A skin light transparency degree analysis method and device based on image gray

Abstract

The invention discloses a skin light transparency degree analysis method and device based on image gray. The method comprises the following steps that 1, acquiring a color image of a light transparentskin sample through an image acquisition device; 2, selecting an interested rectangular region of the skin sample in the color image, and converting the RGB component intensity of the rectangular region image into a gray intensity signal; Step 3, selecting a plurality of points of interest from the blood vessel of the selected rectangular area, and calculating the gray value, the gray mean valueand the initial gray mean value of the points of interest; 4, carrying out normalization with the initial gray average value as the maximum value, calculating the gray value of the point of interest,and calculating the gray value and the gray average value reduction percentage P obtained by comparing the gray average value with the initial gray average value; And step 5, drawing a curve graph byusing the gray values, the gray average values and the gray average value reduction percentage P at different times according to the time coordinates. The change trend of the skin light transparency degree is effectively reflected, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of image analysis, in particular to a method and device for analyzing the degree of skin light transparency based on image grayscale. Background technique [0002] The skin is composed of the epidermis, dermis and subcutaneous tissue, and contains sweat glands, capillaries, nerves and other appendages. These skin components have complex morphological characteristics, and have different refractive indices for each wavelength of visible light, which makes the skin weaken the extracutaneous light. The intensity and depth of the skin make the subcutaneous blood vessels appear blurred. [0003] So far, open skin windows (referred to as skin windows) are often used in blood vessel-targeted medical research for blood vessel observation, tumor microenvironment observation and treatment, and images of subcutaneous blood vessels are obtained through skin windows to study blood vessels. various states. The open skin ...

AI Technical Summary

Problems solved by technology

[0004] During the use of skin light transparency technology, the skin gradually turns from a turbid state to a transparent state, and the subcutaneous blood vessels gradually appear in a clear state. During this process, changes in the skin light transparency state are generally detected by professional laser light sources, cameras and spectrometers. Analyzing images of skin or the spectrum of reflected and transmitted light on the skin is expensive and difficult to implement

[0005] In order to measure the effect of light transparency, the existing technical means generally use expensive lasers to irradiate the skin of the area to be observed. If a spectrometer is used superimposed, the cost will be higher

[0006] In the measurement process, the method of irradiating the skin with the laser and then using the camera to obtain the skin image is generally carried out in an optical darkroom. As a professional equipment, the laser is generally not easy to move, which leads to expensive and complicated measurement methods. The study is the degree of distinction between the subcutaneous blood vessels and the surrounding background image in the light transparency effect

[0007] The method of using a laser to irradiate and then use a spectrometer to monitor the intensity of reflected light and transmitted light generally also requires the use of a professional laser and superimposed spectrometer, which is also carried out in an optical darkroom. The measurement method is expensive and the operation is relatively complicated.

This method also has an important disadvantage. The spectrometer can only measure the light collected into the spectrometer, which reflects the change trend of the spectrum. It cannot accurately describe the change of light transparency at each point on the skin.

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