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oliver_p
October 19, 2007, 18:20:19
Hello TIS support team,

I'm using my DMK21AF04.AS for a while and wonder about one thing:
What driver gamma setting does deliver a linear camera response ("Gamma=1", linear curve). I use the gamma slider at "10" = leftmost value in IC Capture.AS and the response seems to be close to linear. What's the real "flat" value ?

Thanks & best regards,.
Oliver

Stefan Geissler
October 22, 2007, 09:32:46
Hi Oliver,

Gamma = 10 is in the camera 1.0. This is the most linear.

oliver_p
October 22, 2007, 09:46:53
Hi Stefan,

thanks for your quick response! 10=linear was also my impression :)

Best regards,
Oliver

Sean McDaniel
November 10, 2007, 02:33:24
I found the spec, 100 is gamma=1. Most of the folks I talk with imaging Mars are using a gamma setting of 0 with their firewire cameras. What is the equivalent of 0 for the USB cameras? The scales don't seem to match.

Thanks,
Sean

Stefan Geissler
November 12, 2007, 12:42:54
Hi,

First of all, FireWire has not Gamma value 0.

The FireWire Gamma value is in 10 ... 24. Following formulas are used for calculation:
FireWire:
Gamma = n/10

USB
Gamma = n / 100

Sean McDaniel
November 12, 2007, 15:30:57
Thanks for clearing this up Stephan.