在2D实拍视频中合成3D动画
发表时间：2005-10-26 9. Blur and Noise your new best friends.
9. 模糊和噪声——你最好的朋友
In my opinion you should always add an small amount of noise and blur to CG images, to avoid that hard edged look we always end up with. In compositing blur and noise are your best friends.
我认为你应该总是为CG图像添加少量的噪声和模糊，来避免以僵硬的边界告终。在合成中模糊和噪声是你最好的朋友。
All video footage will end up looking pretty poor quality when you zoom in, however your CG elements will always look crystal clear. You should take time to blur and add noise to your CG element so that it matches the background.
虽然你的CG元素总是看上去水晶般清晰，但所有的视频素材最终应在放大时看起来很破。
You can see from the two images above that the CG element is far cleaner and sharper than a close up of the cup in the background. If left like this the image will look very fake with the CG element will be very obvious to the viewer
从上面两幅图中可以看出CG元素在近看时比背景中的杯子要清晰、尖锐的多。如果最终效果像左图一样图像会显得很假，CG元素对观众会很扎眼。
10. Brightness, Contrast, Levels and other hellish tasks.
10. 亮度、对比度、层级和其他艰巨的任务。
Even though you attempted to match the lighting in MAX, you'll still have to work hard to match the contrast, brightness and color of the CG element and the background. This is a highly skilled task and takes a good eye for color, the best advice I can offer you is to keep getting other's opinions and to keep taking a break then coming back to the image to see if you can see any new visual glitches.
虽然你在MAX中努力对齐灯光，你仍旧需要调整CG元素和背景的亮度、对比度、层级，这需要大量经验和对色彩敏锐的眼睛，我可以给你的最好的建议是听取别人的意见、休息一会后回来看图像是否有新发现的小差错。
There are a lot of expensive high end packages available to help match two images together, but nothing beats a good eye and sense of composition.
有许多昂贵的高级软件包用于将两幅图像合成为一幅，但一切都敌不过一双敏锐的眼睛和对合成的直觉。
If you're still having trouble, try turning your head upside down (don't laugh) and looking at the image, this will help you see the composition with a fresh perspective and to find any errors you missed.
如果你还有困难，试着上下移动你的头（不要笑）并观察图像，这将帮你以新的视角看到合成的小错误。
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