Device and method for measuring glossiness of in-vitro hair

A glossy and in vitro technology, applied in the field of cosmetic functional testing, can solve the problems of low agreement between the measurement results and the sensory evaluation results, and the inability to accurately judge the influence of hair gloss, and achieve the effect of simple operation

Inactive Publication Date: 2013-04-24
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention aims at the above-mentioned current existing problems, in order to overcome the inability of the existing gloss evaluation method to accurately judge the influence of different hair products on the hair gloss, so that the measurement results and the sensory evaluation results have a low degree of coincidence.

Method used

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  • Device and method for measuring glossiness of in-vitro hair
  • Device and method for measuring glossiness of in-vitro hair
  • Device and method for measuring glossiness of in-vitro hair

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1 measures the device of isolated hair glossiness

[0018] A device for measuring the glossiness of isolated hair, including a digital camera 1, a light-proof black box 2, a light source system 3, and a hair fixing cylinder 4 (such as figure 1 shown). The light-proof black box 2 is an opaque box body, 60cm long, wide 30cm, and high 40cm; a digital camera 1 is installed at one end of the light-proof black box 2, and the digital camera 1 is a digital camera with 18 million pixels; it is installed in the middle of the light-proof black box 2 Light source system 3. Light source system 3 includes a circuit conversion device for converting 220v AC to 12V DC regulated current and two 12v, 50w low-voltage quartz white light lamps. The two quartz white light lamps are placed on both sides of the light-proof black box 2 respectively. The white light lamp is 30cm away from the center of the digital camera lens; the hair fixing cylinder 4 is installed at the other end o...

Embodiment 2

[0019] Embodiment 2 measures the method for in vitro hair gloss

[0020] Wrap the hair bundle to be tested on the hair fixing cylinder 4 in the light-proof black box 2, adjust the aperture F value of the digital camera 1 to 5.6, the shutter speed is 1 / 500s, and the sensitivity ISO value is 200, and the hair image is obtained by shooting. Such as figure 2 shown.

[0021] The captured hair image is processed by MATLAB software, and the RGB system is converted into the LAB chromaticity space system. The hair bundle image is intercepted at the position of pixels, such as image 3 shown.

[0022] Take points for each pixel in the vertical direction of the intercepted collected image, and perform multiple measurements on each vertical height, and take the average value to obtain the average brightness value L at each vertical height in the intercepted image; The vertical height is the abscissa, and the luminance curve is output with the average luminance value L at the vertical...

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Abstract

The invention relates to a device and a method for measuring glossiness of in-vitro hair, belonging to the field of cosmetic functional tests. The method comprises the following steps: by matrix laboratory (MATLAB) image processing software, data collection is performed on a shot hair image, a brightness analysis is performed, a brightness curve is drawn, the brightness peak P of the hair and the curve area A are determined and are combined to show the glossiness of the hair. The device and the method have the advantages of simplicity and rapidness in operation and capability of objectively measuring the glossiness of human hair bands for the purpose of research. The device and the method can be applied to the effectiveness evaluation of different hair products to hair glossiness.

Description

technical field [0001] The invention relates to a device for measuring the glossiness of hair and a method for measuring the glossiness of human isolated hair by using the device, which belongs to the field of cosmetic function testing. Background technique [0002] At present, the measurement of the surface gloss of an object mainly uses a gloss meter or a light angle meter. A glossmeter or an optical goniometer is composed of a light source and a light receiver. The light source irradiates the solid surface to generate reflected light, and the light receiver receives the reflected light at a fixed angle. Generally, the solid surface to be measured is required to be flat and smooth. The surface of the hair has a natural radian, and the presence of scales is not smooth, and a bundle of hair may also have different appearances due to different placement methods, such as the looseness of the hair and the flying hair on the surface of the hair bundle. The extent will affect th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/57
Inventor 曹光群屠志淳陶莎孙培冬
Owner JIANGNAN UNIV
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