News Forum Phone database

> New Topic
> Reply
< Esato Forum Index > Sony Ericsson / Sony > Symbian phones > Anyone ever captured photos of more than 1mb in size with the P990 cam? Bookmark topic

I'm not too sure that is in reality a JPEG stream but more like a RAW stream?? The buffer is dependant on the JPEG compression(Normal and Fine) which is software based and which is being tweaked in the cam drivers, which are nothing but the interfacing values between the DSP and the OS.

I seriosly doubt the camera would capture the image in JPEG format intitally, its like when you record music you generally record it without compression as in wav.

But, I'm basing my assumptions around how a DSLR works, so maybe I'm wrong, but my gut feeling is that the image is first saved in some sort of compression less format otherwise tweaking the compression in cam drivers would'nt have been possible. And if my memory serves me right one of hte more experienced cam driver modder was able to overrun the buffer without a driver crash by recoding it in i2c.

And you do know that the DSP is software right? The K750/790 and the P990 do not use any specific chipset for DSP and most of it is software controlled


_________________
Regards,

Akshay
http://www.flickr.com/photos/akshaydashrath/

[ This Message was edited by: aksd on 2008-03-31 19:51 ]
--
Posted: 2008-03-31 20:50:06
Edit : Quote




Of course the camera will capture in RAW and then applies compression. funny ican get 900kb+ from K550!
--
Posted: 2008-03-31 21:25:53
Edit : Quote


Even on my p1i I get like 800-900kb for 3.2mp, on fine setting.
--
Posted: 2008-04-01 18:25:54
Edit : Quote


Perhaps P990 has low compression from RAW since the photos are just 2mp max but the size is bigger or about the same with a 3.2mp phone, at least on mine. Why the low compression, or is mine faulty since I've yet to hear from other P990 owners with similar issue
--
Posted: 2008-04-02 02:43:19
Edit : Quote


Is it normal on my P1i that I have taken pictures set on 3.2mp and on 'fine' quality and the file size was 414kb?
--
Posted: 2008-04-03 03:09:21
Edit : Quote


I guess it depends on what you're taking a picture of in terms of pixel variation/detailed textures, the more there are - the bigger the file.

I also think the compression ratio has been improved as the biggest file from my P1 is around 500KB, whereas some from previous Pphones have been at least double that at lower rez.

BTW - I use the same quality settings as you, so I think you're pics are entirely normal (though I haven't seen them of course ).

[ This Message was edited by: AD on 2008-04-03 10:17 ]
--
Posted: 2008-04-03 11:11:47
Edit : Quote


the acutal compression settings & file sizes are in the driver i pushed my k800i so i at least get a 800kb photo but anything over 910kb and it crashes because it's limited by what the cammodule can handle.
--
Posted: 2008-04-03 11:19:23
Edit : Quote


So am I thinking of it the wrong way round? Have they skimped on compression quality due to an increase in resolution?

What I think I'm trying to ask is, as in photoshop when you save an image as .jpg theres a slider control for image quality, the higher you set it - the larger the resulting jpeg file, yet the resolution remains constant. So based on this idea, could it be that SE reduced the quality image wise in the compression settings of the P1 to compensate for the increase in resolution? Hence you get bigger files from the lower resolution module in the P990?

Make sence?
--
Posted: 2008-04-03 11:33:04
Edit : Quote


@AD
Interesting theory, that could explain how bigger megpixeled cams would perform bigger compression. But I noticed that K850 photo size is generally around 1.2mb in size, and the quality isn't something we can shout about. What's up with that?
--
Posted: 2008-04-03 15:58:41
Edit : Quote


Well, following my theory that would be just due to the camera module itself not being up to the job, and the jpeg compression routine being set to its highest quality setting to try to get the most out of it.

Odd though, as the k850's selling point is the camera.....
--
Posted: 2008-04-03 17:53:21
Edit : Quote

---

New Topic   Reply

Forum Index