Color Figures in BJ: RGB versus CMYK

RGB Color Spaces

Color transformation for the compression of CMYK images

A CMYK image is often viewed as a large amount of device-dependent data ready to be printed. In several circunstances, CMYK data needs to be compressed, but the conversion to and from device-independent spaces is imprecise at best. In this paper, with the goal of compressing CMYK images, color space transformations were studied. In order to have a practical importance we developed a a new trans...

The Prismatic Color Space for Rgb Computations

In the spirit of the HSV color space, we introduce a simple transform of the RGB color cube into a light/dark dimension and a 2D hue. The hue is a normalized (barycentric) triangle with pure red, green, and blue at the vertices, often called the Maxwell Color Triangle. Each cross section of the space is the same barycentric triangle, and the light/dark dimension runs zero to one for each hue so...

Color measurement with an RGB camera

A review of technical papers on the subject of the accuracy of RGB to CIELAB conversion is provided. In general, these papers concentrate on a single limiting factor, the spectral response of the camera. Even with the assumption that all other parts of the system contribute insignificantly to the error, the accuracy reported is still considerably worse than one would like from a color measureme...

Hierarchical Histogram for RGB Color Modeling

A histogram-like model is suggested for the representation of multi-dimensional distributions such as RGB colors of subjects in tracking and segmentation tasks. Unlike the normal 3-D histogram it can be estimated from the limited amount of training data without the need to reduce the precision of the measured data. The proposed hierarchical histogram model (HHM) is compared to the well known Ga...