video lift

13:26 Dec 1, 2012
This question was closed without grading. Reason: Answer found elsewhere

English to Dutch translations [PRO]
Tech/Engineering - Photography/Imaging (& Graphic Arts) / bewakingscamera
English term or phrase: video lift
In de gebruiksaanwijzing van een bewakingscamera komen onder 'camera-instellingen' (onder meer) de kopjes 'video gain' en 'video lift' voor.
'Video gain' schijnt te staan voor 'videoversterking'
[ camerashop.nl/index.php?action=extra&extra=A_bewakingscamera_s&lang=NL ]

Ik heb geen benul wat 'video lift' is.

Wat extra tekst:

"
VIDEO GAIN
Video gain can be set from 0 to 7db to compensate for losses in long cable runs. Default setting is 2.

TECH SUPPORT COMMENT: It is recommended to use video lift first before adding gain as this will
usually give better results.


VIDEO LIFT
High frequency video lift can be set between 0 & 8. Default is zero.


TECH SUPPORT COMMENT: Technician should attempt to compensate for poor cable runs using video lift, before using video gain.

"

Veel dank!
sindy cremer


Summary of answers provided
3videolift
Robert Rietvelt
Summary of reference entries provided
Ron Willems

Discussion entries: 11





  

Answers


22 mins   confidence: Answerer confidence 3/5Answerer confidence 3/5
videolift


Explanation:
Een hefmechanisme voor de camera, en als dat ding op wieltjes staat, wordt het een "dolly" genoemd (bij grotere camera's).

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Note added at 43 mins (2012-12-01 14:09:49 GMT)
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Ik kom op een apparaat uit dat je aan het plafond monteert, zodat je de camerastand in hoogte kunt verstellen (zie http://www.elcheapo.nl/overige_beamer/eurex/video_lift/)

Robert Rietvelt
Local time: 23:31
Specializes in field
Native speaker of: Native in DutchDutch

Peer comments on this answer (and responses from the answerer)
neutral  Ron Willems: nee, dit lijkt me een signaalfunctie en geen fysieke lift (vgl. 'gain')
6 mins
  -> Misschien wel, misschien niet (zie mijn note)

neutral  Tijmen Roozenboom (X): maar het is een camera-instelling
12 mins
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Reference comments


28 mins
Reference

Reference information:
De gebruikelijke term voor 'lift' is 'offset': alle pixels worden een (identiek) beetje helderder gemaakt. Mooi uiteengezet door ene Phil Rhodes:


Offset (sometimes termed lift) is an additive function; it simply adds a fixed amount to all the brightness values of the image. You will notice that when you increase offset, the entire waveform display slides up and down without changing shape. You can do the same thing in curves by moving the two ends of the initial straight line towards the top left, so the bottom end slides straight up and the top end moves left. Offset is most obvious in the shadows.
...
Gain is a multiplicative function; it multiplies the values of the image by a given amount. This is like moving the top right end of a straight-line curve left, so the entire image gets brighter. Gain is similar, though not identical due to nonlinearity, to opening the iris. Gain is most apparent in the highlights.
http://www.cinematography.com/index.php?showtopic=56265


Voor meer refs kun je verder googelen op "video gain and offset".

Een vertaling heb ik niet kunnen vinden, maar mijn voorkeur zou zijn om 'offset' te laten staan (evt. 'de offsetfunctie', al naar gelang).

Ron Willems
Netherlands
Works in field
Native speaker of: Native in DutchDutch
PRO pts in category: 40
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