Increasing file size in raw for 15mp to 25mp??

Robbo

Robbo

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I could be wrong, but shooting CR2 I thought you could convert into 16bit?

I cant seem to find any options to change for the default save settings.

CS4

Any tips?

Please see post 3 for new question
 
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When you open the file in Camera Raw, there is a link at the bottom of the image that will tell you size of image, bit depth etc. Click on that and it will allow you to select 16 bit mode. From memory, it then defaults to that every time you open the image.
 
Ahhh I see!

seems to work....brings a new question.

The file size, I can increase it from 15.1mp to 25mp?

Whats that about?
 
Robbo said:
The file size, I can increase it from 15.1mp to 25mp?

Whats that about?
Click to expand...
Allows you to resize it upwards on import at a guess....
 
Does it not effect picture quality?

15.1 is the camera mp btw
 
At a guess, yes. Try it and see...
 
To be honest you'll be unlikely to see that it affects your image that much. But best to do so only if you need to. you are letting the software add random pixels that were not in the original although usually it does a decent job.

With the raw you can convert to a 16bit tif but why do you need to? (Just curious) The resultant file sizes are hardly worth it for most general uses.
 
Tbh it has resulted from a 'complaint' by a customer. The topic is in the business section if you wish to read.

So I am just looking at things in more detail to see if there is any part of my processing technique that I can improve on, even if minimal.
 
You can increase the size but not the raw size, the raw is essentailly a data file, when you alter the size in camera raw it only really makes a difference when you open the image in photoshop proper. The raw file stays the same size and if you save as dng it'll most lightly still come out a smaller file size than the original raw.
You can make a nice big tiff but remember that PS is interpolating the image up by adding extra pixels which it has to guess at.
 
EOS_JD said:
With the raw you can convert to a 16bit tif but why do you need to? (Just curious) The resultant file sizes are hardly worth it for most general uses.
Click to expand...

His camera is 12bit depth (at a guess on the camera, forgot to check), so at least he isn't throwing away colour levels on import to 8bit (will on an export though, but if there is a large shift on brightness or hue then it might help)
 
But to print, you'll need to do that anyway?
 
For most home printers, yes.

However, even if you have to convert to 8bit at a later date, the fact that /if/ you are performing an operation like one that I mentioned, a whole shift in colour ranges, then there is more detail that will be saved/recovered/available by keeping the colour depth high until the very end.
For example, if you were to take a 12bit RAW image, opened into 16bit tiff, and expand the last quarter of shadows to be 75% of the total range (as if you are trying to recover a dark image), if you did the same with a 12bit image immediately converted to a 8bit image.
For the 8 bit image, you probably only have around 128 levels left in the image, unless the software interpolates the levels that it sees, in which case you still have the full range, but, they will probably be averaged.
For the 16bit conversion, you would have around 32 thousand levels still available. Even if the software is interpolating, that is a lot more information. If that is then mapped to an 8bit file, you throw away information still, but, it is less damaged by having to have been averaged out first.
 
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coldpenguin said:
For most printers, yes.

However, even if you have to convert to 8bit at a later date, the fact that /if/ you are performing an operation like one that I mentioned, a whole shift in colour ranges, then there is more detail that will be saved/recovered/available by keeping the colour depth high until the very end.
For example,
Click to expand...

Is there an image missing here or something?
 
Sorry, no image, just some nasty maths, and whilst I was doing it, I accidentally posted!
 
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