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-   -   camera-ui2 (now a part of CSSU) (updated 09. May) (https://talk.maemo.org/showthread.php?t=70870)

nkirk 2012-01-08 05:13

Re: camera-ui2 (now a part of CSSU) (updated 09. May)
 
I also face the same scenario where the view finder is very dark when the camera app is opened , but its easily fixable by changing only the ev values once. maybe at start-up Cam-UI might be ignoring the reported correct EV values by the driver or whtevr.

Also changing of ISO and EV values at the same time never worked for me (resulted in too dark or none responsive ISO /EV settings which forced me to restart the cam UI), but behaved as expected if you change only one of the parameters from the either.

nkirk

strange1712 2012-01-08 05:25

Re: camera-ui2 (now a part of CSSU) (updated 09. May)
 
Quote:

Originally Posted by nkirk (Post 1147334)
I also face the same scenario where the view finder is very dark when the camera app is opened , but its easily fixable by changing only the ev values once. maybe at start-up Cam-UI might be ignoring the reported correct EV values by the driver or whtevr.

Also changing of ISO and EV values at the same time never worked for me (resulted in too dark or none responsive ISO /EV settings which forced me to restart the cam UI), but behaved as expected if you change only one of the parameters from the either.

nkirk

I guess we are talking about this "at the same time" scenario... It's not really useful if you can fix one of this parameters and you can't set the other, as for example, if you want to take a picture on lower light but still want to get a good grade of details you should set ISO to a low value (100/200), and Exposure to a higher value (I really prefer Fcam for this, though), which can be somewhat achieved setting higher EV... and you have to be patient and non-shaking hands, or a tripod or somewhere to fix the cam... On the other side, you may wish to get the best of an even lower light scenery and set high ISO and High EV...

tecs 2012-01-08 08:54

Re: camera-ui2 (now a part of CSSU) (updated 09. May)
 
I can confirm this bug occuring on manual ISO and + exposure. The only way to restore viewfinder was to switch to automatic ISO or select a - or 0 exposure setting then tap the viewfinder (or open any menu or dialog that fades the background and go back to the viewfinder).

nicolai 2012-01-08 10:44

Re: camera-ui2 (now a part of CSSU) (updated 09. May)
 
Quote:

Originally Posted by tecs (Post 1147359)
I can confirm this bug occuring on manual ISO and + exposure. The only way to restore viewfinder was to switch to automatic ISO or select a - or 0 exposure setting then tap the viewfinder (or open any menu or dialog that fades the background and go back to the viewfinder).


This is an old known bug 10384.

I tried to solve this bug for my own camera-ui, but I
had to realize it must be a bug in the underlaying
camera-driver. There was no way to feed the
camera-api with just the "right" values. Every
combination of iso-value and ev-correction leads to
this black preview.
But of course, it is a won't fix and no information about
how we could fix this.

Pondake 2012-01-08 11:03

Re: camera-ui2 (now a part of CSSU) (updated 09. May)
 
Just great, why wasn't this mentioned in the first post?

How can I rewind this?

marmistrz 2012-01-08 12:14

Re: camera-ui2 (now a part of CSSU) (updated 09. May)
 
Suggestions:
raw and png format as output
make video capture less stuttering (sometimes happens)

geohsia 2012-01-08 13:48

Re: camera-ui2 (now a part of CSSU) (updated 09. May)
 
Quote:

Originally Posted by nicolai (Post 1147233)
What tone curve?

Sorry I meant the dark portion of the histogram. Have you not seen the same with regard to RAW and N900 JPGs?

nicolai 2012-01-08 15:27

Re: camera-ui2 (now a part of CSSU) (updated 09. May)
 
1 Attachment(s)
@geohsia @Estel

Can you test this version. I removed the black-level values in
the dng file. This isn't right, but it seems to be responsible for
the bad raw data for lower light images.

geohsia 2012-01-08 15:32

Re: camera-ui2 (now a part of CSSU) (updated 09. May)
 
Quote:

Originally Posted by nicolai (Post 1147463)
@geohsia @Estel

Can you test this version. I removed the black-level values in
the dng file. This isn't right, but it seems to be responsible for
the bad raw data for lower light images.

Hi Nicolai. I tried to update (save and clicked on the file) and it says "Unable to update camera-ui Incompatible application package."

BTW, I believe the technical term to be "crushed blacks". This is more common in the video world.

don_falcone 2012-01-08 15:38

Re: camera-ui2 (now a part of CSSU) (updated 09. May)
 
Someone told that in this case you'll have go the dpkg route, as HAM won't install packages that don't sit in 'user' category.


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