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post pictures taken with your: sony ericsson K850 |
ccsharry
Joined: Dec 06, 2007
Posts: 22
From: uk
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I'm not comparing it to my DSLR at all... How about if I compare it to my 5 years old Canon S45, a 4 Mega Pixel Camera. If a photo taken by this Canon score 8, K850i only scores 2 due to the compression artifacts!!
All I am asking is why the compression rate so high?!! It should not be a hardware issue and this is why I am asking!! I do understand the glass/size of sensor is not as good as many digital camera, but these are not the reason to caused the compression artifacts!! Why can't SE just reduce the compression rate? |
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ccsharry
Joined: Dec 06, 2007
Posts: 22
From: uk
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On 2008-01-12 12:38:38, sadeghi85 wrote:
On 2008-01-12 10:59:16, ccsharry wrote:
Don't you think the compression artifact is really bad? You never see clear sharp image since the artifact is everywhere... well, I'm a DSLR user so my expectation is high, but I'm disappointed with the so called 5 Mega Pixel. I think somehow they manage to fake a lower pixel sensor by masking the pixels with artifacts caused by the high compression rate...
I think this isn't effect of high compression rate. in the EXIF data i can see that ISO is set to 320! for such a tiny sensor even ISO125 is too much.
read my post and AbuBasim's reply to it.
and i think you should resize that pic and link to the full size.
Thanks for the explaination. Appreciated it a lot!! |
AbuBasim
Joined: Nov 04, 2005
Posts: > 500
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On 2008-01-12 10:59:16, ccsharry wrote:
Don't you think the compression artifact is really bad? You never see clear sharp image since the artifact is everywhere... well, I'm a DSLR user so my expectation is high, but I'm disappointed with the so called 5 Mega Pixel. I think somehow they manage to fake a lower pixel sensor by masking the pixels with artifacts caused by the high compression rate... [snip!]
It's a genuine Sony 5MP IMX020 CMOS sensor in the K850i. The problem with this type of sensor is the sensitivity. It's about a third of the sensitivity in a CCD sensor of similar size (compare Sony's 5 MP ICX495 CCD sensor specs here with the specs of the K850i's sensor here , and while you're at it compare also with the IMX018 sensor used in the K790/K800/K810 phones here and notice the higher sensitivity in the IMX018 sensor due to the larger pixel size). Poor sensitivity means more noise.
Having said that, no one with their brains still intact would be buying a CMOS camera phone and expect dSLR-quality shots from it. Most camera phones are more than adequate if you're satisfied with 4x6 prints from the photos.
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[ This Message was edited by: AbuBasim on 2008-01-12 12:16 ] |
Raiderski
Joined: Jul 03, 2006
Posts: > 500
From: Poland, Hell, Mountains
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ccsharry
man, why you're trying to compare cameraphone with digital camera?
K850: CMOS 1/2.8"
Canon S45: CCD 1/1.8"
Canon has overall better and bigger sensor. 4MP instead of 5MP - pixel size on sensor is bigger which equals better quality. Canon also has much better Digital Signal Processor
any more comments are necessary?
BTW. if you must know, your picture has this quality: 94% (chroma) and 91% (luma). if this is bad compression then i don't understand you at all
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[ This Message was edited by: Raiderski on 2008-01-12 12:34 ] |
ccsharry
Joined: Dec 06, 2007
Posts: 22
From: uk
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AbuBasim
Thanks for the thorough explaination!! Now I understand the reasons behind...
So, the number of pixel would not tell the quality of a camera fully...
Raiderski
Well, I did not understand the sensitivity of the sensor until AbuBasim explained above. But if you are an average customer, wouldn't you expect them to compare both 5MP cameras?! As concluded from above, may be there should be a new standard to compare the quality of cameras instead of the number of pixels...
Btw, how did you calculate the chroma and luma percentage?
Thanks for the replies!! |
Raiderski
Joined: Jul 03, 2006
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From: Poland, Hell, Mountains
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ccsharry
yeah, all this hunting for more and more MP is funny (first quantity then quality) but i don't care about this. after all 5MP is better than 3MP in cameraphones  i don't need superb quality, i always have my 2MP cameraphone with me and quick access to make shots - that's enough
use any EXIF reader for this kind of informations. i'm using JpegSnoop
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ccsharry
Joined: Dec 06, 2007
Posts: 22
From: uk
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Raiderski
Indeed, a lower pixel camera could have better quality!! Somehow I still find my 5 yrs old Canon S45 very competitive comparing to the newest cameras in the market. of course i'm talking about the pure image quality.
