Exposure correction for time lapse

[Andrew Kreps]

Hey again,

I'm moving on to the next phase of my time lapse project, which is to
level out the exposure for the frames so that there isn't such a jumpy
quality to the movie. Given that the ship has sailed on changing the
camera settings (although I do still have a bulk of the RAW files),
what's my best bet for evening out the exposure?

I've looked into enfuse which will take in a set of images and combine
them, outputting a single image. It seems like the proper algorithm
is in there somewhere, but what I'd like to do is match the average
exposure of frame 2 to that of frame 1, and then just give me a
modified frame 2. Am I going the right direction by continuing to
study enfuse, or is there something more time lapse specific out
there?

[Seb Perez-D]

On Wed, Jan 7, 2009 at 00:30, Andrew Kreps <andrew...@gmail.com> wrote:

I've looked into enfuse which will take in a set of images and combine
them, outputting a single image.  It seems like the proper algorithm
is in there somewhere, but what I'd like to do is match the average
exposure of frame 2 to that of frame 1, and then just give me a
modified frame 2.  Am I going the right direction by continuing to
study enfuse, or is there something more time lapse specific out
there?

What about the exposure correction available in hugin 0.7? This would do just that (it may be difficult to get right with moving objects and varying white balance etc.)

Best,

Seb

[Bruno Postle]

On Wed 07-Jan-2009 at 08:36 +0100, Seb Perez-D wrote:
>On Wed, Jan 7, 2009 at 00:30, Andrew Kreps <andrew...@gmail.com> wrote:
>
>> I've looked into enfuse which will take in a set of images and combine
>> them, outputting a single image. It seems like the proper algorithm
>> is in there somewhere, but what I'd like to do is match the average
>> exposure of frame 2 to that of frame 1, and then just give me a
>> modified frame 2.

>What about the exposure correction available in hugin 0.7? This would do
>just that

This also has an equivalent command-line tool called vig_optimize.

(the tool claims to do vignetting calculations, but actually it does
any of the photometric parameters, so you can just optimise
exposure if you like).

--
Bruno

[Andrew Kreps]

On Wed, Jan 7, 2009 at 4:28 AM, Bruno Postle <br...@postle.net> wrote:
>>What about the exposure correction available in hugin 0.7? This would do
>>just that
>
> This also has an equivalent command-line tool called vig_optimize.
>

That sounds very cool, I'll check it out. I'm guessing hugin would
choke with my dataset as I'm at 28,000 frames currently, and I'm
generating about 1,500 per week.

Thanks again, this list is invaluable!

[Daniel M German]

Andrew Kreps twisted the bytes to say:

Andrew> On Wed, Jan 7, 2009 at 4:28 AM, Bruno Postle <br...@postle.net> wrote:
>>> What about the exposure correction available in hugin 0.7? This would do
>>> just that
>>
>> This also has an equivalent command-line tool called vig_optimize.
>>

Andrew> That sounds very cool, I'll check it out. I'm guessing hugin would
Andrew> choke with my dataset as I'm at 28,000 frames currently, and I'm
Andrew> generating about 1,500 per week.

Andrew> Thanks again, this list is invaluable!

Why don't you use PTblender? it is very good dealing with only 2
images at a time.

--dmg

[Andrew Kreps]

On Mon, Jan 12, 2009 at 12:46 PM, Daniel M German <d...@uvic.ca> wrote:
>
>
> Why don't you use PTblender? it is very good dealing with only 2
> images at a time.
>

Wow, that's even more perfect. Thank you!