Novel upper light source inclined illumination type image collecting method for tile size detection

Abstract

The invention discloses a novel upper light source inclined illumination type image collecting method for tile size detection, belongs to the technical field of image collection, and relates to a tile corner image collecting method based on upper light source inclined illumination. According to the method, based on the height difference between a tile surface and a transmission belt, when inclined illumination is carried out by a light source from the tile surface to the belt surface, a shadow dark space is formed on the belt surface, and then tile corners are highlighted by means of the shadow dark space to form a sharp outline; due to the fact that dark space is formed by the shadow of a tile, the dark area exists even when water exists on the belt or the belt is abraded; furthermore, tile corner imaging quality is not affected by the fact whether the tile is chamfered or not. When the method is applied to a tile size detection system, accuracy and stability of parameter detection can be improved. The method is especially suitable for tile size detection occasions in which image collection can not be achieved with a lower light source method or water interference and chamfering interference are hard to overcome when image collection is carried out with a traditional upper light source method.

Description

Technical field [0001] The invention relates to a new method for image acquisition in a tile size detection system, in particular to a new method for image acquisition of tile corners based on an upward light source oblique illumination. Background technique [0002] At present, the automatic tile size inspection equipment used by ceramic tile manufacturers uses machine vision technology to collect, segment and identify the four corners of the sample tile and the tile to be tested. According to the position of the four corners of the sample tile and the corresponding corner point of the tile to be tested Position deviation, indirectly calculate the size of the tile to be tested. The specific detection process of the tile size detection equipment is as follows: fix four CCD cameras directly above the four corners of the tiles, and transport the tiles through the CCD shooting area by a conveyor belt. When the four corners of the tiles move to the center of the respective camera sho...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to provide a new method of obliquely illuminated image acquisition with an upper light source for ceramic tile size detection, so as to solve the problems of water droplets on the belt and chamfered corners of tiles and The problem of belt wear affects the image quality of tile corners and greatly reduces the accuracy of image segmentation

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