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02/11/2004 12:46:52 AM · #1 |
Is anyone here using any software utilities for removing hot pixels from digital photographs? Is there a Photoshop plugin that will do this?
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02/11/2004 12:59:11 AM · #2 |
you can use the clone tool in photoshop to get rid of hot pixels, or you can try the scratch and dust removal tool
James |
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02/11/2004 09:05:02 AM · #3 |
There's a method I read about once, where you take a picture in the dark, then you bring it into PhotoShop (or alternatives), you make it a negative image, and somehow you use this as a mask to filter out the noise. There's probably a plugin you can get that will do this through this or similar processes.
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02/11/2004 09:31:47 AM · #4 |
Originally posted by orussell:
There's a method I read about once, where you take a picture in the dark, then you bring it into PhotoShop (or alternatives), you make it a negative image, and somehow you use this as a mask to filter out the noise. There's probably a plugin you can get that will do this through this or similar processes. |
This "dark frame picture/mask" method sounds like it would work. I did a search on "hot pixels" on the Internet last night before I asked this question, and found several software utilities that would do the same sort of thing. My question was specifically supposed to mean "which utility would you recommend?" I'm leery about downloading software for which I know nothing about its reputation.
Cloning the pixels out would also work, but it appears that my camera has developed many hot pixels across the entire frame (really bad at F11/3 secs). Coincidental considering I just received the camera back from Fuji for dust cleaning.
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02/11/2004 09:52:50 AM · #5 |
ummm... not sure if all the hot pixels you say you have are hot pixels..
do some test shots at all f stops and varying shutter speeds with the lens cap on and off, when the lens cap is off use a white background and a lot of light so you get an even white background.
hot pixels will be white, blue or red, black spots will be dust or gunk on your lens.
Also I remember reading some cameras (maybe only 1 brand of camera)have a pixel remaping tool or something like that where you reset them or something like that....
James
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02/11/2004 10:40:48 AM · #6 |
Originally posted by jab119:
ummm... not sure if all the hot pixels you say you have are hot pixels..
do some test shots at all f stops and varying shutter speeds with the lens cap on and off, when the lens cap is off use a white background and a lot of light so you get an even white background.
hot pixels will be white, blue or red, black spots will be dust or gunk on your lens.
Also I remember reading some cameras (maybe only 1 brand of camera)have a pixel remaping tool or something like that where you reset them or something like that....
James |
The pixels that are appearing in my low light photo (F5.0-11 at 3 secs) are red blue and green. The background in the photo is dark dark blue almost black.
I think I read that Nikon provides a pixel remapping tool, but not entirely certain about that. I saw no mention of Fuji in the article I was reading.
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02/11/2004 11:11:02 AM · #7 |
Originally posted by jab119:
Also I remember reading some cameras (maybe only 1 brand of camera)have a pixel remaping tool or something like that where you reset them or something like that... |
The manufacturer typically has the ability to map certain pixels (at least on higher-end cameras) as "dead" so that no data for that cell is recorded, and instead the sensor locations around the hot pixel are averaged to compute a value for the missing pixel. This is not usually something that can be done by the end-user as far as I know.
Message edited by author 2004-02-11 12:24:53. |
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02/11/2004 11:33:15 AM · #8 |
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02/11/2004 02:39:26 PM · #9 |
Originally posted by mcrael:
The pixels that are appearing in my low light photo (F5.0-11 at 3 secs) are red blue and green. The background in the photo is dark dark blue almost black. |
That sounds more like noise than bad sensors. How many are there? |
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02/11/2004 03:11:24 PM · #10 |
You may be looking for something like this:
Quantum Mechanics |
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