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#1
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"sparklies" in digital image
Can anyone please help me to identify what is going on with my Casio Exilim
s20U images? Here's a sample: http://home.earthlink.net/~tfkerin/sample.jpg I didn't notice this out of the box (just a few weeks ago), but in dark areas of the images, I am getting white speckles. They're only noticeable in dark areas or dark photos, and they are not always in the same place (so I assume they're not dust). Sometimes they appear to be in areas where I can spot no pattern, whereas other times the sparklies tend to follow the outlines or contours of an object. It happens with different SD cards. Does anybody recognize this type of defect? Or have an idea for the fix? It's nothing beyond what Photoshop's despeckle filter can fix, but I hate to have to deal with it -- this doesn;t look normal to me, but maybe somebody here has seen something like this. Any clues would be appreciated. Thanks! |
#3
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In article et,
says... Can anyone please help me to identify what is going on with my Casio Exilim s20U images? Here's a sample: http://home.earthlink.net/~tfkerin/sample.jpg I didn't notice this out of the box (just a few weeks ago), but in dark areas of the images, I am getting white speckles. They're only noticeable in dark areas or dark photos, and they are not always in the same place (so I assume they're not dust). Sometimes they appear to be in areas where I can spot no pattern, whereas other times the sparklies tend to follow the outlines or contours of an object. It happens with different SD cards. Does anybody recognize this type of defect? Or have an idea for the fix? It's nothing beyond what Photoshop's despeckle filter can fix, but I hate to have to deal with it -- this doesn;t look normal to me, but maybe somebody here has seen something like this. Any clues would be appreciated. Thanks! Since you didn't provide exposure info Im going to go out on a limb and GUESS.. It was a long exposure, so I would say its caused by a few hot pixels, though Ive not known that problem to be random, Im sure different pixels will act differently on different exposure length. One thing Im fairly certain sure of, its NOT the memory card. -- Larry Lynch Mystic, Ct. |
#4
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Thanks, Larry. The camera was set in all the automatic modes -- what they
call "snapshot", with auto flash, auto ISO, auto white balance, no EV shift, quality "fine". It's hard to say more, since everything was in auto mode, but you're probably right that the problem images may tend to be long exposures. But, I have also seen this effect in flash pictures at short range (which I'm guessing shouldn't take a long exposure) -- the white speckles appear in the darker areas surrounding or behind the subject in the forground,....like in this second sample: http://home.earthlink.net/~tfkerin/sample-2.jpg I hadn't heard of "hot pixels" causing this effect -- very interesting, although it's odd how the speckles follow a pattern around objects. After I posted, I called Casio tech support, which suggested that I send the camera in for repair. But the guy didn't really have a theory about the cause, so I'm still interested in what you or anyone has to say. Thanks again. |
#5
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Thanks, Larry. The camera was set in all the automatic modes -- what they
call "snapshot", with auto flash, auto ISO, auto white balance, no EV shift, quality "fine". It's hard to say more, since everything was in auto mode, but you're probably right that the problem images may tend to be long exposures. But, I have also seen this effect in flash pictures at short range (which I'm guessing shouldn't take a long exposure) -- the white speckles appear in the darker areas surrounding or behind the subject in the forground,....like in this second sample: http://home.earthlink.net/~tfkerin/sample-2.jpg I hadn't heard of "hot pixels" causing this effect -- very interesting, although it's odd how the speckles follow a pattern around objects. After I posted, I called Casio tech support, which suggested that I send the camera in for repair. But the guy didn't really have a theory about the cause, so I'm still interested in what you or anyone has to say. Thanks again. |
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#7
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"Ted Kerin" wrote in message nk.net... Can anyone please help me to identify what is going on with my Casio Exilim s20U images? Here's a sample: http://home.earthlink.net/~tfkerin/sample.jpg It looks like noise. It will probably go away if you increase the exposure. Jim |
#8
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"Ted Kerin" wrote in message ink.net... Thanks, Larry. The camera was set in all the automatic modes -- what they call "snapshot", with auto flash, auto ISO, auto white balance, no EV shift, quality "fine". It's hard to say more, since everything was in auto mode, but you're probably right that the problem images may tend to be long exposures. But, I have also seen this effect in flash pictures at short range (which I'm guessing shouldn't take a long exposure) -- the white speckles appear in the darker areas surrounding or behind the subject in the forground,....like in this second sample: http://home.earthlink.net/~tfkerin/sample-2.jpg I hadn't heard of "hot pixels" causing this effect -- very interesting, although it's odd how the speckles follow a pattern around objects. After I posted, I called Casio tech support, which suggested that I send the camera in for repair. But the guy didn't really have a theory about the cause, so I'm still interested in what you or anyone has to say. Thanks again. Dust in the air often causes white spots in flash photos. All I see in the firts picture is some blue lines to the left; they are unlike anything I've seen. All I see in the seocnd is a small spot above and slightly to the left of the boy's head. It could be something on the wall back there. Am I looking in the wrong places? |
#9
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"Ted Kerin" wrote in message ink.net... Thanks, Larry. The camera was set in all the automatic modes -- what they call "snapshot", with auto flash, auto ISO, auto white balance, no EV shift, quality "fine". It's hard to say more, since everything was in auto mode, but you're probably right that the problem images may tend to be long exposures. But, I have also seen this effect in flash pictures at short range (which I'm guessing shouldn't take a long exposure) -- the white speckles appear in the darker areas surrounding or behind the subject in the forground,....like in this second sample: http://home.earthlink.net/~tfkerin/sample-2.jpg I hadn't heard of "hot pixels" causing this effect -- very interesting, although it's odd how the speckles follow a pattern around objects. After I posted, I called Casio tech support, which suggested that I send the camera in for repair. But the guy didn't really have a theory about the cause, so I'm still interested in what you or anyone has to say. Thanks again. Dust in the air often causes white spots in flash photos. All I see in the firts picture is some blue lines to the left; they are unlike anything I've seen. All I see in the seocnd is a small spot above and slightly to the left of the boy's head. It could be something on the wall back there. Am I looking in the wrong places? |
#10
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Ted Kerin wrote:
Can anyone please help me to identify what is going on with my Casio Exilim s20U images? The only things I spot with either image are clearly highlights or reflections from the subjects. Perhaps you could post shots with arrows identifying the spots that interest you? |
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