Levels Correction

[EpheMeroN]

Can anyone provide me with proper levels correction for this? My monitor's colors/brightness/contrast are so screwed up (monitor is 8 years old) I have no way of doing this until I get a new monitor. Thanks!

http://img135.exs.cx/img135/4628/106bw.th.png (http://img135.exs.cx/my.php?loc=img135&image=106bw.png)

[scharfis_brain]

Can one translate this into:
"I am just too lazy to do the levelling myself" ?!?

anyway.

- open that video in VDub.
- add the levels filter
- enable the preview.
- set the gamma to 5.0
- adjust the black-level slider until the first pure-black pixels show up
- set gamma to 0.050
- ajust the white level slide until the first white pixels are passed through
- set the gamma to a value around 1.0 (+/- 0.2)

that's it.

[rfmmars]

Your spining your wheels unless you have a analog calabrated monitor to look at the black & white levels. The above post is best way if you don't have the second monitor.

richard
photorecall.net

[trolltuning]

I used the method scharfis_brain gave on a clip I have. The VirtualDub filter reads:
0.0-0.83>1.00>0.00-1.00 RGB
How do I rewrite that for the levels filter in avisynth?(I thought I needed intergers except for the gamma?

[scharfis_brain]

How do I rewrite that for the levels filter in avisynth?

just read from left to right / from top to bottom in the configuration dialogue.

ie:

--------------+-----+-------+-----+
Input Levels :| 35 | 1.105 | 225 |
--------------+-----+-------+-----+
Output Levels:| 0 | | 255 |
--------------+-----+-------+-----+

translates to

levels(35,1.105,225,0,255)


so if I may ask: I this procedure really THAT difficult?!?
I ever thought it was obvious, how the values are meant...

[trolltuning]

@scharfis_brain
Thanks. Now that you've told me its's obvious:)
It just never occurred to me that the values came from the box not the line that I posted.