| Author |
Super camera driver for k750/w800/w810 |
radicalgel
Joined: Oct 06, 2006
Posts: 98
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@sarmad
I know what you mean mate but there are a few simple reasons why you would want a Jcomp closest to 100%.
1) Lower number of artifacts. This you will notice more on night shots and shots of the sky.
2) If you decide to take prints of your photos the higher the comp the better.
3) JPEGs are already a highly compressed format which in turn is a compromise on quality so why would wanna further deteriorate the quality...
4) You can make out the difference between 2 very well taken shots, one at 88% and one at 95% Jcomp. You may need an lcd monitor to notice it though. I have a 20.1" widescreen and the clarity difference is pretty noticeable.
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http://www.flickr.com/photos/radicalgel/ |
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pakraider
Joined: Jul 25, 2003
Posts: 313
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On 2007-06-17 05:01:42, radicalgel wrote:
4) You can make out the difference between 2 very well taken shots, one at 88% and one at 95% Jcomp. You may need an lcd monitor to notice it though. I have a 20.1" widescreen and the clarity difference is pretty noticeable.
ok cool, i'll take your word for it.. my laptop screen isnt good enough to see the difference, hehe. this gives me something else to work on, so i guess there will be a 5.8 driver after all...
has anyone had any problems with the higher comp settings.. like any stability issues?
[ This Message was edited by: sarmadgilani on 2007-06-17 05:30 ] |
SPU
Joined: Feb 07, 2007
Posts: 131
From: Russia, SPb
PM |
sarmadgilani
Really you can get a crash even on 80% if it will be locked... but you can't lock it, you can set upper limit only.
To avoid crashes you need to know how the jpeg encoder works with settings you provide in driver.
W800i CID36 R1BD001 |
pakraider
Joined: Jul 25, 2003
Posts: 313
PM |
On 2007-06-17 07:23:32, SPU wrote:
sarmadgilani
Really you can get a crash even on 80% if it will be locked... but you can't lock it, you can set upper limit only.
To avoid crashes you need to know how the jpeg encoder works with settings you provide in driver.
right, all we can do is set an upper limit since its dynamic and not set to one compression value every time.. interesting, i'll have to look into this more, i just wish i had the time to sit down and test all this out... although my guess would be the trick lies in determining the right parameters for the min, max, and avg values for the SET_JPEG macros.. although it would have to be dynamic, so needs a bit of testing.. which is horrible on the W810 since it takes several minutes just to upload and test a driver... 
[ This Message was edited by: sarmadgilani on 2007-06-17 06:48 ] |
sowbran
Joined: Jun 11, 2006
Posts: 158
From: Mexico
PM |
On 2007-06-17 06:28:38, sarmadgilani wrote:
On 2007-06-17 05:01:42, radicalgel wrote:
4) You can make out the difference between 2 very well taken shots, one at 88% and one at 95% Jcomp. You may need an lcd monitor to notice it though. I have a 20.1" widescreen and the clarity difference is pretty noticeable.
ok cool, i'll take your word for it.. my laptop screen isnt good enough to see the difference, hehe. this gives me something else to work on, so i guess there will be a 5.8 driver after all...
has anyone had any problems with the higher comp settings.. like any stability issues?
[ This Message was edited by: sarmadgilani on 2007-06-17 05:30 ]
No for me is good take pics with higher quality PD. if u can in u next driver increase the color level thanks so much and greetings see ya later |
radicalgel
Joined: Oct 06, 2006
Posts: 98
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@SPU
Hey ive been testing your 1.3b4 and the indoor shots are great now. When I take outdoor shots in bright sunlight my pics are really grainy and full of noise when I lock AE, set ISO to 100 & adjust shutter speed where as the shots are really good when I lock AE, set ISO to max (1600 i think) and then set shutter to auto (1.0). Is this normal? Just asked cause theoretically ISO adjusts the image sensor's sensivity to light so higher the ISO, higher the brightness and higher the noise in the image. This theory holds good for indoor shot but not for outdoor shot. Any thoughts. Both pics taken with WB set to daylight.
