goldberg@oasys.dt.navy.mil (Mark Goldberg) (06/04/91)
From: goldberg@oasys.dt.navy.mil (Mark Goldberg) I am working on a project in real-time video imaging. I would like to touch base, via e-mail or phone, with those having expertise ion any of the following areas: - Low-light level TV or computer imaging - Use of real-time imaging to make photometric measurements (that is, quantify the actual brightness of a scene) - Video imaging research and technology - Helicopter mounts for cameras Plese contact me by e-mail at the address below, or call me during the day at (301) 267-2352. Many thanks in advance. -- David Taylor Research Center (a US Navy lab) - Annapolis, MD goldberg@oasys.dt.navy.mil
goldberg@oasys.dt.navy.mil (Mark Goldberg) (06/04/91)
I am working on a project in real-time video imaging. I would like
to touch base, via e-mail or phone, with those having expertise ion
any of the following areas:
- Low-light level TV or computer imaging
- Use of real-time imaging to make photometric measurements
(that is, quantify the actual brightness of a scene)
- Video imaging research and technology
- Helicopter mounts for cameras
Plese contact me by e-mail at the address below, or call me during the
day at (301) 267-2352. Many thanks in advance.
=========David Taylor Research Center (a US Navy lab) - Annapolis, MD==========
/|/| /||)|/ /~_/\| |\|)[~|)/~_ | "Everyone's entitled to MY opinion."
/ | |/~||\|\ \_/\/|_|/|)[_|\\_/ | goldberg@oasys.dt.navy.mil
"Poor is the man whose pleasure depends on the permission of another."-Madonnalhdowney@eos.ncsu.edu (Lewis Henry Downey) (06/11/91)
Don't know if this is useful to you, but I have considerable experience using trational panchromatic b/w films in low/light (almost no-light) situations. The resulting expertise is based on techniques of modified film development and film pre-exposure (as per Ansel Adams recommendations in THE NEGATIVE. (and obviously on coreections for reciprocity)The technical considerations are based as much as possible on determining the relative luminance range of the subject. However, I do not have a light meter sensitive enough to get reflected reading off of deep shadow areas and am forced to rely on many year (and 10's or 100's of hours of logged exposure time) to make certain decisions. A good rule of thumb is that it is extremely difficult to overexpose panchromatic film in super low-light situations. Whether any of this info is applicable to your needs is difficult to say. Basically, I usually try to create a film density of about .1-.13 in the area that is intended to be printed black. This allows areas that are slightly lighter to move up thetoe of the film curve enough to gain more tangible detail. Of course, each individual situation is accessed on its particular specifics as well as my subjective intentions for the reproduction. Recent explorations are leading in the direction of post-exposing the film. Will be glad to offer any information that is useful to you. The hardest thing about working at night is focusing. Warmly, Lewis Downey lhdowney@eos.ncsu.edu Photgraphy Instructor Meredith College Art Dept. 3800 Hillsborough St. Raleigh, NC 27607 919 833-4490 (home with answering machine)