SD-OCT (Spectral-domain optical coherence tomography) image-based celadon ware glaze layer thickness measuring method

Abstract

The invention discloses an SD-OCT (Spectral-domain optical coherence tomography) image-based celadon ware glaze layer thickness measuring method. According to the method, the thicknesses of sample celadon ware glaze layers are measured, so that a database of the refractive indexes of different types of celadon ware glaze layers is built; the SD-OCT image of a celadon ware glaze layer is acquired;the SD-OCT image of the celadon ware glaze layer is filtered and binarized, the upper boundary of the glaze layer is positioned; edge detection is performed, so that structural elements are designed,the structural elements are adopted to perform closed operation on the image which has been subjected to edge detection, and the lower boundary of the celadon ware glaze layer is extracted; and the difference value of the upper boundary pixel and lower boundary pixel of the glaze layer is multiplied by the physical depth of each pixel, so that the thickness of the celadon ware glaze layer can be calculated. With the method disclosed by the invention adopted, the nondestructive real-time measurement of the thickness of the celadon ware glaze layer is realized; measurement precision reaches a micron level; high precision is realized; and the thicknesses of the glaze layers of various celadon wares can be measured according to the established celadon ware glaze layer refractive index database. The method has strong adaptability, and can improve measurement efficiency.

Description

technical field [0001] The invention belongs to the field of automatic measurement of celadon glaze layer thickness, and relates to a processing method of SD-OCT images, in particular to a method for measuring the thickness of celadon glaze layer of SD-OCT images. Background technique [0002] my country's ceramics have a long history, and celadon is one of the main types of ceramics, which has received extensive attention and research from people at home and abroad. The thickness of the glaze layer and the uniformity of the overall glaze thickness of the porcelain are one of the main factors to judge the quality of a piece of celadon. The traditional method of measuring the thickness of the celadon glaze layer is to destroy the porcelain for physical measurement, which has a certain accuracy, but cannot measure all parts of the porcelain. The thickness of the glaze layer is a method of destructive measurement, so it is of great significance to realize non-destructive measur...

AI Technical Summary

Problems solved by technology

The thickness of the glaze layer and the uniformity of the overall glaze thickness of the porcelain are one of the main factors to judge the quality of a piece of celadon. The traditional method of measuring the thickness of the celadon glaze layer is to destroy the porcelain for physical measurement. It has certain accuracy, but it cannot measure all parts of the porcelain. The thickness of the glaze layer is a method of destructive measurement, so it is of great significance to realize non-destructive measurement

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