SU919155A2 - Television three-dimensional differentiating filter - Google Patents

Description

(54) TV SPATIAL DIFFERENTIATING FILTER

one

The invention relates to radio engineering and can be used in television and television imaging technology.

.0 the purpose of suppressing or emphasizing upper spatial frequencies: the contours of objects, contrasting brightness, point or linear image elements, finely. structural noise, etc.

Known television spatial

differentiating filter containing a summing amplifier and a photoresistive matrix, to which column tires are connected on one side to a power source through the main column bus switch, and on the other side - the first additional column bus switch, with the photoresistive matrix bars on the one hand connected in series connected the main line bus switch and the first additional line bus switch, and on the other hand the second additional line bus switch (1.

However, in the known device there are

1 analog video signal blocks that

reduces the accuracy of image analysis due to distorted signals during their movement in the memory elements, especially when using solid photogenerators with high resolution (moreover. The presence of memory circuits reduces the reliability and increases the required amount of equipment.

The purpose of the invention is to simplify the device for eliminating analog memory blocks. : To achieve a goal in a television 10. An on-line differential differentiation filter containing a summing amplifier and a photoresistive matrix, to the columns of which, on one side, a power supply is connected via the main bus switch of the columns, and on the other hand, the first additional switch of the buses of the columns, while to the buses of the photoresistive matrix on the one hand serially connected main switch needles lines

Claims (2)

20 and the first additional row bus switch, and on the other hand, the second bus switch) 1st row bus switch, are entered in series by connecting additional power supply errors and a second extra switch (Mutator ishnik columns, the second additional switch of column bus bars is connected in series with the switch WM bus columns, and the outputs of the main switch bus lines and the first additional switch bus lines connected to the corresponding inputs of the summing amplifier. In Fig. 1 shows a structural electric Figure 2 shows a multiple element aperture, where a is the polyaperture formation method, b is the resulting transparency coefficients in the 3x3 element example of analysis. The device contains a summation {, photoresistive matrix 2, power source3, main switch 4 bus columns, additional switches 5 and 6 column buses, additional power supply 7, main switch 8 bus lines, additional switches 9 and 10 bus lines. The device works as follows. During the image analysis process, the main switch of 4 column buses switches sequentially column by column to the power supply source 3, and the main switch of 8 row buses switches sequentially row by row and connects the switched row to one of the inputs of summing amplifier 1. Main switches 4 and 8 columns and the lines are connected at each time point of the selected tires, all other tires. At this time, they are locked onto the case. At the same time, additional switches 5 and 6 of the column buses connect adjacent 4 busbars of the columns adjacent to the switchable at the moment, the main switch 4 to the additional power source 7. Additional switches 9 and 10 bus lines Also connect adjacent relatively basic switch In the bus lines to another input of summing amplifier 1 with weights, the signs and magnitudes of which are determined by the processing algorithm. At the output of summing amplifier 1, a signal is generated that is the result of spatial filtering of an image projected onto a photoresistive matrix. 2. The proposed structure of the device allows for spatial filtering of images without real-time information storage elements and, due to the absence of memory, does not have prototype drawbacks. For the case of spotting objects on a complex background with a rammere multi-element aperture of 3x3 photo1) elements of a resistive matrix 2, the device can have the following structure. The main switches 4-8 switch on one bus of columns and rows, and the additional switches 9, 10 and 5, 6 - on two buses of rows and columns (on a single bus on either side with respect to the switch, switched by the main switches). The main switch of 4 column buses connects the switches to a positive source of power 3 + E, and an additional source of 1 size 7 minus E / 2 connects to adjacent columns buses through an additional switch of 6 column buses. The main switch of 8 bus lines connects the signal from the central row of the multi-element aperture to the second input of summing amplifier 1 with a plus sign and a single weighting factor, and the additional switch of 10 bus lines connects the signal from adjacent lines to the first input of the summing amplifier I with a minus sign and weighting factor 0 ,five. At the output of summing amplifier 1, a signal is received from the multi-element aperture. the transparency coefficients shown in FIG. 26. If such a multi-element aperture analyzes a single-color (equal to the brightness) image), then the output signal is equal to zero, since the total signal from the peripheral elements is equal to -1 (let it be E-1B), and from the central element of the aperture +1 and as a result of an algebraic sum zero. If, however, an image with a slow and intense background and bright dots measuring one element of photoresistive matrix 1 is analyzed, the device highlights these bright points and suppresses low-frequency changes in the background, since such a multi-element aperture is a differentiating spatial filter. The given example makes it possible to evaluate the effectiveness of the application of the proposed device for the spatial filtering of images, expressed, in particular, in the complete elimination of memory devices and the reduction in the number of line bus switches. In addition to reducing the amount of equipment, an increase in the accuracy and reliability of the analysis is also expected due to the reduction in errors associated with the use of memory blocks. The invention is a television spatial differentiation filter comprising a summing amplifier and a photoresistive matrix, to which column tires are connected on one side to a power supply through the main column bus switch, and on the other hand to the first additional column bus switch, on the one hand Connected after 59191 the main row switch and the first additional row switch, and on the other hand, the second additional row bus switch, which are connected in series with the simplification of the device by eliminating the analog memory blocks, are connected in series power supply and the second additional bus column switch, while the second additional 10 56 the column bus switch is sequentially connected to the main CTon bus switch (Jnov, and the outputs of the main row bus switch and the first additional row bus switch are connected to the corresponding inputs of the summing amplifier. Sources of information taken into account during the examination 1. USSR author certificate N 773959, cl H 04 N 5/14, 1977 (prototsho. J "" 51 II V -M  J