The presence of lignin and its degraded products such as tannin and humic acids is the main reason causing the aerobically-treated palm oil mill effluent (AT-POME) to display colour at the point of discharge. In this work, a hybrid method is developed to treat the AT-POME sample that was conventionally treated by biological method. This hybrid method combines coagulation and nanofiltration (NF)...

High dynamic range (HDR) displays capable of reproducing scenes of high luminance (exceeding 2,000 cd/m2) and contrast (more than 10,000:1) are a useful tool for research on visual performance, image quality or colour appearance. In this paper, we describe a projector-based HDR display, giving details on its hardware components and software for driving and calibrating the display. We report the...

When a colour/orientation conjunction search display is immediately preceded by a display that shows either the colour or the orientation of each upcoming search item, search is faster after colour-preview than after orientation-preview. One explanation for this feature asymmetry is that colour has priority access to attentional selection relative to features such as orientation and size. In su...

With the advent of Internet and mobile devices client services and other print production are migrating more and more to online platforms. In a recent technology changeover it has become obvious that there is a growing number of printers and customers who are interested in the print service providers to expand their business to online and mobile platforms. With this technological transition the...

This paper presents the computerised simulation of colour-blindness and proposes a colour enhancement technique to aid colour-blinded people to use Visual Display Units (VDU). With the red-green colour perception difficulties, the ISH model has been used to develop the algorithms. The simulator and colour enhancement have been tested by colour-blind people and compared to existing simulators fo...

The ciecam02 colour appearance model was developed to allow prediction of accurate colour appearance under various viewing conditions. In this study, a software module, based on mathematical transformations of the ciecam02 model, was designed and implemented. Unlike the previous software modules, which were allowing use of only a limited choice of common standardized icc display profiles, the d...

Previous research has shown that when observers search for targets defined by a particular colour, attention can be directed rapidly and independently to two target objects that appear in close temporal proximity. We investigated how such rapid attention shifts are modulated by task instructions to selectively attend versus ignore one of these objects. Two search displays that both contained a ...

A novel scheme for visual communication by means of mobile devices with limited colour display capability is proposed. A colour quantization technique is first proposed based on the perception of human visual system on skin colour. An efficient coding scheme is then developed to compress colour quantised video at very low bit rate.