Backward Ray Tracing Essay

Ray tracing is a rendering technique that has flickered just over the sphere for decades. Many tactics that are difficult to apply with other techniques are easy with ray tracing, including shadows, reflections, and refracted light. The importance of ray tracing technique can be understood in such a way that it is the most researched and awarded technique among all other computer graphics techniques. The computer graphics research center is now a days intensely focusing on ray tracing technology which has boosted up the interest of researchers all over the world. Creating ‘photo-realistic’ images has been a mission of computer graphics for many years. Earlier, this technique was restricted only for drawing images, designing mirror and lenses for telescopes and other optical

This process is done when our vision is changed by an image plane consisting of pixels. Out of several pixels any one pixel will be hit by the light particles emanated. This process is continued until all the pixel are regulated, producing a computer generated image. In short, this technique makes it possible to detect how light is carried in nature on computer.

B. Backward Ray Tracing

Backward ray tracing, also known as eye ray tracing, was introduced to make ray tracing more efficient. It starts from a viewplane by creating an eye ray at the eye. The rays are ejected into different directions until they get hit with the surface. The first object the eye ray hits is the object that will be visible from that viewplane point. After the tracer allows the light to reflect back, it finds out how much light it requires to illuminate the surface. Then, it estimates the exact coloring and shading of that point in the viewplane and displays it on the corresponding pixel on the monitor.

IMAGE SYNTHESIS USING RAY