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03/18/2010 04:15:57 PM · #26 |
Originally posted by marcusvdt:
I'm just getting into this stuff now and wanted to point more detailed information so others may benefit of it.
You should upsize ONLY when converting from RAW to 8 bit TIFF. On my RAW softwares I can set the resulting tiff image to whatever dimensions I want, I just need to find which dimension will result in a +48MB TIFF file size.
Then you should open this 48MB TIFF file on you preferred editor (mine is Corel PSP X3, but many uses Adobe Photoshop), and then you can adjust/fix/correct the image.
When finished with the post processing, click File, Save as, anything.jpg. Remember that you must choose the highest JPG quality at this moment.
The resulting jpg file will be a lot smaller than 48MB. Its size will depend of variation of pixels inside of the image, but in general will have a size of 5MB or so.
Capiche? |
Convert from RAW (Upsizing if necessary) to a 16 bit file, only convert to 8 bit when you've finished any adjustments that are needed. |
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03/18/2010 04:20:41 PM · #27 |
Originally posted by marcusvdt:
... I just need to find which dimension will result in a +48MB TIFF file size. |
4750 x 3563 (4:3 aspect ratio)
5050 x 3367 (3:2 aspect ratio)
get you close to 48MB, with a little over to spare.
You can always check by creating a new RGB document in the desired aspect ratio, and then doing an image resize/resample, into which you plug various dimensions until you get a big enough file.
Message edited by author 2010-03-18 16:22:20. |
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04/09/2010 02:23:33 PM · #28 |
| bump to put on my profile |
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04/09/2010 02:45:02 PM · #29 |
Ok, read the last few posts and think they will come in handy as so far the images I have been preparing for QC looked distressingly soft after I did the convert to 8 bit TIFF.
So now I will go and try working with a 16 bit TIFF and see what happens. Hopefully my poor old iMac won't blow up on me! |
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04/09/2010 06:49:40 PM · #30 |
Originally posted by Chinarosepetal:
Originally posted by marcusvdt:
I'm just getting into this stuff now and wanted to point more detailed information so others may benefit of it.
You should upsize ONLY when converting from RAW to 8 bit TIFF. On my RAW softwares I can set the resulting tiff image to whatever dimensions I want, I just need to find which dimension will result in a +48MB TIFF file size.
Then you should open this 48MB TIFF file on you preferred editor (mine is Corel PSP X3, but many uses Adobe Photoshop), and then you can adjust/fix/correct the image.
When finished with the post processing, click File, Save as, anything.jpg. Remember that you must choose the highest JPG quality at this moment.
The resulting jpg file will be a lot smaller than 48MB. Its size will depend of variation of pixels inside of the image, but in general will have a size of 5MB or so.
Capiche? |
Convert from RAW (Upsizing if necessary) to a 16 bit file, only convert to 8 bit when you've finished any adjustments that are needed. |
Ok sounds good, but wouldn't after working with a 16-bit TIFF, I would want to save it as a quality 10-12 jpeg? Is there not the risk of more image degradation with each new conversion? |
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04/09/2010 08:36:17 PM · #31 |
When you convert from 16 to 8 bit, you should SaveAs to a new file, so you don't overwrite the higher-res file.
As I understand it, the highest quality JPEG compression in CS versions of Photoshop are lossless, so you should not get image degradation if you heve to open and re-save such a JPEG. TIFF files saved with the LZW option also have lossless compression, but may have to be re-saved without compression before they can be used with certain other applications which don't have a filter for the LZW format option.
When you first convert from RAW, I would save in the native Photoshop (.PSD) format -- it gives you the most options (like saving adjustment layers) and uses its own compression to save space. For a DPC entry I'd typically have the following files and workflow:
Original > Photoshop > TIFF (flattened) > TIFF (resized, sharpened) > JPEG |
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04/09/2010 09:40:31 PM · #32 |
Ok, thanks for clearing that up  GeneralE! |
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04/28/2010 05:34:26 PM · #33 |
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