A method for scanning the colored surface of tiles and a device for implementing the method

Abstract

The invention relates to a method for scanning the colored surface (2) of a tile and a device for carrying out the method. The device (1) for scanning the colored surface (2) of a tile (3) comprises a photodetector matrix (4) comprising a plurality of rows of parallel photodetectors (5 ) but does not include any color filter above the photodetector (4), the multiple rows of photodetectors (5) are close to each other and only at least one pixel apart; Images of a surface strip (6) of the color surface (2) to be scanned of the tile (3) are acquired synchronously at intervals. The device also includes: a plurality of lamps (7), each lamp (7) has a different luminous spectrum; the set lamps (7) are used to illuminate the colored surface (2) of the ceramic tile (3) to be scanned The surface belt (6), at least one lamp (7) can be turned on every certain scanning time; the conveying device (8) for statically receiving and transmitting the tiles to be scanned (3), on the one hand The conveying device is used to determine the relative movement between the tiles (3) and the photodetector matrix (4) and the plurality of lamps (7). A predetermined number of images of each surface band (6) of the colored surface (2) to be scanned of the tile (3) may be acquired.

Description

technical field [0001] The invention relates to the technical field of color image acquisition, in particular to a method for scanning the colored surface of ceramic tiles and a device for implementing the method. Background technique [0002] The prior art discloses a device for scanning the colored surface of a piece of ceramic tile while moving, and the device includes: a lamp, which emits light of all colors in the visible light range, so as to irradiate a piece of ceramic tile in motion—the color to be scanned at least one surface strip of the surface; and a trilinear camera for acquiring images of the illuminated surface strip of the tile colored surface in motion. [0003] The trilinear camera includes a photodetector matrix, which is composed of three rows of parallel photodetectors in sequence, and red filters, green filters and blue filters are respectively arranged on the positions of the three rows of parallel photodetectors. optical device. The above-mentioned...

AI Technical Summary

Problems solved by technology

[0007] It is well known that changing these criteria even slightly can lead to artifacts, the number of which can be greater depending on the distance between adjacent rows of photodetectors; in the prior art, by minimizing the individual color filters, The distance between adjacent rows of photodetectors has been reduced to a value of about four to five times the pixel size

However, the distance value of multi-row photodetectors is not satisfactory, so a smaller color filter needs to be designed

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