Recent models of early visual processing espouse a computational approach to vision. Such computational theories can in principle be implemented on a computer system to demonstrate their utility and e cacy. However with the development of computer graphics technology, another form of computer simulation can be envisioned: that is, to visually experience the effects of a model. Thus, a model of ...

Intelligent multimedia representation systems (e.g. (Wahlster et al., 1993), (Andre et al., 1996), (Feiner and McKeown, 1993)) have to select appropriate expressions in different modes (texts, graphics and animations) and to coordinate them 1. For both tasks, an explicit representation of the content of the multimodal expressions is required. An important aspect of the media coordination is to ...

The Human Visual System (HVS) is a key part of the rendering pipeline. The human eye is only capable of sensing image detail in a 2◦ foveal region, relying on rapid eye movements, or saccades, to jump between points of interest. These points of interest are prioritised based on the saliency of the objects in the scene or the task the user is performing. These ”glimpses” of a scene are then asse...

Non-photorealistic rendering (NPR) is an area of computer graphics that studies artistic expressions for digital art. Unlike traditional computer graphics that emphasizes photorealism, NPR explores a wide variety of artistic styles including painting, sketching, and animated cartoons, and develops algorithms for recreating them. One art form that is largely unexplored in computer graphics is Op...

Content-Based Image Retrieval systems can often return poor results when attempting to match images with extraneous feature information such as complex backgrounds, shadows, or frames. As a solution, this project aimed to provide a semi-automatic object extraction tool, the 'Intelligent Flood Fill'. This tool would also help users of graphics packages, who can find current object extraction too...

AIM To provide a simple test that detects the onset of age related maculopathy (ARM), and can be used to monitor its severity. METHODS Colour contrast sensitivity was measured using computer graphics techniques. Colour thresholds were measured along tritan and protan colour confusion axes in the presence of dynamic luminance noise. Thresholds were determined separately for two sizes of optoty...

a participatory rural appraisal technique (prat) was used to obtain information from 132 randomly selected turkey farmers in two out of four agricultural development zones in kwara state, nigeria. data were obtained on socio-occupational status of farmers, their production objectives, experience, flock structure, management practices, marketing and consumption of turkey eggs. the results showed...