|
|||||||||
|
Thread Tools | Search this Thread |
December 22nd, 2004, 02:59 PM | #1 |
Regular Crew
Join Date: Oct 2004
Location: Wellington, New Zealand
Posts: 77
|
Cine settings?
What is the Color Matrix option really doing when it is set to "Cine"?
Is this applying a log curve to the chroma and/or hue response in the same way that setting the gamma to "Cine" changes luminance from linear to log? Or is it something else? Thanks. |
December 23rd, 2004, 04:43 AM | #2 |
RED Code Chef
Join Date: Oct 2001
Location: Holland
Posts: 12,514
|
Did you check page 68 of the (NTSC) manual:
Chapter: Using the Custom Preset Paragraph: Gamma Curve If you have the PAL manual look up that chapter.
__________________
Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge | Lady X Search DVinfo.net for quick answers | Buy from the best: DVinfo.net sponsors |
December 23rd, 2004, 05:19 AM | #3 |
Wrangler
Join Date: May 2003
Location: Eagle River, AK
Posts: 4,100
|
Yeah, that graph is just "representational" and doesn't give specific values; not sure exactly what is being changed and by how much between NORMAL and CINE in the Color Matrix setting. Just looking at the graph, it appears to pull the curve a bit toward, but not all the way to, linear. (The second graph below it with the straight lines looks to be just for knee and black, not the CINE modes.)
Poorly documented. I doubt if the specific details are published -- it might require doing sample shots of a color chart in both modes and analyzing them to really understand what is being done to the color matrix. I don't have the time or talent for this particular issue but I do hope someone does.
__________________
Pete Bauer The most beautiful thing we can experience is the mysterious. It is the source of all true art and science. Albert Einstein Trying to solve a DV mystery? You may find the answer behind the SEARCH function ... or be able to join a discussion already in progress! |
December 23rd, 2004, 06:14 AM | #4 |
Regular Crew
Join Date: Oct 2004
Location: Wellington, New Zealand
Posts: 77
|
Of course I read the manual.
I can not detect any appreciable difference between CINE and NORMAL for the Color Matrix. Furthermore the docs are talking about the gamma settings with that chart - not the Color Matrix. It is a wonder as to what it actually is. |
March 7th, 2005, 02:34 PM | #5 |
Regular Crew
Join Date: Apr 2004
Location: Athens, Ohio
Posts: 40
|
I am begining to suspect that no one really knows what Color Matrix does beyond the vague description in the manual. I can't generally detect a difference, but I suspect it may be a result of my other settings making this one undetectable.
__________________
Tom Koerner |
March 12th, 2005, 05:02 AM | #6 |
RED Code Chef
Join Date: Oct 2001
Location: Holland
Posts: 12,514
|
The best way perhaps to get to the bottom of what it does is hook
the camera up to something that can display vector scopes and histograms in real-time (preferably for each color channel separately!) Then it can be seen what happens to the signal more clearly. It could also be done in a similar way in post, but requires much more (paper) work. If I had an XL2 I'd be willing to try it, but santa hasn't brought me one yet <g>
__________________
Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge | Lady X Search DVinfo.net for quick answers | Buy from the best: DVinfo.net sponsors |
| ||||||
|
Thread Tools | Search this Thread |
|