CP4500 has a RAW mode!

Started Jan 21, 2003 | Discussions thread
Ed Rotberg Senior Member • Posts: 1,865
Re: White surface?

Alex,

I have not yet tried any of the versions. Does version 4 have separate buttons for mapping dead pixels and hot pixels? If not, and you don't have the camera pointing at the correct stuff, I could see where it might cause problems.

If there are separate functions for mapping hot pixels vs. dead pixels, then I would be interested in trying the hot pixel remapping as I can feel at ease leaving the lens cap on.

BTW, these are all marked for Windows 2000 or Windows XP. Do you know if they will owrk on Windows 98?? Not a big problem for me as my PC at the office is Windows 2K, but I'd prefer to run this at home on my 98 machine.

= Ed =

= Ed =

AlexMld wrote:
Have you tried the version 4? the 995 support should be improved
there though I am not sure it is tested with it. The versions
starting from 3 are supporting "dead" (dark) pixels mapping as well
as "hot" (bright) pixels mapping. Paul69 is writing that it is not
clear yet how to use the dead pixel mapping. Theoretically for this
purpose the camera should be presented with evenly illuminated
white surface for example a white ceiling. I think the most
important is to get the even illumination of the surface and also
the surface probably should be out of focus so the small
inregularities of it wouldn't count as dead pixels. I suppose for
hot pixel mapping the camera should be presented with black (closed
cap) but I think it does automatically close the shutter just like
it does when performing NR in 4500 (black frame reduction).

Alex

MariusN wrote:
Alex,

What should be in front of the lens during those calibration/bad
pixel remapping shots?

Would be ok to have the lens cap on or do we have to put some sort
of white surface in fornt of the lens, in good and uniform light?

I am just testing out the 3 versions of the Paul's program with my
995. Is curious that none of them could read any bad pixel from the
camera, is like there are is no bad pixel map on my 995. Bad pixel
mapping was done on this camera in the past and right now there are
several stuck pixels on the CCD, clearly visible as hot (bright
pink, green, bluem I have all colors..) at 1/4 sec shutter speed,
even at 1/60 sec (ISO 100, etc).

Does Paul have any chance to test this program with another
Coolpix? Anyone else here willing to give it a test shot, just to
see if is reading the bad pixels with other Coolpix models trhan
2500 that Paul has?

Thanks,
Marius

AlexMld wrote:

To make the camera to recalculate the table you
need to press Remap. The camera starts doing some shots etc for
about 10 sec - this is OK.

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= Ed Rotberg =

'A waist is a terrible thing to mind'

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