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Re: nokia 808 pure view camera

Advisor
mushroomng
Posts: 15
Accepted Solution

nokia 808 pure view camera

808 has oversampling camera... Deos that mean that the real sensor is just 8 megapixel?... But after capturing image... It digitally add pixel into it?
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Ex-Moderator (Retired)
Jampe
Posts: 832

Re: nokia 808 pure view camera

Hi mushroomng,

 

Please have a look at this article in Nokia Press providing everything you want to know about Pureview technology. 

 

Hope this answers your question!

 

Jampe

If the answer solves your issue, please click the ACCEPT AS SOLUTION button so other users can benefit from it as well. Giving a kudos (the white star) if my answer has helped will be appreciated.
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Advisor
mushroomng
Posts: 15

Re: nokia 808 pure view camera

thx.... By the way... how you type the word ' this article' with a link hidden behind that word?
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Mobile Overlord
farby
Posts: 19,154

Re: nokia 808 pure view camera

First Paste the link..then select the whole link and replace it with the word you want to ...

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Ex-Moderator (Retired)
Jampe
Posts: 832

Re: nokia 808 pure view camera

mushroomng,

 

Type the word you want to use as a hyperlink, then higlight the word and select insert/edit link (the chain icon). When the pop-up menu opens, paste or type in the link you want to use. Usually users want to stay on the forum page and the link to open in a new window, so you can choose Open in new window (_blank)

 

Jampe

If the answer solves your issue, please click the ACCEPT AS SOLUTION button so other users can benefit from it as well. Giving a kudos (the white star) if my answer has helped will be appreciated.
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Sage
Posts: 158

Re: nokia 808 pure view camera

at mushroomng

The correct term is NOT oversampling but DOWNSAMPLING.

 

The 808 captures at 41MPixels and scales down (using advanced anti-aliasing techniques) to a 5 or 8MPixels image. Hence removing sensor noise and artifacts.

Quite the difference. 

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Mobile Guru
rayhipkiss
Posts: 3,937

Re: nokia 808 pure view camera

  


Manu_T wrote:

at mushroomng

The correct term is NOT oversampling but DOWNSAMPLING.

 

The 808 captures at 41MPixels and scales down (using advanced anti-aliasing techniques) to a 5 or 8MPixels image. Hence removing sensor noise and artifacts.

Quite the difference. 


Did you read the White paper posted by Jampe? The article clearly states the 808 uses OVERSAMPLING which combines many pixels into one pixel to give a pure pixel.

 

Ray. 

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Advisor
perus
Posts: 17

Re: nokia 808 pure view camera

Must be a typo. From 41Mp to 8 or 5 is nothing else than downsampling. Marketing sometimes get it wrong. Oversampling is what most cheap webcams use to sell more pixels.

/Per
N8, N900@PR1.3, XT910 RazR
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Advisor
mushroomng
Posts: 15

Re: nokia 808 pure view camera

so.... Can i choose not to downsample it and make it remain 38mp for all images?
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Mobile Guru
rayhipkiss
Posts: 3,937

Re: nokia 808 pure view camera

  


perus wrote:
Must be a typo. From 41Mp to 8 or 5 is nothing else than downsampling. Marketing sometimes get it wrong. Oversampling is what most cheap webcams use to sell more pixels.

/Per

The term oversampling is being widely used around the internet when the 808 is being discussed, so I don't think it is a typo. Oversampling is a term in digital photography to describe taking a certain number of pixels and combining them into one pixel. With the 808 seven pixels are combined to create one "pure" pixel.

 

http://conversations.nokia.com/2012/02/27/nokia-808-pureview-–-revolutionary-camera-technology-great-smartphone/

 

Ray. 

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Mobile Guru
rayhipkiss
Posts: 3,937

Re: nokia 808 pure view camera

  


mushroomng wrote:
so.... Can i choose not to downsample it and make it remain 38mp for all images?

Yes, the 808 features a "creative shooting mode" to take shots in 38 MP mode which you can later crop or resize.

 

http://conversations.nokia.com/2012/02/27/nokia-808-pureview-–-revolutionary-camera-technology-great-smartphone/

 

Ray. 

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Sage
Posts: 158

Re: nokia 808 pure view camera


rayhipkiss wrote:

  


Manu_T wrote:

at mushroomng

The correct term is NOT oversampling but DOWNSAMPLING.

 

The 808 captures at 41MPixels and scales down (using advanced anti-aliasing techniques) to a 5 or 8MPixels image. Hence removing sensor noise and artifacts.

Quite the difference. 


Did you read the White paper posted by Jampe? The article clearly states the 808 uses OVERSAMPLING which combines many pixels into one pixel to give a pure pixel.

 

Ray. 


 

I don't read documents that are plain wrong! Or use the wrong terminology as it undermines the credibility of the poster/writer.

 

The term "oversampling" is used in signal audio processing NOT in photography.

 

In Image processing the correct term IS Downscaling (AKA Downsampling). E.g. scaling a 1600x1200 pixel image down to 800x600pixels (in this example case combining 2 pixels into 1 pixel). The opposite is UPSCALING (AKA upsampling), thus making a smaller image larger (AKA pixel doubling). This is what an iPad does when it 'upscales' iPhone-apps to its larger screen.

 

Pureview takes an 38MPixel image and SCALES it DOWN to 8Mpixels or 5Mpixels.

 

Regards.

 


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Mobile Guru
rayhipkiss
Posts: 3,937

Re: nokia 808 pure view camera

@ Manu_T

 

 I think your missing the point of the term "oversampling" entirely. The authors of that Whitepaper have used the term to describe the method or technique the 808 uses to create its "pure" pixels. Each pure pixel is created by combining up to 7 pixels into one pure pixel. So, each pure pixel is an oversampled pixel.

 

 If you still insist that the authors are wrong to use that term, then you should take it up with them and not us.

 

All the best.

 

Ray. 

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Mobile Guru
93tid
Posts: 3,221

Re: nokia 808 pure view camera

 

Upsampling is not the same as oversampling. Oversampling in audio signal processing means sampling a signal with a higher frequency, main reason being in order to achieve cheaper higher-resolution A/D and D/Aconversion. Basicially this means taking more samples of the sound being recorded in order to be able to reproduce it better, reduce noise, etc., etc. even when downsampled, mainly to reduce the file size and bit rate. This is more or less what Pureview does - it uses 7 pixels to capture an image instead of 1, i.e. it uses "overpixelling" if you wish, by shooting at 41MP in order to achieve better quality say 5MP pictures compared to 5MP photos shot at 5MP.

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New Member
Kolondrum
Posts: 4

Re: nokia 808 pure view camera

Hello! It is difficult in English, sorry.
The 3-week pureview appliances "HOT PIXEL" sick. What is the position of the defect nokia? Roof over the migratory defect, roof blue pixel error >> example: http://www.kephost.com/images4/2012/12/10/a1_2012_12_10_4s832566jj.jpg
..

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