单硬件限制下的电磁环境加速绘制

单硬件实现的高效电磁环境绘制适用范围更广；但是，并行光线投射绘制电磁环境时，其效率受硬件性能制约。在研究硬件限制并行光线投射效率的基础上，提出一种面向硬件制约的像素插值方法。当硬件限制并行光线投射绘制不能实时完成时，减少并行投射的光线数量，即部分图像像素由光线投射生成，其余像素插值生成。像素插值以图像质量换取执行效率，当图像更新停顿时重新使用光线投射生成插值获得的像素，以恢复图像内容。实验结果表明，低硬件配置条件下，像素插值能够大幅度提高绘制图像的生成效率。同时，对比多个体数据的绘制效果和误差统计得出：电磁环境数据场最适合使用像素插值方法。
Electromagnetic environment with a high efficiency based on single device supports has wide range of applications. But the efficiency of parallel ray-casting for rendering electromagnetic environment is restricted by the device. Based on researching the restriction of device for parallel ray-casting, a pixel interpolation method focusing on the restriction was presented. The number of rays was reduced when the parallel ray-casting rendering under device restriction couldn’t be completed immediately, namely, a part of pixels in the rendering image were generated by ray-casting and the rest pixels through interpolation. Pixel interpolation got rendering efficiency at the cost of image quality, so when image update paused, the interpolated pixels were regenerated to recover image quality. The experiments show that pixel interpolation obviously improves rendering efficiency when implemented on a low device. Compared with the rendering images of some volume data and the errors in these images, the electromagnetic environment data has the best rendering result, which proves that pixels interpolation is useable especially for rendering electromagnetic environment on a low device.