Robot vision tasks often use stereo methods to obtain 3-d information on the environment. This paper shows how color information can be utilized to improve the results of dense stereo matching as well as the results of edge-based stereo matching. A hierarchical chromatic Block Matching technique to obtain dense stereo correspondence is presented. The results have been compared to the results of...

Visual shade matching has remained a skill acquired through clinical experience. The purpose of this study was to evaluate the shade matching ability of dental students as they progress through their education. Sixty-five students, representing four levels of experience by year enrolled in dental school, participated in this study. Students were given a preclinical shade tab matching task. They...

The goal of this paper is to document the use of time series in color matching. Although time series are not commonly used for this purpose, the results obtained, based on the principle of similarity in time series using the Euclidean distance, establish the validity of its use for color matching applications. The accuracy of color matching was based on the measures of reflectivity versus wavel...

Template matching is a technique widely used for finding patterns in digital images. A good template matching should be able to detect template instances that have undergone geometric transformations. In this paper, we proposed a grayscale template matching algorithm named Ciratefi, invariant to rotation, scale, translation, brightness and contrast and its extension to color images. We introduc...

Abstract Let S be a set with n = w+ b points in general position in the plane, w of them white, and b of them black, where w and b are even numbers. We show that there exists a matching of points of the same color with straight line segments and no crossings which matches at least 83:33% of the points. We also derive an O(n logn) algorithm which achieves this guarantee. On the other hand, there...

This study aimed to determine the validity of the digital photocolorimetric (PCM) method in matching the color of human teeth. First, two Vitapan Classical shade guides, each containing 16 shade guide teeth, were visually shade matched, and digital photographs of each three pair of shade guide teeth were taken in a color matching booth. Secondly, visual shade matching of the upper central incis...

Objectives: To compare shade matching skills of color normal males and females. Material and Methods: A total of 174 dental students of both genders (117 females and 57 males, 20 to 25 years old), with no experience in color matching in dentistry, participated in the study. All recruited students passed the Ishihara color vision test for color deficiency, and matched the colors of eight shade t...

This paper investigates the role of color in global stereo matching approaches. In our evaluation study, we build various energy functions by combining nine color spaces with four dissimilarity functions and test their performance on 30 ground truth stereo pairs. Our experiments start by computing the matching scores via the absolute difference of color values. As is consistent with previous st...