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 Forum index » House Training » HOWTO ( Solutions )
View dark images
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Lobster
Official Crustacean


Joined: 04 May 2005
Posts: 15117
Location: Paradox Realm

PostPosted: Wed 04 Jan 2006, 05:48    Post subject:  View dark images  

When taking pics indoors for gkam they come out black (no flash) and I have to edit them in GIMP

You can resize your black images in ROX using the magnyfying glass
and then dragging a black image will reveal a negative (but lightened) image underneath to give you an idea of what you are working with



This is useful and it might be worth further exploration . . .

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Flash
Official Dog Handler


Joined: 04 May 2005
Posts: 11157
Location: Arizona USA

PostPosted: Wed 04 Jan 2006, 10:39    Post subject:  

Those pictures should be correctly exposed if the camera is working correctly. It shouldn't matter that they are indoors without a flash. Perhaps there is something wrong with the camera's automatic exposure control or the manual exposure controls (shutter speed, aperture, effective ASA) are set wrong.
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Nathan F


Joined: 08 Jun 2005
Posts: 1760
Location: Wadsworth, OH (occasionally home)

PostPosted: Wed 04 Jan 2006, 13:57    Post subject:  

Flash-
I depends a lot on the camera whether it is actually capable of getting a proper exposure under these conditions. Even if it did, the picture may not be sharp because of the longer exposure time needed.

Most consumer grade cameras, whether they are digital or film based, have a hard time under these circumstances. They just don't have a lense with a wide enough diaphragm to let in the amount of light required. This is WHY we have builtin flashes on all of these cameras.

Nathan
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Lobster
Official Crustacean


Joined: 04 May 2005
Posts: 15117
Location: Paradox Realm

PostPosted: Wed 04 Jan 2006, 14:03    Post subject:  

My camera is little more than a toy - not so good Sad
Phones now have better cameras

I just found out that highlighting all the files show all of them in negative . . . (viewable)

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Last edited by Lobster on Thu 05 Jan 2006, 07:51; edited 1 time in total
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Alucard_the_dex


Joined: 04 Oct 2005
Posts: 317

PostPosted: Thu 05 Jan 2006, 04:45    Post subject:  

Is there anything of the such to mass Edit pictures for linux?
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deshlab


Joined: 23 Jul 2005
Posts: 82
Location: oldenburg, germany

PostPosted: Thu 05 Jan 2006, 07:35    Post subject:  

Alucard_the_dex wrote:
Is there anything of the such to mass Edit pictures for linux?

xnview (dotpup) has a tool called "sequence convert". it can not only convert a mass of images but while doing that also resize them, change contrast etc.
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1ColdBeer


Joined: 02 Oct 2005
Posts: 36

PostPosted: Fri 06 Jan 2006, 22:55    Post subject:  

Hi deshlab,

Using XnView open any image... Then click image > adjust for all the options. Does a nice job on color too.

Have fun,
Dave

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