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Method for detecting surface orange by analyzing intensity images of shadows formed on surface of object by light source

A technology of object surface and brightness image, which is applied in the field of orange peel quality detection on the surface of high gloss materials and brightness image detection surface orange peel, can solve the problems of high hardware and detection environment requirements, high cost and other problems, and achieves fast detection speed, less demanding effects

Inactive Publication Date: 2009-09-16
WUHAN UNIV OF TECH
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Problems solved by technology

There are disadvantages that the equipment has high requirements on hardware and detection environment, and the cost is expensive

Method used

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  • Method for detecting surface orange by analyzing intensity images of shadows formed on surface of object by light source
  • Method for detecting surface orange by analyzing intensity images of shadows formed on surface of object by light source
  • Method for detecting surface orange by analyzing intensity images of shadows formed on surface of object by light source

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] Concrete steps of the present invention are:

[0034] Step 1: Image Acquisition:

[0035] The light source and image acquisition components are fixed in a black box to form a set of image acquisition equipment. There are two upper and lower rectangular slits on the surface of the black box, and an image acquisition hole is formed between the slits, in which image acquisition components, such as CMOS / CDT lenses or sensors, are built. The black box has two built-in light strips composed of several standard LED light sources, and a diffuser is placed between the light strips and the slit. When the LED light strip is turned on, the light emitted by it passes through the diffuser and the slit to form two uniform rectangular light strips. At this time, the rectangular light band illuminates the surface of the object, and the two-dimensiona...

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Abstract

The invention relates to a method for detecting surface orange by analyzing intensity images of shadows formed on the surface of an object by a light source, comprising the following steps: step 1: obtaining intensity images of shadows of the light source on the surface of the object detected; step 2: analyzing images by the detection algorithm to obtain the texture structure data of the surface orange; and step 3: converting the data obtained in the range of 0-99.9 according to the different detection objects and different calibration parameters to obtain the evaluation of the orange, the higher the value is, the less orange on the surface and better quality of the surface are. The invention has the beneficial effects of low requirements of hardware and detection environment, fast detection speed, and high-efficiency and mass detection of the texture structure of the orange on the surface of the object with high reflecting ability.

Description

technical field [0001] The invention belongs to the fields of painting and computer application, in particular to a method for detecting the quality of orange peel on the surface of high-gloss materials, specifically a method for detecting surface orange peel by analyzing the brightness image of an image formed by a light source on the surface of an object. Background technique [0002] The appearance of the coating surface presents many semicircular protrusions, and the corrugation like orange peel is called orange peel. [0003] In the early days, the quality of orange peel on the surface of high-gloss objects was mainly detected by human eyes. However, because there is no clear evaluation standard, and the observer's subjective feelings and personal experience are greatly affected, the results are not objective enough. [0004] Later, people used a roughness meter for evaluation, using different degrees of physical orange peel as a visual evaluation standard. But this ki...

Claims

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Application Information

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IPC IPC(8): G01B11/30G06T7/00
Inventor 熊盛武赵斌林婉如谢啸虎段鹏飞
Owner WUHAN UNIV OF TECH
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