Hot answers tagged dead-pixel
It is called a stuck pixel, because it seems to be stuck all the way on in every image. To be more precise, it a red pixel that seems to be stuck all the way on. When the camera or RAW convertor program converts the information from the sensor, the high value of that one pixel is also causing the surrounding pixels to have artificially high red values ...
Adobe Lightroom (I know, broken record) has a tool to spot clean. Once you define the area, you can apply it to all photos in a collection. As Mister Shaw has commented on, some camera's have dust delete capabilities, which may work. Also, have you considered (out-of) warranty repair on your body?
This is completely normal. Unlike many makers, though, Olympus includes the hot-pixel mapping function on all their cameras, so you can just use that. Remember, a full resolution JPEG from this camera has 15,925,248 pixels. If, say, a dozen of them are defective, that will have a 0.000075% impact on your final results. It's really a non-issue, and not ...
Try to clean the sensor, it may be that there are some dust particles sitting directly on it, creating parasitic capacitances near the pixel or blocking light and that is handled incorrectly in subsequent image conversion steps.
Most consumer digital cameras nowadays do automatic dark frame subtraction, which should hide any stuck pixels. (Actually, just plain subtraction would only make the pixel black instead of red, but pretty much all decent dark frame correction algorithms also detect stuck pixels and interpolate over them.) In fact, the automatic dark frame subtraction is ...
Many raw converters have tools to map your hot pixels and then automatically remove them, but I don't know details. E.g., Pixie for Bibble. I'm sure there's equivalents for other software too.
Adobe Camera Raw removes them from raw files automatically. I would assume Lightroom does also as it's basically the same thing. I do not know if this works on jpegs.
Its pretty easy in Photoshop, all you need to do is use the retouch or clone tool. You could even do this with the free paint.net Just select the clone stamp tool, hit the right ctrl key to select an adjacent region you want to clone on to the area, and then clone away.
I found a solution that worked on my 550D (Rebel X2i), the page is about the 5D Mk2 so I guess it works on all canons. http://www.slashgear.com/how-to-remove-stuck-pixel-on-your-digital-slr-2227392/ The relevant part: Test for dead pixels : Left lens-cap on, set camera to exposure 30 seconds black-out image at varies ISO settings. Fix for ...
Maybe some sort of sensor dust/dirt or a dead pixel on the sensor. If it is dust or dirt on the sensor, have it cleaned up by professional (or do it yourself) If they are dead pixels, then your camera should have a feature called "pixel mapping" that should help (AFAIK) with removing those dead pixels. (check your camera manual).
Generally I would say yes - if a component is going to fail due to manufacturing deficiencies, it will often do so in the first day/week/month if use (depending on usage of course) What you describe (depending on the number of defective pixels) sounds like it is degrading with use - if it is effecting image quality, I would call it a "DOA", so should be ...
A quick look around on The Googles seems to confirm that Apple Aperture doesn't have an automated way to deal with hot pixels. In any case, I think the best way is to have the hot pixels mapped out in-camera at the RAW level. Some cameras can do this as a menu option, but unfortunately some manufacturers save this as a price-differentiation feature and ...
Some cameras have a menu option for pixel mapping, which runs an internal check for stuck-on pixels and maps them out (even from RAW files). This is the best and most convenient way to avoid this problem, since you basically don't ever have to worry about it again. Unfortunately, it appears that neither Nikon nor Canon make this feature user-accessible. ...
the first time I noticed hot pixels in my camera (an old Olympus 3000Z) was in a night sky shot. I never tested for the presence of dead pixels, but I assume it also has some too. dead and hot pixels are present in all pictures my camera takes, and now that I know where they are, they are the first thing I see in some of my pictures. I think that, in ...
Taken from this answer to my question about purple spots, if you're working with RAW files, Pixel Fixer can purportedly fix them up.
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