Natural scenes on mobile devices.

<p>a. Natural scenes on the iPhone. b. Natural scenes on the iPad. These two nature scenes on mobile devices are also rendered using the adaptive visualization approach presented in this paper. The applications show that the adaptive visualization approach is suitable for mobile devices, and it can improve the quality and speed of rendering effectively.</p

A Time-Critical Adaptive Approach for Visualizing Natural Scenes on Different Devices

<div><p>To automatically adapt to various hardware and software environments on different devices, this paper presents a time-critical adaptive approach for visualizing natural scenes. In this method, a simplified expression of a tree model is used for different devices. The best rendering scheme is intelligently selected to generate a particular scene by estimating the rendering time of trees based on their visual importance. Therefore, this approach can ensure the reality of natural scenes while maintaining a constant frame rate for their interactive display. To verify its effectiveness and flexibility, this method is applied in different devices, such as a desktop computer, laptop, iPad and smart phone. Applications show that the method proposed in this paper can not only adapt to devices with different computing abilities and system resources very well but can also achieve rather good visual realism and a constant frame rate for natural scenes.</p></div

Natural scenes on computers.

<p>a. Adaptive visualization approach on computer 1. b. Adaptive visualization approach on computer 2. These two nature scenes are rendered using the adaptive visualization approach presented in this paper. The applications show that the adaptive visualization approach can improve the quality and speed of rendering effectively.</p

Importance information (α1 = 0.6, α2 = 0.4).

<p>Importance information (α1 = 0.6, α2 = 0.4).</p

Frame rates for different tree numbers on the iPhone.

<p>Frame rates for different tree numbers on the iPhone.</p

Comparison of rendering time on computer 1.

<p>The blue line represents the rendering time before using time-critical technology on computer 1, while the red line represents the rendering time after using time-critical technology. The red line is much smoother, and it takes less time to render natural scenes than the blue line, indicating that time-critical technology is effective and reasonable.</p

LOD distributions on computer 1.

<p>LOD distributions on computer 1.</p

Natural scene of traditional LOD.

<p>a. Scene at viewpoint p1 with traditional LOD. With traditional LOD method, at viewpoint p1, the LOD level of Tree 1 and Tree2 is LOD2. b. Scene at viewpoint p2 with traditional LOD. At viewpoint p2, the LOD level of Tree 1 and Tree 2 is LOD1.</p

Configuration of computer 2.

<p>Configuration of computer 2.</p

Comparison of rendering time on iPhone.

<p>The blue line represents the rendering time before using time-critical technology on iPhone, and it always takes more rendering time than the red line. Furthermore, the red line is also smoother than the blue line; indicating that time-critical technology is effective and reasonable.</p