AE lock, ISO = 100, manual shutter: Heavy Noise
AE lock, ISO = 2.3, manual shutter = 1.0, saturation = 4.0: Rich Clear Pic (over saturated because I set the level at max)
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[ This Message was edited by: radicalgel on 2007-06-17 07:53 ]
[ This Message was edited by: radicalgel on 2007-06-17 07:54 ]
[ This Message was edited by: radicalgel on 2007-06-17 07:58 ] |
SPU
Joined: Feb 07, 2007
Posts: 131
From: Russia, SPb
PM |
radicalgel
Something strage... What about EXIF information? Seems like AE lock is off. Btw, very bright scenes can have a heavy noise (on dark picture parts) even on ISO 100. But this is not your case.
W800i CID36 R1BD001 |
Raiderski
Joined: Jul 03, 2006
Posts: > 500
From: Poland, Hell, Mountains
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right, all we can do is set an upper limit since its dynamic and not set to one compression value every time.. interesting
well, something what i was talking about some time ago...
SPU can you please point what is the aim for encoder?
1. to keep the output file sizes constant
2. to achieve biggest possible defined in driver compression %
3. encoder can recognize that there is not need to use high compression % if image content is low detail and will produce small file size
this is very important from image content point of view. if point 3 isn't fulfilled that's bad. low detail images near 550kb/95% - no thanks...
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ziupo
Joined: Apr 14, 2007
Posts: 74
PM |
Sarmadgiliani - I think about special version 5.7 witch VIVID and sharpness set to 4 in default 
Sarmadgiliani can you modify your driver to my proposition? |
kukuh
Joined: Jul 15, 2006
Posts: 53
From: Indonesia
PM |
relax friend!
enjoy my pictures
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SPU
Joined: Feb 07, 2007
Posts: 131
From: Russia, SPb
PM |
Raiderski
1. You can't get a constant file size. We can talk only about average size.
2. If you are talking about the "classic" way (like in original SE driver), you can get crashes on qualities above 75%. But this depends on other settings like maximum file size.
3. That is the "classic" way. Quality has an approximatelly low upper limit.
Let
SQ - starting (initial) quality
IQ - intermediate (average) quality
EQ - end quality
CQ - current quality
MINS - minimum file size
MAXS - maximum file size
AVGS - average file size
RS - resulting file size.
1. First of all encoder sets CQ=SQ and makes a jpeg.
2a. If MINS<=RS<=MAXS then all done (no futher work)
2b. if not, it goes to the jpeg_qtable_factors table and calculate the next value: X=RS/jpeg_qtable_factors[CQ]
3. After that it looks in the jpeg_qtable_factors for such index INDX that the value X*the jpeg_qtable_factors[INDX] is closest to the AVGS, but greater then MINS, and less then MAXS (and INDX must be less than EQ (or more than EQ if EQ<SQ))
4. Now encoder sets CQ=INDX and finally makes a resulting jpeg.
Note that:
1. X*the jpeg_qtable_factors[INDX] is just an approximation of resulting size and RS easily can be greater than MAXS.
2. such INDX may be not exist.
Conclusion: you still must think a lot about the params to avoid crashes or strange behaviour.
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W800i CID36 R1BC002
[ This Message was edited by: SPU on 2007-06-17 14:06 ] |
F-Lexx
Joined: May 09, 2007
Posts: 163
From: Romania
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what driver did you use and what settings? And what phone do you have? |
Raiderski
Joined: Jul 03, 2006
Posts: > 500
From: Poland, Hell, Mountains
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@SPU
thx. ofcourse i wrongly use "constant" word because i wrote this in rush and i couldn't fit proper word, something like "files size on comparable level" bla bla 
@kukuh
2nd pic is nice but do i see noise remove software work? if yes then i don't get it. why not to show pic as it is in original form? if not then apologies for the suspicion
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smw0130
Joined: May 14, 2007
Posts: 8
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Sarmad Driver
Macro Off
Macro On
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mirage_bgnow
Joined: Apr 01, 2007
Posts: 56
PM |
Sarmad 5.7 Spot support:
It was at picnic today... |
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Posted: 2007-06-17 05:01
800i CID36 R1BC002
