SU807347A1 - Device for identification of coding marks - Google Patents

Description

(54) DEVICE FOR RECOGNITION CODECTS

METHOD

one

The invention relates to automation and computing and can be used in the printing industry and other areas of those (shki, in particular in devices for automatic input of images, graphs, geographical maps in computers.

A device that detects the service coding labels on the analyzed image 1.

However, this device is not pos. It recognizes the color of service marks, which limits its ability to implement multi-mode control of the input device.

Devices are known that allow the media to determine the color of the scanned object 2, 3 and 4.

However, color devices cannot be used to determine the color of the service coding labels obtained using three-color printing synthesis. Marks of labels, the color of which is formed by subtractive displacement of two or three dyes, have a color different from the color of the label due to the inability to ensure accurate alignment of printing plates in the printing process. For example, an elenogue mark of color obtained by applying yellow and blue inks has one edge of a yellow color and the other a blue one. This circumstance is the cause of unreliable recognition of the color of the tags by known devices.

The closest in technical essence to the present invention is a device for analyzing the color of an object,

o containing a tricolor video signal sensor with three color filters, indication and illumination units of the object under study, a chronizer connected to the sensor and

5 by the display and analysis unit connected between the three-color video signal sensor and the display unit, the analysis unit comprising amplifiers, adders, threshold circuits,

0 logical NOT-AND and two-coordinate matrix on circuits AND, amplifiers are combined into three groups according to the number of color channels, the inputs of each group are connected to the corresponding input

5 analysis units, the outputs of the amplifiers of each group are connected to the inputs of the adder of the same channel, the output of the adder of each channel is connected to the corresponding threshold circuit via the summation-subtraction circuit.

0

connected through the logical scheme NOT-AND with the corresponding bus of the two-coordinate matrix fs i.

However, this device also does not reliably recognize the color of the coding labels obtained by three-color synthesis.

The purpose of the invention is to improve the reliability of recognition of color and coding labels.

The goal is achieved by introducing a unit for generating output pulses, a group of elements And, and a group of output pulse generators, the inputs of each element And group are connected to the outputs of the corresponding photosensors of primary colors , And his; output - with the first inputs of the formation units of the output pulses of the first group, the second inputs of which are connected to the inputs of the corresponding element I of the group, and with the second inputs of the corresponding formation units of the output pulses of the second group, inputs of the And element connected to the outputs of the photosensors of the primary colors, and its output with the first inputs of the formation units of the output pulses of the second group and, with the second input, the generation unit of the output pulses. Moreover, the output pulse shaping unit contains an inverter, pulse shapers, a trigger, an And element and a delay element, an inverter input and a first pulse shaper input are connected to the second input of the output pulse shaping unit, and the inverter output is connected via a second shaper to one input of the And element, the other input which is connected to a single trigger output, the output element And is the output of the block forming the output pulses and through the delay element connect with the zero input of the trigger, which is forming a first input block of p-Uhodnyh pulses soedynen unit whose input is output from the first pulse shaper.

FIG. 1 is a functional block diagram of the device for recognizing coding labels} in FIG. 2 is a functional block diagram of the formation — you’re single pulses) in FIG. 3 time diagrams of the operation of the device for the case of a green coding label obtained by subtractive synthesis using yellow and blue inks.

 A device for recognizing encoding tags contains photo sensors. 1-3 primary colors (yellow, magenta, and blue), threshold 4--6 elements, group of elements And 7-9, element And 10, the first group of blocks

11-13, the formation of output pulses, the second group of blocks 14-16 of formation of output pulses, and the block 17 of formation of output pulses. The output pulse shaping unit 17 comprises an inverter 18, pulse formers 19 and 20, a trigger 21, an element 22 and an element 23 for a holder. The device contains the first 24, second 25 block forming the output pulses and its output 26. The device operates as follows.

