Abstract

Due to the strong reflection property of materials with smooth surfaces like ceramic and metal, it will cause saturation and the highlight phenomenon in the image when taking pictures of those materials. In order to solve this problem, a new algorithm which is based on reflection component separation (RCS) and priority region filling theory is designed. Firstly, the specular pixels in the image are found by comparing the pixel parameters. Then, the reflection components are separated and processed. However, for ceramic, metal and other objects with strong specular highlight, RCS theory will change color information of highlight pixels due to larger specular reflection component. In this situation, priority region filling theory was used to restore the color information. Finally, we implement 3D experiments on objects with strong reflecting surfaces like ceramic plate, ceramic bottle, marble pot and yellow plate. Experimental results show that, with the proposed method, the highlight caused by the strong reflecting surface can be well suppressed. The highlight pixel number of ceramic plate, ceramic bottle, marble pot and yellow plate, is decreased by 43.8 times, 41.4 times, 33.0 times, and 10.1 times. Three-dimensional reconstruction results show that highlight areas were significantly reduced.

Highlights

  • Structured light (SL) vision measurement has drawn much attention due to its potential for three-dimensional (3D) applications to diverse areas, such as re-engineering, 3D games, industrial inspection, object recognition, and clothing design, to name only a few [1]

  • We proposed a specular highlight removal method based on reflection component separation (RCS) and priority pixel filling theory, which does not depend on either polarization or image segmentation

  • When only the diffuse reflection component is contained in the pixel β( x ) = 0, the chroma value is independent of the diffuse reflection weighting factor α( x )

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Summary

Introduction

Structured light (SL) vision measurement has drawn much attention due to its potential for three-dimensional (3D) applications to diverse areas, such as re-engineering, 3D games, industrial inspection, object recognition, and clothing design, to name only a few [1]. A single input image method requires complex color segmentation to deal with multi-colored images For this problem, we proposed a specular highlight removal method based on reflection component separation (RCS) and priority pixel filling theory, which does not depend on either polarization or image segmentation. We proposed a specular highlight removal method based on reflection component separation (RCS) and priority pixel filling theory, which does not depend on either polarization or image segmentation This method is based on color information completely without requiring any geometrical information of the object surface. For ceramic, metal and other objects with strong specular highlight, RCS theory will change color information of highlight pixel due to larger specular reflection component. The proposed method was applied to reconstruct ceramic surfaces with strong specular highlights

Specular Highlight Removal
Reflection Model
Selection of Highlight Pixels
Specular Reflection Component Removal Theory
Highlight Region Inpainting Based on Priority Theory
Principal of Region Filling Method Based on Priority Theory
System Introduction
Visual Comparisons
Quantitative Analysis
Objective Performance Comparisons
Conclusions
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