Software based CA correction possible for Cheaper HD lens ? at DVinfo.net

Arjun Bhuyan · February 8th, 2006, 11:16 PM

Hi Guys,

I come from a photography background, and one of the software tools I find useful is DxO Technologies tool that evaluates photos, and based on optical profiles it has of camera/lens combinations, it corrects for issues like distortion and Chromatic Aberration (In my experience extremely successfully). This is particularly helpful for the cheaper lenses that have more such issues, but even my expensive canon L lens performance improves. I was wondering if we are large enough of a market for them to make something similar for video lens/camera combinations, and also if video compression makes this untenable

Technically, all it should require is lens profiling, and here is the caveat - significantly more processing power than used for photos. This could be a pre NLE step where all the video is run through the processor and adjusted.

I wouldn't mind paying $500 if it means not having to buy much more expensive lens, but approaching it in quality after processsing.

Here is a link to their software for photography -

http://www.dxo.com/en/photo/technology/distortion.php

I think it may take some time, but its definitely something I would find useful, if I go ahead purchasing the JVC HD100 w stock lens.

Thoughts?

Ken Hodson · February 9th, 2006, 02:27 PM

They don't seem to give much detail on using the software, you might need to email them.
Usually software such as this has a batch mode, where your video gets processed as individual frames. It would depend on how much user input per frame is needed and how long to process.
Preventative measures might be the best solution.
Learn how to shoot with the limits of a lens to avoid problems.
Some CC in most cases can minimize or remove the problem in many cases. CA is far more noticable on still shots and often invisable on motion shots. When you downsample for distro the problem becomes even less.
In most cases I think software such as this is over-kill and might only be needed if you were going through the expense of filmout or CA proved to be a problem in an extreem FX operation in post.

February 8th, 2006, 11:16 PM	#1
Arjun Bhuyan New Boot Join Date: Feb 2006 Posts: 5	Software based CA correction possible for Cheaper HD lens ? Hi Guys, I come from a photography background, and one of the software tools I find useful is DxO Technologies tool that evaluates photos, and based on optical profiles it has of camera/lens combinations, it corrects for issues like distortion and Chromatic Aberration (In my experience extremely successfully). This is particularly helpful for the cheaper lenses that have more such issues, but even my expensive canon L lens performance improves. I was wondering if we are large enough of a market for them to make something similar for video lens/camera combinations, and also if video compression makes this untenable Technically, all it should require is lens profiling, and here is the caveat - significantly more processing power than used for photos. This could be a pre NLE step where all the video is run through the processor and adjusted. I wouldn't mind paying $500 if it means not having to buy much more expensive lens, but approaching it in quality after processsing. Here is a link to their software for photography - http://www.dxo.com/en/photo/technology/distortion.php I think it may take some time, but its definitely something I would find useful, if I go ahead purchasing the JVC HD100 w stock lens. Thoughts?

February 9th, 2006, 02:27 PM	#2
Ken Hodson Trustee Join Date: Aug 2003 Location: Vancouver BC Canada Posts: 1,315	They don't seem to give much detail on using the software, you might need to email them. Usually software such as this has a batch mode, where your video gets processed as individual frames. It would depend on how much user input per frame is needed and how long to process. Preventative measures might be the best solution. Learn how to shoot with the limits of a lens to avoid problems. Some CC in most cases can minimize or remove the problem in many cases. CA is far more noticable on still shots and often invisable on motion shots. When you downsample for distro the problem becomes even less. In most cases I think software such as this is over-kill and might only be needed if you were going through the expense of filmout or CA proved to be a problem in an extreem FX operation in post. __________________ Damnit Jim, I'm a film maker not a sysytems tech.