When crossing the green mark, the analyzing equipment at the output of the photosensor 1 appears from the section containing the yellow dye (Fig. 3b), and at the output of the photosensor 3 - from the section containing the blue dye (Fig. 3b). The signals at the outputs of the photosensors are subjected to threshold processing at a threshold equal to Uj ,, and at the output of threshold devices. 4 and 6 have the form shown in fig.Zg and d, respectively. The signals from the outputs of the threshold devices are fed to the inputs of the elements I. In this example, the coincidence of the signals from the outputs of the threshold devices takes place only at the inputs of the element 8. At the output of the element 8, a signal is obtained that is logically equal to the product of the input signals (Fig. 3e). All three signals obtained by scanning the green label are sent to the second inputs of the corresponding output pulse shaping units, which generate an output pulse on the falling edge of the signal present at the second input, but only if the block has not reset during the time the input signal exists . In this case, the output impulse is received only at the output of block 15, since blocks 11 and 13 are reset by the signal from the output of element AND 8, which goes to the first inputs of blocks 11 and 13. Thus, the green coding label is correctly recognized. Similarly, the device works in the case of recognizing monochromatic: yellow, magenta, cyan, two-colorful: red, green, blue and three-color black marks.

Claims (5)

Let us consider in more detail the work of the output pulse shaping unit (Fig. 2). When a signal arrives at the second input 25 along its leading edge of the formers 20, a short pulse is generated, which sets the trigger 21 into one state. The signal from the single output of flip-flop 21 opens element 22 and permits the pulse generated by shaper 19 on the trailing edge (due to the presence of an inverter 18) signal on the second input 25. If, during the time that the signal at input 25 exists, flip-flop 21 is reset by applying a signal to one of the reset inputs 24, the element And 22 turns out to be closed, and the pulse forming on the trailing edge of the input signal does not pass through the element 22 and the output 26. If the reset signal is not received, then the pulse through the element 22 passes the output 26, as well as through ale nt 23 delays the trigger 21 returns to its initial zero state. For the case of the analysis of the green label discussed above (Fig. 3g, 3), the pulses generated by the shaper 20 in each of blocks 11, 13 and 15 are shown. Thus, the triggers in all three blocks of forming the output pulses are set to one However, the pulse from the output of the element is And 8 (Fig. Ze resets the triggers of the blocks 11 and 13 of the formation of output pulses. The proposed device has a higher reliability of recognizing the color of the coding tags, which are half-read using three-color printing synthesis, because Ultimate recognition does not depend on the inaccuracy of printing plate alignment in the printing process.A invention 1. A device for recognizing coding labels containing photo sensors of primary colors connected to respective threshold elements and an AND element, characterized in that, in order to improve the reliability of color recognition of coding labels It contains a block for forming output pulses, a group of elements And and a group of blocks for forming output pulses, the inputs of each element of the group And are connected to the outputs of the corresponding primary photosensors of the primary colors, and its output — with the first inputs of the output pulse shaping units of the first group, the second inputs of which are connected to the inputs of the corresponding I group element, and with the second INPUTS1 of the corresponding output pulse formation blocks of the second group, the inputs of the And element colors, and its output — with the first inputs of the output pulse formation units of the second group and with the second input of the output pulse shaping unit. 2. The device according to claim 1, characterized in that the block formation of the output pulses includes an inverter, pulse shapers, a trigger, an element And a charge element, an input of the inverter and the input of the first pulse shaper connected to the second input of the output pulse shaping unit, and the output of the inverter through the second driver, it is connected to one input of the element I, the other input of which is connected to the unit output of the trigger, the output of the element I is the output of the output pulse shaping unit and through the delay element is connected to zero The trigger input, which is the first input of the output pulse shaping unit, has a single input connected to the output of the first pulse generator. Sources of information taken into account during the examination 1. USSR author's certificate No. 389531, cl. G 06 K 11/00, 1967. 2. USSR author's certificate No. 263303, cl. G 06 K 11/00, 1968. 3.Patent of the USSR No. 307595, cl. G 06 K 9/12, 1967. 4. USSR author's certificate №561306, cl. H 04 N 1/16, 1975. 5. USSR author's certificate No. 330471, cl. G 06 K 7/12, 1967 (prototype). S Oh (On ICG . t