Re: Advanced Lens Corrections

maxw55276389 · ‎Nov 16, 2018

Thank you for clarifying the workflow. So, does a solution exist which can remove distortions of arbitrary lenses? E.g. by analyzing a frame containing a checked pattern? I know there are some professional tools for that but they are quite pricey. Maybe some plugins for VirtualDub?

maxw55276389 · ‎Nov 14, 2018

Hello Rick, thank you for the reply! GoPro Studio was discontinued. After a longish search I found an installation file on the internet which I will try out later. However, I'm not so sure whether this software is able to remove the distortions of the hero7 black, since GoPro Studio was discontinued way before the hero7 was released. I will give it a try though. Regarding the workflow: Image stabilization should always be applied after lens correction. Otherwise one will see moving distortions while the footage is actually stable. These moving distortions cannot be removed by a static lens profile. So lens corrections after image stabilization are useless. At least that's how I understand it. I'm glad that you mention a test grid. I had exactly that idea. But which effect should I use to straighten a reference grid? There is a tool called "Adobe Lens Profile Creator". Apparently is can compute a lens profile for an arbitrary lens by analyzing some frames with check board patterns. Can I use these profiles in AE?

maxw55276389 · ‎Nov 14, 2018

Dear community, I am looking for a way to remove the lens distortions of a gorpo hero 7 black. I know that one can use the "optics compensation" effect to remove the fisheye distortion. It does work pretty well. However, when I use a stabilization procedure (Mercalli prodad) afterwards, I can still see that the image has slight distortions in it. This is because the image stabilization shifts the frames all the time and even the slightest position-dependent distortions become visible. It is as if the remaining distortions are moving within the video. So what I want is actually a more advanced lens distortion correction which can eliminate distortions beyond fisheye. Can somebody help me or give me a hint? I would be very thankful for any advice. I am using AE CC 2017.

maxw55276389 · ‎Mar 25, 2017

Let's say I want to apply time warp to a certain period of a clip. Therefore I split the clip into three parts: A, B and C. Then I apply time warp to part B of e.g. 50%. But what happens is that the actual footage is shifted by a factor of two. How to circumvent this behavior? My current solution is to prerender part B, delete the original part B and apply time warp to the prerendered footage. But this is kind of annoying and not very elegant. Anybody knows a better way?

maxw55276389 · ‎Mar 23, 2017

Hi everyone, does anybody know whether the whole AE project has to be rendered two times when I use two pass encoding in ME? If not, how does it work with only one rendering pass?

maxw55276389

maxw55276389

Activity

Re: Advanced Lens Corrections

Re: Advanced Lens Corrections

Advanced Lens Corrections

Prevent time shift when applying time warp.

question regarding two pass encoding