I owned both the w800i and k800i. They are great phones!! But may be K850i couldn't surprise me as much and I am disappointed somehow...
The image quality of K850i is brilliant considering how small it is! It's definitely extremely convenient. It has already replaced my discrete mp3 player and camera!! |
number1
Joined: Sep 12, 2007
Posts: > 500
From: UK,kent,Sittingbourne
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it's simple why the k850i takes such horrible pics
read here http://www.6mpixel.org/en/
then scroll down to the sensor sizes so the k850i has a 1/2,8″”
this site recommends maxuim 2.7mp for a 1/2,5″” sensor size, so thats about a maxuim of 3mp for a 1/2,8″”, anything over that results in grainy horrible pics like the k850i it's not compression it's cramming to many megapixels in to such a small cheap sensor.
[ This Message was edited by: number1 on 2008-01-12 14:45 ] |
fullforce
Joined: Oct 12, 2005
Posts: > 500
From: Sweden
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I thought this was at thread for/about posting pics from K850?....
I don't get this one- it says "liter" on the bottle..yes and then what? Does that mean it can only contain liter and not, for instance, pints, gallons etc?? 
Oh look somebody have dropped their gigantic menthos! Maybe it belongs to the green giant?
[ This Message was edited by: fullforce on 2008-01-12 15:35 ] |
DarKMaGiCiaN
Joined: Aug 25, 2006
Posts: > 500
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On 2008-01-12 15:43:26, number1 wrote:
it's simple why the k850i takes such horrible pics
read here http://www.6mpixel.org/en/
then scroll down to the sensor sizes so the k850i has a 1/2,8″”
this site recommends maxuim 2.7mp for a 1/2,5″” sensor size, so thats about a maxuim of 3mp for a 1/2,8″”, anything over that results in grainy horrible pics like the k850i it's not compression it's cramming to many megapixels in to such a small cheap sensor.
[ This Message was edited by: number1 on 2008-01-12 14:45 ]
I thought that was the reason untill I used my frinds sony digital camera
it is 4MP and has 2.8 sensor !!!!!! good pic quality
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number1
Joined: Sep 12, 2007
Posts: > 500
From: UK,kent,Sittingbourne
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of corse it does it's digital camera, it propely has a very expensive ccd sensor and not a cheap crappy cmos 1. |
-PERFECT-
Joined: Dec 29, 2007
Posts: 461
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By pperfectt, shot with K850i at 2008-01-12
[ This Message was edited by: -PERFECT- on 2008-01-12 17:30 ]
[ This Message was edited by: -PERFECT- on 2008-01-12 17:32 ]
[ This Message was edited by: -PERFECT- on 2008-01-12 18:06 ]
[ This Message was edited by: -PERFECT- on 2008-01-12 18:15 ] |
tai020381
Joined: Dec 07, 2004
Posts: > 500
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Guys guys, stop quarrelling and make peace...... Give you guys a brief summmary on where k850i stands compared with other cameraphones (Viewty, N82) I think you should be very glad that you bought the k850i!!~`
http://www.sogi.com.tw/park/content.asp?a_id=6891
Scroll down to see pages 2 and 3 for comparison of the 3 phones...
Overall I think the k850i did pretty well and I think this comparison is just ^^ |
EddieAdams
Joined: Nov 12, 2007
Posts: 251
From: L.I., New York
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On 2008-01-12 12:43:12, ccsharry wrote:
I'm not comparing it to my DSLR at all... How about if I compare it to my 5 years old Canon S45, a 4 Mega Pixel Camera. If a photo taken by this Canon score 8, K850i only scores 2 due to the compression artifacts!!
Yes, but can your Canon S45 make a phone call? 
Hello, Exactly!-Eddie Adams a.k.a. Dirk Diggler a.k.a. Brock Landers. Boogie Nights. |
AbuBasim
Joined: Nov 04, 2005
Posts: > 500
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On 2008-01-12 18:11:52, EddieAdams wrote:
Yes, but can your Canon S45 make a phone call?
Buy the Canon Digital Rebel XCP and you'll have the best of both worlds...
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Posted: 2008-01-12 12:43
