三维模型与视频素材的完美结合——AE插件Element 3D与Track camera技术的实际应用--《影视制作》2014年09期
三维模型与视频素材的完美结合——AE插件Element 3D与Track camera技术的实际应用
【摘要】：相较于传统的AE针对3D动画合成中出现的各种繁琐的操作,如摄像机同步、光影匹配等等,Element 3D都可以让特效师直接在AE里完成,而不需要考虑摄像机和光影迁移等诸多问题。配合AE内置的Tracker camera功能,更是可以完成各类复杂的三维后期合成特效,大大降低了以往摄像机反求搭建三维场景的难度和渲染负担。
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【分类号】：TP391.41【正文快照】：
1 以及镜头焦距等一系列参数。有了摄像机的运动轨迹后,我们就可以将在三维制作软件中按摄像机轨迹制作、摆放的任意模型导入合成软件,将模型与拍摄的视Track camera与曰ement 3D白勺频素材结合。长期以来,摄像机反求技术都是影视制作中让人欲罢不能的先进技术,从好莱坞的影视
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京公网安备75号Tutorial: After Effects CS6 3D Camera Tracker
In the above video, Jon Carr, demonstrates the new 3D camera tracker in . &The tutorial covers two different uses of the camera tracker: incorporating 3D text and also basic visual effects.
The 3D camera tracker is incredibly easy to use. &Once you have your clip imported and you have created a new composition with it, you simply right click the clip and select &track camera&. &After Effects will analyze the shot for you and apply a multitude of tracking points throughout the shot. &The difference in color between the points doesn’t mean anything – it’s just a tool for differentiating between them since there are so many. &However, the size of the points denotes which of those points are closer to the camera (in the virtual space that the 3D camera tracker has built using 2D track points and 3D solve points).
After you have your points mapped out, you may want to refine them a bit. &Under the advanced tab, you can check out the average error to see how accurately your scene has been mapped. &The value here is the average distance between the 3D solve points and the 2D track points. &In our example we came out with an error of 0.71 – which is pretty good. &Generally though anything that goes above 1.0 may cause you some issues, and so you may want to further refine your camera track. &There are a couple different ways you might go about this. First you can remove points that are not attaching to the scene well (perhaps something passes through your frame and throws them off) by using the lasso tool and simply deleting them so AE is not using them to solve the camera. &Additionally, if you are still having trouble – you can give the camera tracker a little more information to work with by letting it know any of the following: you are using a variable zoom in the shot, you are panning or tilting on a tripod, or that your camera is completely still (so it doesn’t track the camera to character action).
In order to apply 3D text to your shot, you must select a point (or a number of points) that you want the text to &follow& (your 3D image will be bound to the camera that is created by the tracking of these points). &This is easy to do – simply right click and select &create text and camera.& & The text will appear on your screen next to the tracking point which you selected. &You can now edit the text, adjust its size, font, origin point, etc. &In our example we also adjusted its orientation so that it appeared to be standing upright, as opposed to laying flat – which was its default. &You can also apply other effects to your text as well. &In the tutorial we add a shadow and light to the text using the same selected points to create a flat plane (which you can’t see) that catches the shadow of the text, which we were able to refine into the shape of the top of the building. &Of course there are many other effects that you can add to your text to create some visual interest – you should experiment. &You can also change what renderer AE using (top right corner of viewer window). &The default is the Classic 3D renderer, but you can switch of to Ray-traced 3D – which will allow you to extrude your text into a 3D shape. &A word of caution though – this requires a fast machine. &It’s possible to drop the resolution of the rendered effect (we had to drop to &fast draft&) in order to lessen the taxation on your system, but it still requires some heavy processing power.
You can also use the camera tracker to create visual effects. &In our tutorial we do a simple visual effect, replacing the number on the helipad of the US Bank building. &However, you can use these same principals for dropping in 3D elements, rotoscoping, sign and background replacement, etc. &To do this, first make sure the layer with your visual effect on it is a 3D layer (so that it exists in the same virtual space created by your 3D camera tracking points). &Next,&select the point or points you want to bind your effect to, right-click them, and create a null object. &You then need to select the pick whip on your visual effect layer and drag it to the null that you just created. &This parents your visual effect to the null and orients it for you in the 3D space so that you don’t have to fumble around with key framing the effect on the X, Y, and Z axis. &
Please make sure to watch the video for a more in depth explanation of the 3D camera tracker and some of its uses.&The 3D camera tracker is an incredible new tool that comes with CS 6, and it makes dropping effects into your scene easier than ever before.
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July 2008 &(1)求Camera 3d track&3d elements 达人_ae吧_百度贴吧
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&签到排名：今日本吧第个签到，本吧因你更精彩，明天继续来努力！
本吧签到人数：0成为超级会员，使用一键签到本月漏签0次！成为超级会员，赠送8张补签卡连续签到：天&&累计签到：天超级会员单次开通12个月以上，赠送连续签到卡3张
关注：386,139贴子：
求Camera 3d track&3d elements 达人收藏
怎把大型的3d 模型准确的放进去，不是选3点然后制作null吗？我的都有很大偏差另外问3D 模型的阴影怎做，移动的模糊尼?
奇迹曼特ae课程培训AE C4D Premiere photoshop A i一周即入门直到ae精通,独立运用前期创意,色彩构图,运动匹配,音乐节奏,调色,特效制作等技能独立做项目
同求。。。。。
的确是选点制作null，不过需要用到的实际上只有一个null。。。多做几个null只是为了寻找到一个合适的。。另外，偏差这些，在camera tracker做solve camera的时候，尽量使分析出的误差小于1，否则会有较大抖动
至于阴影，element提供了基于自身光线生成的阴影，如果要更真实的，只有等待插件更新了。
当然，还可以选择固态层+遮罩+模糊做阴影，然后一同绑定到null。。。无名触，你潜水多久了。。
阴影用脚本可以做到！
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为兴趣而生，贴吧更懂你。或【求助】3D CAMERA TRACK出错啦~~~救命啊 大神们~~~！！！！_ae吧_百度贴吧
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&签到排名：今日本吧第个签到，本吧因你更精彩，明天继续来努力！
本吧签到人数：0成为超级会员，使用一键签到本月漏签0次！成为超级会员，赠送8张补签卡连续签到：天&&累计签到：天超级会员单次开通12个月以上，赠送连续签到卡3张
关注：386,139贴子：
【求助】3D CAMERA TRACK出错啦~~~救命啊 大神们~~~！！！！收藏
就是这条提示unable to obtain dynamiclink server怎么也搞不定 跪求 帮助
奇迹曼特ae课程培训AE C4D Premiere photoshop A i一周即入门直到ae精通,独立运用前期创意,色彩构图,运动匹配,音乐节奏,调色,特效制作等技能独立做项目
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为兴趣而生，贴吧更懂你。或}