An adaptive technique for color image segmentation is presented in this paper. The segmentation is performed using a multiresolution scheme and considering the background areas have quite uniform color features at a low-resolution representation of the image. First, a pyramidal representation of the original image is built. Then segmentation is improved iteratively at each resolution using colo...

This paper introduce an equation to convert from RGB to RYB and the inverse conversion equation as a model of RYB color space. Proposal RYB color model allows paint like compositing easily without complex configuration of parameters such as Kubelka-Munk model. Keywords— RYB; Color; Compositing; Mixing

Until recently I have always used L*a*b* as a very convenient tool to transform color data into a sensible isotropic color space. Since isotropic spaces are uniform in all directions, the space performed the difficult task of making sure that differences in hue, lightness and chroma were all taken into account and that any pair of equal distances between two colors, regardless of their location...

The Fast Development of the image capturing in digital form leads to the availability of large databases of images. The manipulation and management of images within these databases depend mainly on the user interface and the search algorithm used to search these huge databases for images, there are two search methods for searching within image databases: Text-Based and Content-Based. In this pa...

Since more than 50 years texture in image material is a topic of research. Hereby, color was ignored mostly. This study compares 70 different configurations for texture analysis, using four features. For the configurations we used: (i) a gray value texture descriptor: the co-occurrence matrix and a color texture descriptor: the color correlogram, (ii) six color spaces, and (iii) several quantiz...

This paper proposes a solution to the problem of finding the boundary of the gamut of a color printing device or of a color image. A surface triangulation of a set of points in the color space is computed using an alpha-shape, which is a generalization of a convex hull applicable also to nonconvex solids. The desired level of detail can be controlled by means of an alpha parameter. A method for...

Recently Logvinenko introduced a new objectcolor space, establishing a complete color atlas that is invariant to illumination [2]. However, the existing implementation for calculating the proposed color descriptors is computationally expensive and does not work for all types of illuminants. A new algorithm is presented that allows for an efficient calculation of Logvinenko’s color descriptors f...