Question about Fuji FinePix S2 Pro Digital Camera

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"Stuck" Pixel Hello folks I bought a used S2 from a friend and recently started noticing this green hot pixel that shows up at the same location in most of the shots. These are not long exposures. They're available light shots inside my house, so they average 1/45 @ f4 ISO 400. I'm starting with digital and this really sucks, because it is showing up in most pictures. These are snapshots of my family and I don't want to have to fix each of them in post production. I would like to hear from members if they have sent their camera to Fuji or authorized dealers(in New York) and what has their experience been like. I want to know how much it can cost and if the mapping and elimination process is effective. Any other insights or suggestions that may help are very welcome. Thanks.

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Re: "Stuck" Pixel

I just read in a photo magazine that if you had a stuck pixel, you should leave the cap on the lens and shoot several frames as quickly as you can.

Posted on Sep 12, 2005

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Re: "Stuck" Pixel

If it is a stuck pixel, then you can simply create an image with an alpha channel/selection in it that selection that pixel and create an action that loads that image, loads the selection from that image into the current image, runs Dust & Scratches within the selection. There is a bit more to it than that, but that is how you deal with an aging sensor and its stuck pixels. This should be done on a per channel basis. And in the end, you run this on every image you take (add it to your workflow) and then forget about it. hope this helps,

Posted on Sep 12, 2005

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Re: "Stuck" Pixel

It could be the dust on the sensor. Read the manual and try to clean the sensor to see what happens

Posted on Sep 12, 2005

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I have a Nikon coolpix 5700. Recently have taken a bunch of pictures that ended up having pink spots show up on the pictures. It does not matter what setting the camera is on or how the zoom is set it...


Your CCD sensor most likely has what is referred to as a "dead pixel" or "stuck pixel", which is a pixel in the sensor that is not functioning properly anymore. There is not much to do to get it fixed. If you have an image editing program such as photoshop, corel draw or gimp, it is very simple to clone or heal the pixel out.

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It is not unusual for a camera's sensor to have a pixel fail this way. Most sensors consist of 100's of thousands or more pixels that make up the sensor. Each responds to the color and intensity of the light projected upon it by the lens. It sounds like a pixel on your sensor has failed and is "dead" or "stuck" in a dark state. Pixels can fail "hot" on a single color, too.

The bad news is that it is not possible to fix a stuck pixel. The sensor itself is the smallest replaceable part and is often times not worth the expense of replacing. Compare costs of replacing the part vs the cost of replacing the camera and decide which way to go to be sure.

I did see some Minolta specific info that you might want to look at first here.

The good news is that there is software that will allow you to mask the pixel. Google search for "stuck pixel software" for a list of results. The software analyzes the pixels around the non-functioning pixel, and makes it a color that is far less likely to be noticed. Other software may perform functions that restore functionality to the pixel and others still that do something else. I am unsure of how well the former methods work or how long they might work. Software that changes the output file is the type I used and it seemed to work well. Each file needed to be run thru the software to make the change however.

Good luck!

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Recently I found one balck spot on my picture, I dont know whay the black spot is coming. I am having a Nikkon D90 18-105 lens.


The black spot can be from one or two sources. The first, is a called a stuck or hot pixel. Your camera's sensor has 12.9 million pixels (12.3 million are used for the image). Many times, a hot or stuck pixel is a bright color - red, yellow, green, etc. It can be any color however. Dark or black pixels can also be called dead pixels as they look like they're "off." Regardless of which your camera suffers, it will not respond to light projected on the sensor by the lens. You'll have to have manually edit the pixel in each image, or return to Nikon for sensor replacement. Nikon used to perform a mapping out of the pixel, but it seems that they don't do this any longer. A sensor replacement can cost in the hundreds of dollars.

The second source, is dust on the sensor. A pixel(s) blocked by dust will show up in each picture, but will appear to be more in focus in some images than others - depending on the aperture value of the camera when the exposure was made. A stuck pixel usually has a very definite edge on all images regardless of aperture setting. A simple, careful wet cleaning of the sensor with a product designed specifically for the job can solve this problem pretty quickly.

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If by saying the upper right corner of the lens you really mean that there is a dark spot on each image AND the rear display, there may be dirt or dust on the lens itself. Clean the lens with an optical quality cleaner. Do not use paper towels and Windex or the like - as paper towels can scratch the lens.

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If the dark spot is on the rear display only, it can also be a result of a "stuck pixel" on the display itself. This should not show up an images, but only on the display. There is little that can be done outside of replacing the entire rear screen.

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The problem you are encountering is called a "dead pixel". Every ccd has several dead pixel, so it is quite normal. But I agree that it can be annoying.
The solution is to map the bad pixel and to substract them afterhands.
Go to http://chdk.wikia.com/wiki/Main_Page and download the latest firmware for you camera here http://mighty-hoernsche.de/.
It is a supplement to your camera that will open hundreds of possibilities, like making time-lapse recordings, doing your own scripts, shooting RAW,...as well as a feature for removing bad pixels.
All you have to do is to read! Yeah, I know, there are lots of things written :p
More specifically, here is the "how to use badpixel removal" explanation.
http://chdk.wikia.com/wiki/Badpixel_removal


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