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maemo.org - Talk (https://talk.maemo.org/index.php)
-   Nokia N900 (https://talk.maemo.org/forumdisplay.php?f=44)
-   -   FCAM thing in a nutshell for non-developers... (https://talk.maemo.org/showthread.php?t=58910)

Bundyo 2010-07-24 12:33
Re: FCAM thing in a nutshell for non-developers...
 
Quote:
Originally Posted by stickymick (Post 763052)
I'm finding my images are coming out excessively grainy. I'm not saying there's anything wrong with fCamera or the API, it's more than likely the way I'm using it. Not done any serious tinkering with photography for years.

The potential for close ups is phenomenal, as these two images show:

http://img.photobucket.com/albums/v4...100723_005.jpg
Image with N900 default cam.

http://img.photobucket.com/albums/v4...3_18595136.jpg
Image with fCamera.

Both images were taken at a distance of around 5cm from the subject.

Anyone have any ideas?
The graininess comes with the low light conditions. Try with more light (day)

Milhouse 2010-07-24 13:24
Re: FCAM thing in a nutshell for non-developers...
 
Quote:
Originally Posted by Crugath (Post 762548)
1.4MB image http://www.the-buccaneer.co.uk/image...1279914739.jpg Nice looking thistle in our garden, it's at least 6ft tall!!
Nice bokeh. :)

Milhouse 2010-07-24 13:31
Re: FCAM thing in a nutshell for non-developers...
 
Quote:
Originally Posted by abadams (Post 762796)
We're not doing anything magic in software. Our post-processing pipeline is fairly simple and standard (it has to be to run fast on the device). No idea why the built-in camera app doesn't look better. Next on the todo list is to calibrate for the vignetting, so you don't get that slight color shift at the corners.
Presumably FCam is using only the ARM core for it's processing, which may explain why processing such as hrdcapture and lowlight can place quite a load on the processor and consume considerable battery... is there any scope (or even plans?) to use some of the other hardware on the N900 SoC such as IVA2, DSP etc that may improve performance? And is FCam taking advantage of the NEON multimedia extensions?

It's early days I know but just wondering how the processing performance may be improved in future as some of it is quite intensive! :)

ossipena 2010-07-24 13:35
Re: FCAM thing in a nutshell for non-developers...
 
Quote:
Originally Posted by fms (Post 763131)
Nice explanation. Does not take into account the fact that most real-life shots are not made on macro.
well, it is presumed that oneself knows how many macro pictures he takes and how many other pictures..

of course outside macro everything else goes like the bigger the sensor the better.

ossipena 2010-07-24 13:39
Re: FCAM thing in a nutshell for non-developers...
 
Quote:
Originally Posted by debernardis (Post 763134)
I have tried to open the dng images with some linux applications from ubuntu repositories.
Ufraw crashes on any dmg.
Rawstudio shows a blurred, red image of something and can't convert it in anything useful with any button or control.

Can you suggest me the right tool? Thanks :)

EDIT: no image tool on ubuntu repos could open those files. Neither gimp, which outputs some interesting messages:

/home/debernardis/Immagini/photo2010.06.24_15.00.19.10.dng: Can not read TIFF directory count

/home/debernardis/Immagini/photo2010.06.24_15.00.19.10.dng: Failed to read directory at offset 0

before stating that the rawphoto plugin can't open the image.
try with adobes products

http://www.adobe.com/products/dng/

debernardis 2010-07-24 14:02
Re: FCAM thing in a nutshell for non-developers...
 
Quote:
Originally Posted by ossipena (Post 763234)
try with adobes products

http://www.adobe.com/products/dng/

Unfortunately I wasn't able to install Adobe Photoshop Lightroom 3 with Wine on my ubuntu box - and believe me or not I have no windows machine. Trying with a virtualized xp...

fraz 2010-07-24 14:13
Re: FCAM thing in a nutshell for non-developers...
 
As they mentioned above dcraw (on which many opensource and some comervial RAW converters are based) can't open the DNG files.
http://www.cybercom.net/~dcoffin/dcraw/

Seems like a great program though! Keenly awaiting new releases.
Can we have an option to keep the vignetting and other optical artifacts if anyone ever tried to process them out?
They are quite a novelty :D

Flandry 2010-07-24 14:26
Re: FCAM thing in a nutshell for non-developers...
 
Quote:
Originally Posted by ossipena (Post 763234)
try with adobes products

http://www.adobe.com/products/dng/
Does anyone else think it's kinda silly that this amazing open source, collaborative industry/academic, revolutionary camera project that was first released on a linux phone only supports a raw format that proprietary ($@%#) Adobe windows software can handle?

debernardis 2010-07-24 14:33
Re: FCAM thing in a nutshell for non-developers...
 
OK, I guess now that the problem in decoding the dng images might stem by the fact that I'm using the drivers that Titan uploaded on his site, which are from the 1.0.5-1 version, while they have been updated by the fcam developers to the 1.0.5-2 because of a bug.

So, please, someone with the newest 1.0.5-2 version (i.e. not using Titan's kernel) can check if the dng files can be opened by ufraw or rawstudio on ubuntu? Thanks :)

attila77 2010-07-24 15:31
Re: FCAM thing in a nutshell for non-developers...
 
Quote:
Originally Posted by ossipena (Post 763226)
of course outside macro everything else goes like the bigger the sensor the better.
On the other end of the range, you're back to small sensors again - tele is much easier with small(er-pixeled) sensors. Obviously, since the lens on the N900 is not interchangeable that application area is rather limited (unless, you have a microstage and a silly urge to mount the N900 at the end of a telescope and point it at the moon or critters in the back yard). I look very much forward to playing with fcamera in my astro-hacks. Just sayin'.


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