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Nikon Hacker • View topic - Dark Current Enable Tool

Dark Current Enable Tool

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Re: Dark Current Enable Tool

Postby Mdieterich » Sat Mar 28, 2015 8:09 am

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Re: Dark Current Enable Tool

Postby astronomer » Sat Mar 28, 2015 1:30 pm

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Re: Dark Current Enable Tool

Postby Mdieterich » Sun Mar 29, 2015 10:26 am

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Re: Dark Current Enable Tool

Postby astronomer » Mon Mar 30, 2015 1:10 pm

It seems the column noise is just column fixed pattern bias. A simple bias subtraction will completely eliminate the column noise.

I'm thinking about trading a menu setting to enable the dark current mode. And the menu structure code looks similar across model.
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Re: Dark Current Enable Tool

Postby Mdieterich » Wed Apr 01, 2015 1:39 pm

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Re: Dark Current Enable Tool

Postby Francois » Fri Apr 03, 2015 9:46 pm

Hi astronomer

Thank you for our conversations last time when I found that the Expeed applies a certain scaling factor to sensor informations before subtracting it and producing a final NEF. :grin:
However, theres are still some phenomena which are difficult for me to understand; final NEFs of D700, D800, and even D4s all have a clipping at the lowest end of the histogram.
If the offsets in D700 and D800 were subtracted in advance of NEF recording, we would not see a clipping at the centre of the Normal distribution, or the lowest end of final NEFs of D700 and D800.
In the case of final NEF of D4s as well as hacked ones of D700 and D800 by your software, a clipping is found at 0 ADU level, meaning its offset may be insufficiently high to record all the fluctuations of readout noise.
I would be very happy if you could provide me with something.
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Re: Dark Current Enable Tool

Postby astronomer » Sun Apr 05, 2015 10:29 pm

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Menu based Hack

Postby astronomer » Mon Apr 06, 2015 10:07 pm

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Re: Dark Current Enable Tool

Postby whwang » Tue Apr 07, 2015 3:33 pm

That looks great. Can we expect such menu based hack available for D800 some time in the future?
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Re: Dark Current Enable Tool

Postby Mdieterich » Wed Apr 08, 2015 7:13 am

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