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Old Mar 1, 2006, 1:17 PM   #11
NHL
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I got one right here: (white spot above the last pier in the blue sky)





Everything around that white spot is blue - adjacent pixel in an RGB is usually not the same color so it's all in the demosaic function probably and like danielg said it's not a dead pixel either because it normally doesn't show up on other images! - May be it's just a twinkling star... :evil:

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Old Mar 1, 2006, 2:07 PM   #12
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You can map it out.

I haven't done it yet myself. But, I think you can map 'em out in PS (interpolate values from adjacent pixels).

I think it supports dark frame subtraction, too (if you wan to take a lens cap on exposure right after the main one so only hot pixels will shot up, if Custom Function 2 turned on doesn't work well enough (or someone's got a plugin that would do it).

I knoiw David Coffin's dcraw.c supports a bad pixel map for raw conversion.

It's got a text file it looks for with this information, with optional parameters for pixel date.

That way, if you're processing raw files before a pixel starting getting stuck (always hot) or dead (reading too low) at the exposure times you typically use, it only maps out the ones that were bad on or before the date you say they went bad in the file.

So, you don't map out any more than necessary if you are converting or reconverting old raw files with it.




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Old Mar 1, 2006, 7:48 PM   #13
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JimC

There were no details as it was a lens cap shot.



NHL,

What camera are you using? What iso and exposure value were used for that shot sir? thanks
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Old Mar 1, 2006, 7:56 PM   #14
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danielg wrote:
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There were no details as it was a lens cap shot.
I prefer to take my photos with the cap off. ;-)


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Old Mar 1, 2006, 11:25 PM   #15
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JimC wrote:
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danielg wrote:
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There were no details as it was a lens cap shot.
I prefer to take my photos with the cap off. ;-)

I know sir, the reason I had the cap on was to test fro hot pixels
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