We present in this paper the IMOGENE II system, a massively parallel Multi-SIMD graphics system. This architecture uses a new rasterization scheme combining Object Parallelism and Parallel Virtual Buffers. This scheme leads to a better efficiency than other massively parallel SHvlD systems, and allows a cost-effective, powerful and easily expandabJe system to be designed. The syst.em consists o...

| This paper presents an architecture capable of generating two dimensional images of volume data at video rates. This architecture ts into an image synthesis pipeline and uses only simple arithmetic operations and a look-up table to generate two dimensional images in real time. The shading algorithm is the grey-level gradient algorithm for shading volume data. Hardware simulations of the criti...

In many parts of Iran high light intensities during summer can induce stress in cut flower production under open field and greenhouse conditions. Despite roses prefer sunny places for optimum growth, but in practice some levels of rough shading is applied in greenhouse production to improve the quality of cut flowers. So, it is useful to find the light intensities under which different rose cul...

This article is devoted to the relevant problem of increasing efficiency PV systems. The presented analysis discusses available methods for improving power generation modules under partial shading. Mathematical models loss calculation were compiled based on results this analysis. proposed approach minimizes negative impact shading energy production modules. It equalization voltages parallel-con...

introduction lentil (lens culinaris medic) is a member of the leguminosae (fabaceae) family and an important pulse crop grown in iran. growth of lentil plant is highly sensitive to environmental conditions, especially solar radiation, high temperature and water availability. one of the important reasons for unstable lentil yield is the indeterminate growth habit of lentil plants. extensive vege...

We investigated whether specular highlights facilitate the perception of shape from shading in a search paradigm and how highlights interact with shading to facilitate this perception. Our results indicated that stimuli containing highlights led to shorter searching time with the dependence on the light source direction (top lights make searching faster), suggesting that highlights indeed facil...

Human ability to process visual information of outside world is yet far ahead of manmade systems in accuracy and speed. In particular, human beings can perceive 3-D object from various cues, such as binocular disparity and monocular shading cues. Understanding of the mechanism of human visual processing will lead to a breakthrough in creating artificial visual systems. Here, we study the human ...

An algorithm for generating anti-aliased polygons is described. The algorithm is simple, but powerful, combining color blending, Gouraud shading and Z-buffer hidden surface removal. A test bed has been constructed which consists of a Versabus M68000 computer (the graphics processor) and a custom interface between the M68000 and the frame buffer of a raster display. Written in "C", the package f...

Birds behave as if they quickly and accurately perceive an object-filled visual world. Beyond the extensive research with pigeons, however, there is a large and important gap in our knowledge about the mechanisms of object perception and recognition in other avian visual systems. The pattern of shading reflected from the surfaces of objects is one important optical feature that provides fundame...