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On 2007-11-05 11:43:35, plankgatan wrote:
new firmware coming about 2 weeks...thank you
spook with
support some minutes ago.....
Thats good news. Thanks for the update.
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Posted: 2007-11-05 12:05:25
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On 2007-11-05 11:59:08, sadeghi85 wrote:
The most effective noise reduction algorithm for removing
salt and pepper noise(hardware fault) is
median filter. It's edge-preserving
median filter on Wikipedia
Look at this example from Wikipedia.org:
The upper right corner looks like a K850i photo while an N95 photo would be the lower left corner.
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Posted: 2007-11-05 12:19:16
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I highly recommend to apply median filter to noisy(arised from greater ISOs) pictures, using Photoshop. but don't present them here.
Look at these pictures:
"Original image"
"Image with added salt and pepper noise"
"Reconstructed image using median filter"
Salt and pepper noise on Wikipedia
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Posted: 2007-11-05 12:49:10
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On 2007-11-04 20:27:35, spikeyjac wrote:
Nice pic above!!What happens when you put a golf tee in a water fountain
I could never have taken pictures this good on my n95:
Has reduced the quality a little though uploading them here, as they were too wide
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xbox 360 gamertag- Jac720
Wow! Amazing clarity! I've NEVER been able to get something like this at night. What settings did you use?
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Posted: 2007-11-05 12:49:26
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On 2007-11-05 11:43:35, plankgatan wrote:
new firmware coming about 2 weeks...thank you
spook with
support some minutes ago.....
That's good news!
it's not only for SE service centre i hope!
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Posted: 2007-11-05 13:08:55
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A very good representation of noise reduction:
Noise reduction on Wikipedia
for those lazy ppl that hesitate to click the link, here is abstract:
"....Images taken with both digital cameras and conventional film cameras will pick up noise from a variety of sources. Many further uses of these images require that the noise will be (partially) removed - for aesthetic purposes as in artistic work or marketing, or for practical purposes such as computer vision. In salt and pepper noise (also known as random noise or independent noise), pixels in the image are vastly different in color from their surrounding pixels. The defining characteristic is that the color of a noisy pixel bears no relation to the color of surrounding pixels. Generally this type of noise will only affect a small number of image pixels. When viewed, the image contains dark and white dots, hence the term salt and pepper noise. Typical sources include flecks of dust on the lens or inside the camera, or with digital cameras, faulty CCD elements. A median filter is an example of a non-linear filter and, if properly designed, is very good at preserving image detail. To run a median filter: 1. consider each pixel in the image 2. sort the neighbouring pixels into order based upon their intensities 3. replace the original value of the pixel with the median value from the list This type of filter is very good at removing salt and pepper noise from an image, and also causes very little blurring of edges, and hence is often used in computer vision applications...."
[ This Message was edited by: sadeghi85 on 2007-11-05 13:04 ]
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Posted: 2007-11-05 13:49:37
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WooOoOW
Is that a lesson is physics or what?!
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Posted: 2007-11-05 14:47:29
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Posted: 2007-11-05 15:09:38
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ohh... an s700. God i loved that phone !!!
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Posted: 2007-11-05 15:13:14
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no it is not a physics lesson.
it is fact!
and yes sadeghi85.. i read that before and the techniqe is similar to what we have learnt on our DSP course in Uni.
and......
mamnoon aghaye sadeghi baraye ettelaate mofidi ke dadid. in ravesh yeki az ma'mul tarin va behtarin raveshha baraye hazfe noise hast.
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Posted: 2007-11-05 15:13:47
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