衰减，散射，水面建模，光线束，焦散。
Attenuation, Scattering, Modeling water surface, Light shafts, Caustics.
最后利用自检校光线束法平差进行相机的精确标定。
Finally, camera calibration with high accuracy is conducted using bundle adjustment with self-calibration.
一束束光线透过树丛照射下来，在地面上形成了大小不一的斑点。
Rays of light filtered through the trees, forming spots of varying sizes on the ground.
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