In-line gamma adjuster
Posted 07 January 2008 - 09:04 AM
This device is in line with what I'm thinking, but with the wrong kind (but still useable) input/outputs. Ideally you'd have a knob for adjusting it.
Do any of you more video-savvy pros know of any device like this? Google hasn't been fruitful. - j
Posted 09 January 2008 - 04:51 PM
He does low-volume, niche production and thinks this would be up his alley.
I've asked to reproduce his email (along with my query) here, which I will when I get his permission. - j
Posted 09 January 2008 - 06:15 PM
I have no problem if you post my response in the groups. If you are interested I can have a prototype ready in a few weeks.
Jay Scheuerle wrote:
Would you mind if I publish your response in my user groups (both at Cloudynights.com and the Yahoo Mallincam group)? I really have no idea how many people are using these cameras, but theyâ€™re starting to really take off.
- Jay Scheuerle
From: Kim Beumer
Reply-To: Kim Beumer
Date: Wed, 09 Jan 2008 15:17:45 -0600 (CST)
To: Jay Scheuerle
Subject: Re: RTC2200
From a technical point a view creating a gamma correction on a S-Video signal is relatively easy since it is already luminance/chrominance seperated and and I can make a converter for you that can do this.
I have no idea about the field that you are working in and I was wondering how many more people would be interested in this. Crescendo Systems really only makes low volume niche products so this would fit me really well too.
Jay Scheuerle wrote:
Iâ€™m not a video professional, but Iâ€™m hoping that this product may be able to suit my (and others needs) in the assisted visual astronomy sector.
There are some extremely low-light astro-video cameras (Mallincam/Stellacam) that allow us to see very faint objects by integrating frames of varying time-length and then outputting them as an NTSC signal via composite or S-Video to a monitor. Usually, the brightness and contrast knobs are used to display the best possible picture, but I think that type of fiddling could be better pulled off with an in-line gamma adjuster, so that the monitor can be left in a calibrated state.
Would it be possible (with some sort of converters I assume) to use your product in this fashion, or do you have any recommendations as to how we can adjust the gamma within an S-video or composite chain?
Thanks for any info you can provide. - Jay Scheuerle
Posted 09 January 2008 - 10:41 PM
Posted 10 January 2008 - 11:45 AM
My requests included:
This product would be used outdoors and would benefit from being easily adjustable, perhaps with gloves on.
Preferably, no external power source would be needed. A small, long-lasting battery (like a lithium cell) would be better than needing AC.
Since much of this stuff is moved, smaller is better.
Hereâ€™s two ways that Iâ€™m picturing it: