A good color description starts with the availability of accurate color-matching functions (CMFs) or cone fundamentals (CF). Recent work indicates a discrepancy between visual metamers and those calculated using standard CIE CMFs other CMF sets, especially for narrowband sources. In current study, 54 observers (varying in age, gender, ethnicity, eye color) performed series achromatic experiment...

We investigate color constancy for real 2D paper samples using a successive matching paradigm in which the observer memorizes a reference surface color under neutral illumination and after a temporal interval selects a matching test surface under the same or different illumination. We find significant effects of the illumination, reference surface, and their interaction on the matching error. W...

Although the use of computer color matching can reduce the influence of subjective factors by technicians, matching the color of a natural tooth with a ceramic restoration is still one of the most challenging topics in esthetic prosthodontics. Back propagation neural network (BPNN) has already been introduced into the computer color matching in dentistry, but it has disadvantages such as unstab...

Crawford's (1965) experiment [Vision Res. 5, 71-78], implies that there is a failure of linearity when maximum saturation color matches are compared to Maxwell matches. This implication was tested by making the same maximum saturation matches with and without the superposition of a monochromatic desaturating light. A nonlinearity in color matching for short wavelengths was measured without the ...

these Amax variations that were both based on the Stiles-Burch 100 color-matching functions [Opt. Acta 6, 1 (1959)]: one that suggested that the Amax values for individual cone classes fall into discrete subgroups [J. Neitz and G. H. Jacobs, in Colour Vision Deficiencies IX, B. Drum and G. Verriest, eds. (Kluwer Academic, Dordrecht, The Netherlands, 1989)] and one that failed to find discrete c...

Many research results indicated that the surround condition of image display could be a very important factor for image appearance. The most significant impact of the surround on image appearance is the change in perceived image contrast. The chromatic perception of the image will also depend on the color of surround. In this research, a psychophysical experiment was carried out to investigate ...

In this paper we present a new matching method called Tuple Matching (TM), which is an algorithm for matching of signatures. Since signatures can contain arbitrary features like color, shape, and texture we focus on signatures that are generated from color histograms by using Graph Theoretical Clustering (GT-Clustering) in this paper. In contrast to Histogram Intersection [3] (HI) or similar ap...

We consider how to preprocess n colored points in the plane such that later, given a multiset of colors, we can quickly find an axisaligned rectangle containing a subset of the points with exactly those colors, if one exists. We first give an index that uses o(n) space and o(n) query time when there are O(1) distinct colors. We then restrict our attention to the case in which there are only two...

A color matching experiment was designed and carried out to estimate human observers’ color matching functions (CMFs). 61 colornormal observers participated in the experiment. Their results were traced back to physiological factors using a mathematical vision model. The experiment time was 15 minutes, which is much faster than previous research aimed at determining color matching functions.

Matching clothes is a challenging task for blind people. In this paper, we propose a new computer vision-based technology of clothes matching to help blind or color blind people by using a pair of images from two different clothes captured by a camera. A mini-laptop or a PDA can be used to perform the texture and color matching process. The proposed method can handle clothes in uniform color wi...