[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: High speed Tesla spark photographs
Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>
Hi Dan,
At 07:46 AM 9/16/2006, you wrote:
Terry,
A "dark" frame will only remove non-random noise such as hot pixels.
That is a big problem in my case. The old CCD sensor has significant
hot pixels and the "fixed" noise floor has risen over time. This
camera does not have a built in function to remove that. The
software fix really cleans up super dark photos well.
To
remove random noise generated by the sensor itself, you basically would need
to take multiple exposures of an identical object (such as stars for
example) and then average those frames to remove random noise.
The software just does a 2nd order low pass function which is
surprisingly good at this type of noise. It has a lot of various
filters but this one does fine. It does chew up the good image just
a little but not bad.
Of course,
our arc is not a constant image, so you cannot do that.
Dan
It should be good enough right now. I will just have to see what happens.
Cheers,
Terry