Detection method for trace amount of dust based on microscopic image processing

Abstract

The invention, which belongs to the technical field of measurement, particularly relates to a detection method for a trace amount of dust based on microscopic image processing. The method comprises the following steps: step 1, collecting an image of eachdust particle on a certain surface by using a microscopic imaging system; step 2, performing gray processing on the dust particle images; step 3,performing illumination correction ongrayscale images by using a block background extraction method; step 4, carrying out median filtering processing on the images after illumination correction; step5, drawing gray histograms for the grayscale images; step 6, carrying out image edge detection on the images by adopting a Prewitt operator; step 7, performing binary image processing such as expansion and corrosion on the images; step 8, performing feature extraction on the images, and carrying out statistics on the number of pixel points occupied by each dust particle so as to obtain a pixel area of each dust particle; and step 9, deducing the volume of the dust particle according to the pixel area of the dust particle and acquiring the mass of each dust particle based on the volume and density to obtain the total mass of the dust particles.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a micro dust detection method based on microscopic image processing. Background technique [0002] The traditional technology obtains the weighed mass by weighing. The principle of the weighing device is to use the gravity of the object to be weighed, so that it acts on the weighing device, and then the quality can be obtained. Although gravity is also a force, the existing micro force measuring devices cannot be applied to micro mass measurement. In fine research, the mass to be measured is very small, possibly on the order of milligrams or even micrograms, and the weighing device is required to have the ability to accurately measure tiny masses. At present, the methods that can weigh tiny masses mainly include: analytical balance, torsion balance, resonance and laser interference. Both the quartz crystal microbalance and the micromass sensor based on the diffe...

AI Technical Summary

Problems solved by technology

A small amount of dust settles on a certain interface. Sweeping by painting will cause the material on the brush to absorb, and it is difficult to ensure complete collection by blowing, resulting in the loss of dust particles. Most of the existing measurement methods are based on gravity, and it is difficult to obtain accurate results.

Images