and lines, and the output is connected to the first input of the AND element, the second input which is connected to the output of the synchronization unit, and zyhod-with a second, open information input mutaplexor write-read.