A Method for Acquiring Focused Digital Image of Fiber Cross-section Section under Microscope

Abstract

A method for acquiring digital focused images of fiber cross section slices under a microscope includes steps of (1), acquiring a preliminary panoramic image, recording an XY-direction initial position of a horizontal plane of a three-way movable objective table related in a system, moving a fiber slice along a Z direction to a prior focusing position, setting an XY-direction movement track and a movement step length, then starting the objective table, splicing images which are taken at fixed points in a movement procedure into a large complete image of the fiber slice after the objective table stops moving, and moving the objective table to the initial position; (2), computing XY-direction projection for the preliminary panoramic image; and (3), converting a central position into an XY-direction movement distance of the objective table, moving the objective table, aligning a lens with the central position of the slice and completing automatic focusing by a two-stage search strategy on the basis of the prior focusing position. A position corresponding to the minimum projection value is the central position of the fiber cross section slice. The method has the advantages that labor can be saved, and misjudgment in follow-up image processing is reduced.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a fiber cross-sectional image acquisition method, in particular to a fiber cross-sectional slice panorama digital image acquisition method under an autofocus microscope. Background technique [0002] At present, it is difficult to detect the fiber parameters of hemp, cotton, wool, chemical fiber and other fibers by chemical or mechanical methods after they are blended. Now a relatively common detection method is the microprojection method, using an ordinary biological microscope (magnification of 200 times~ 250 times) or a microprojector to observe the fiber. According to the method stipulated in my country's textile industry standards, prepare glass slides and place them on the stage of ordinary biological microscopes or micro-projectors, observe all kinds of fibers entering the field of view through the eyepiece, and identify their types according to the morphological an...

AI Technical Summary

Problems solved by technology

In such a process, there are some areas that can be improved. First, the movement in the XY direction of the horizontal plane is controlled by humans with large errors, and some fibers may be processed repeatedly; second, for cross-sections, humans need to manually locate the fiber position and focus the microscope ; Third, limited by the microscope CCD camera, the image collected by the computer is only a small area, and the boundary fiber section cannot be fully seen

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