Monodisperse quantum dots (QDs) were prepared by low-temperature process. The remarkable narrow emission peak of the QDs helps the liquid crystal displays (LCD) and electroluminescence displays (QD light-emitting diode, QLED) to generate wide color gamut performance. The range of the color gamut for QD light-converting device (QLCD) is controlled by both the QDs and color filters (CFs) in LCD, ...

This paper describes a method for developing a transform between two device CMYK spaces in a way that preserves information about the black separation. An important application of such a transform exists in desktop color printers for proofing of electronic files prepared for offset printing. Our method uses a novel printer inversion approach based on constrained optimization. An error function ...

Takeyuki Ajito Takashi Obi Masahiro Yamaguchi Nagaaki Ohyama Tokyo Institute of Technology Imaging Science and Engineering Laboratory 4259 Nagatsuta, Midori-ku Yokohama, 226-8503 Japan E-mail: [email protected] Abstract. To reproduce the natural color of an object through color imaging systems, the range of the reproducible color, i.e., the color gamut, of the color display devices must be...

Color is an important cue both in machine vision and image processing applications, despite its dependence upon illumination changes. We propose a color constancy algorithm that estimates both the set and the likelihood of feasible color mappings in respect to their frequency and effectiveness. The best among this set is selected to rendered back image colors as seen under a canonical light. Ex...

We test a number of the leading computational color constancy algorithms using a comprehensive set of images. These were of 33 different scenes under 11 different sources representative of common illumination conditions. The algorithms studied include two gray world methods, a version of the Retinex method, several variants of Forsyth's gamut-mapping method, Cardei et al.'s neural net method, a...

Hung-Shing Chen Shih-Han Chen Abstract — Owing to the fast developments of computer networks and color imaging technologies, there is a tendency towards remote proofing in the printing or textile industries. More cases such as cross-display color matching will occur in the future information society. The problems of color mismatching we usually find in cross-display devices have been widely dis...

Common tasks such as printing, displaying, and visualizing images may require a transformation of the input image from its source color space to a target color space. Such transformations include converting color images to grayscale for printing, mapping images to the gamuts of target display devices, preparing images for color deficient viewers, and fusing multispectral or multiprimary data in...

Color imaging technologies with higher dynamic range, wider color gamut, and greater bit depth require new and/or different ways of thinking about color. In particular, color appearance issues become more important. This paper discusses some recent research on the application of color and image appearance modeling to high-dynamic-range and wide-color-gamut imaging.

We analyze data from a gamut-mapping experiment using several statistical procedures for ranked data. In this experiment six gamut-mapping algorithms were applied to six different images and the results were ranked by 31 judges according to how well the images matched an original. We fitted two distance-based statistical models to the data: both analyses showed that aggregate preference among t...

This paper proposes a prototypical environment for gamut mapping in spectral space. Images are rendered in terms of light and material parameters by a symbolic ray tracer, and the parameter ranges are adjusted, without re-rendering, to bring the image into the output device’s spectral gamut. There is a growing disparity between the high dynamic range images produced by spectral renderers and th...