SU1552206A1 - Device for reading colour images - Google Patents

Abstract

The invention relates to automation and computer technology and is intended for use in scanning input devices in a computer graphic information (the reader). The aim of the invention is to improve the accuracy of the device due to the optimal choice, depending on the readable colors, of the color channels in which the video signals are processed. The device comprises a light spot projection unit 1, a scanning unit 2, a lens 3, a diaphragm 4, a dispersing prism 5, a photoelectric converter 6, analog-digital converters 7, threshold blocks 10, a registration unit, a switch 8, signal level registers 9, register 13 color code, block 11 analysis of differential signals and block 14 registration. The proposed set of blocks allows operation in optimally selected spectral regions, in contrast to fixed spectral regions in known devices. 2 Il.

Description

one

(21) 4004216 / 24-24

(22) 01/03/86

(46) 03/23/90. Bnsh. № 11

(71) Institute of Technical Cybernetics of the Academy of Sciences of the BSSR

(72) A.F. Gorevoy, B.V. Tarasov and B.C. Gritsenko

(53) 681.327.12 (088.8)

(56) Uzilevsky V.A. Transfer processing and playback of color images. - M .: Radio and communication, 1981.

USSR Author's Certificate No. 964671, cl. G 06 K 11/00, .1981.

(54) DEVICE FOR READING OF COLOR IMAGES

(57) The invention relates to automation and computer technology and is intended for use in scanning input devices in computers of graphical information (read readers),

The aim of the invention is to improve the accuracy of the device due to the optimal choice depending on the readable colors of the color channels in which the video signals are processed. The device comprises a light spot projection unit 1, a scanning unit 2, a lens 3, a diaphragm 4, a dispersing prism 5, a photoelectric converter 6, analog-digital converters 7, threshold blocks 10, a registration unit, a switch 8, signal level registers 9, register 13 color code, block 11 analysis of differential signals and block 14 registration. The proposed set of blocks allows operation in optimally selected spectral regions, in contrast to fixed spectral regions in known devices. 2 Il.

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The invention relates to automation, computer and computer technology and can be used to read multicolor graphic information.

The aim of the invention is to improve the accuracy of the device due to the optimal choice depending on the spectral characteristics of the colors of the color channels in which the video signals are processed.

FIG. 1 is a block diagram of a device for reading color images; in fig. 2 - functional block difference analysis block diagram.

A device for reading color images (Fig. 1) block 1, a projection of a light spot, a scan unit 2, a collimating lens 3, a diaphragm 4, a dispersing prism b, a photoelectric converter 6, analog-to-digital converters 7, a switch 8, level code registers 9 signals, threshold blocks 10, differential difference analysis block 11, comparison block 12, color code register 13, and registration block 14. The diaphragm 4 and prism 5 form a beam splitter.

The differential signal analysis unit 11 contains (FIG. 2) the registers 15, the adder 16, the first 17, the second 18 and the third 19 of the comparison circuit.

The device works as follows.

Before starting work, the operator makes preliminary input of color graphic information into the device. The areas of the original of different colors are sequentially installed in front of the lens 3. The light flux reflected from the part 1 illuminated by the unit passes through the lens 3 and the diaphragm 4 to the dispersing prism 5, which decomposes the incoming light flux into the spectrum projected onto the photosensitive surface of the matrix photoelectric converter Signals from the output of the latter, proportional to the 50 spectral composition of the luminous flux reflected from a section of graphic material, are fed to the inputs a scarlet-digital converter 7 where formmiruyugs unitary numeric codes corresponding to the color image reading element. These codes are received in the registers 15 of the block 11 analysis of differential signals.

15522064

The recorded color information of the readable graphic material from the registers 15 is fed to the adder 16, where the differences between the signals corresponding to different colors are calculated. The difference signals are fed to comparison circuit 19, where their maxima are calculated. The values of these maxima are recorded in the registers of 9 signal levels. Comparing the calculated maxima with the input information recorded in the registers 15, the codes of the signals controlling the switch 8 are determined. Using these signals, the switch connects analog-to-digital converters whose signals correspond to the calculated maximums of color signal differences to the corresponding inputs of the threshold blocks 10. According to with the calculated values of the maxima of the difference signals and the selected signal codes for controlling the switch 8 in the comparison circuit, the color codes of the region readable are determined The images are recorded in the color code storage register 13.

After finishing the preliminary

30 input of graphic information signals corresponding to the color of the read image from the output of the photoelectric converter 6 are fed to the inputs of analog-digital converters 7, which convert them into a unitary digital code. These codes, through switch 8, arrive at threshold blocks 10, where they are compared with the recorded maxima of color difference.

40 signals, and as a result of the comparison, a unitary intermediate color code is formed, which is compared in block 12 with the color code recorded in register 13 of the color code, and in block 12

45 comparison, the final color code of the portion of the read image is generated, which is registered by the registration unit 14.

Claims (1)

Invention Formula A device for reading color images containing an optically coupled spotlight projection unit, a scanning unit, a collimating lens, a beam splitter and a photoelectric converter, as well as analog-to-digital converters whose inputs are connected to the output After finishing the preliminary the input of graphic information signals corresponding to the color of the read image from the output of the photoelectric converter 6 are fed to the inputs of analog-digital converters 7, which convert them into a unitary digital code. These codes, through switch 8, arrive at threshold blocks 10, where they are compared with the recorded maxima of color difference. signals, and as a result of the comparison, a unitary intermediate color code is formed, which is compared in block 12 with the color code recorded in register 13 of the color code, and in block 12 comparison, the final color code of the image to be read is generated, which is registered by the registration unit 14. Invention Formula A device for reading color images containing an optically coupled light spot projection unit, a scanning unit, a collimating lens, a beam splitter and a photoelectric converter, as well as analog-to-digital converters whose inputs are connected to the output 51 a photoelectric converter, threshold blocks and a registration block, characterized in that, in order to improve the accuracy of the device, it contains a block for analyzing difference signals, signal level code registers, a comparison block, a color code register and a switch, whose information inputs are connected to the analog-to-digital outputs converters and information inputs of the differential signal analysis unit, the first output of which is connected to the control input of the switch, the second output of O. Yurkovetska Compiled by T.Nichiporovich Tehred L. Serdyukova Proofreader M. Maksimishinets Order 332 Circulation 556 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 522066 the course - with the information inputs of the signal level code registers, and the third output - with the information input of the color code register, the switch outputs are connected to the first information inputs of the threshold blocks, the second information inputs of which are connected to the outputs of the signal level U registers, and the outputs with the first information the inputs of the comparison unit, the second information inputs of which are connected to the outputs of the color code register, and the output - to the information input of the registration unit. Subscription