Real RAW from R3D?

[Oleg P.]

Hi guys,

Is there a way to convert RedCode (R3D) to basic RAW without any filtering/coloring?
I just want to pass it through my debayer software that accepts only .raw & .rvs.

Thanks.

 

[Jeff Kilgroe]

As of right now, no official way. RED is trying to keep third-party debayer out of the loop so they can ensure consistent results across multiple software and hardware platforms. It's somewhat of an unfortunate situation due to circumstances about 2~3 years ago, before there was the RED SDK, when developers were coming up with their own ways of interpreting the R3D files and processing the images. Most of those methods were klunky and the results were inconsistent and often really crappy.

 

[Oleg P.]

Thanks Jeff.

Will the SDK open such option?

I think using REDline and then just back-sampling Bayer from the RGB is the result I’m looking for.
CineForm already did this:

http://techblog.cineform.com/?p=2397

…The output of the Red SDK provides traditional uncompressed RGB as computed by the Red DeBayer algorithm. Second, and this is important, a properly implementated DeBayer algorithm never changes the value of the actual pixel recorded at each cell site, it only calculates the missing values. This means that if you back-sample an RGB image to RAW (that was created by a DeBayer process) you are throwing away the computed values, but you retain the originally recorded pixel values (because the DeBayer algorithm did not alter them).

According the above I’ve assembled a REDline command:
--i 2k-ChartA-T3-1-12.R3D --format 1 --gammaCurve -1 --colorSpace 0 --NR 0 --detail 1 --drx 0.0

Is this line going to extract absolutely linear image?

Thanks.

 

[Nick Shaw]

According the above I’ve assembled a REDline command:
--i 2k-ChartA-T3-1-12.R3D --format 1 --gammaCurve -1 --colorSpace 0 --NR 0 --detail 1 --drx 0.0

Is this line going to extract absolutely linear image?

It won't produce the original sensor R, G and B values for those photosites, as the white balance matrix will alter them. Earlier versions of REDline had a --noMatrix option, which meant you could do what you are talking about, but that option is no longer available.

 

[Oleg P.]

Thanks Nick.

Do you have the version that has this option? (REDCINE-X Build 221 & REDLINE Build 194)
Can you please give me a link in PM?

Thank you in advance.

 

[paulherrin]

those old versions may not do you too much good with anything new. i would contact red about what you're trying to do. if it's cool, they'll probably be cool about it, right?