Colour constancy remains an important topic in colour research today, as it has for more than a century. Technological advances in digital capture and image processing have expanded studies of this constancy from individual colour patches to entire complex images. In Land’s Colour Mondrian experiment he controlled uniform illumination over an array of more than 100 coloured papers to demonstrat...

Monitor characterization has taken on new importance for non-professional users, who are not usually equipped to make photometric measurements. Our purpose was to examine some of the visual judgments used in characterization schemes that have been proposed for web users. We studied adjusting brightness to set the black level, banding effects due to digitization, and gamma estimation in the ligh...

A colour holographic display is considered the ultimate apparatus to provide the most natural 3D viewing experience. It encodes a 3D scene as holographic patterns that then are used to reproduce the optical wavefront. The main challenge at present is for the existing technologies to cope with the full information bandwidth required for the computation and display of holographic video. We have d...

This study is a preliminary investigation towards the design of effective colour spaces and colour tools to allow users to quickly and accurately select a given colour in a digital-display environment. It has been shown that many non-expert users find the RGB colour space to be non-intuitive. The choice of colour space on various visual tasks has also been shown to be an important factor and th...

Many image display applications and printing devices allow only limited number of colours. They have limited computational power and storage to produce high quality outputs on high bit-depth colour image. A dithering technique is called for here in order to improve the perceptual visual quality of the limited bitdepth images. A dithered image is represented by a natural colour in the low bit de...

M. R. Rosen, Y. Zhao, P. Rao, D. B. O’Sullivan and R. S. Berns *Munsell Color Science Laboratory, Rochester Institute of Technology, Rochester, NY (USA) †Interactive Telecommunications Program, New York University, New York, NY (USA) Corresponding author: M. R. Rosen ([email protected]) ABSTRACT For many low-end applications, it is beyond reach to follow accepted procedures for making colour pr...

In this paper, we deal with parallel-transmission visible light communication (PT-VLC) systems using Colour-Shift Keying (CSK). We construct a prototype of PT-VLC systems utilizing a Liquid Crystal Display (LCD) as a transmitter and an Image Sensor (IS) as a receiver. We also propose a new colour estimation algorithm for CSK and integrate the algorithm into the prototype. We show effectiveness ...

While tone mapping operation of high dynamic range (HDR) images for realistic display is commonly researched, scientific visualization for analysing scene luminance within HDR image has much less attention from researches. This paper has presented and implemented an approach for the reproduction and visualization of the colour information in HDR images. We attempt several simple colour visualiz...

The design and development of a versatile active illumination system is described. The necessary system components are related to existing techniques which utilise various forms of structured light to extract range data. The system is composed of a high power stroboscopic illuminator coupled with a high resolution liquid crystal display and a precision actuated mirror. A colour filtering device...