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DPChallenge Forums >> Tips, Tricks, and Q&A >> How big of a print can I get with 2.1 megapixel?
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Showing posts 26 - 35 of 35, (reverse)
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 07/17/2002 03:22:58 PM · #26
Originally posted by timj351:
But wait, there's more. A tif and the highest quality jpeg will still have the same number of pixels. The file size in the jpeg is reduced only because color information is tossed out which is barely noticeable. There is very little reason to use tifs because they are nearly, and in most cases, absolutely indistinguishable from the highest quality jpegs.

Tim J


You need to save a version in TIFF (or the editor's "native" format) because each time the JPEG is changed (plain open/close is OK) the file will be recompressed and additional data lost. For example, you might want to make a new size. If you resample the JPEG, you are already starting with degraded data; resampling the TIFF should yield a better result.
Think of copying a brochure on an office copier, then making a copy of the copy, and a copy of that...

Paul

 07/17/2002 03:23:09 PM · #27
Originally posted by Karen Bryan:
Kim, there's a suggestion area in the tutorial section for other site tutorials.


Done. Thanks, Karen! I really should know this stuff by now...:-)


 07/17/2002 03:29:38 PM · #28
Originally posted by Kimbly:
There's a very thourough explanation of the above topic at the Luminous Landscape. It helped me figure this all out, at least. It has Photoshop illustrations and all, too. I really recommend reading slowly and maybe even a few times to really get these concepts down, cause they're crucial to being able to print and even to resize for website submissions.

I knew I'd seen a good explanation of this recently! I also found this handy chart at AGFAnet delineating various print sizes in terms of pixel dimensions and file size (TIFF and JPEG)
 07/17/2002 04:03:13 PM · #29
This is what I do and it seems to work for me. I shoot my photos as jpegs and then put all those photos into a folder which is named and dated. Then I create another folder inside of the original folder and name it 'Edited'. I then view all my photos using my ACDSee browser and take note, with paper and pencil, of the photos that are the best ones. I then 'copy' those photos into my 'Edited' folder. When I am finished with that I open up Photoshop I work on the photos from My 'Edited' folder only. I don't work on the originals I only work on copies so I never need to covert anything to tiffs. By the way, contrary to popular belief, you can open and close a jpeg image all day long and it wont ever degrade. The image only degrades if you change something in the image and, even then, the amount of degradation is dependent on how significant the changes were.

Tim J
 07/17/2002 04:13:21 PM · #30
I do much the same as Tim except I try to immediately copy the folder of unedited photos to another media (e.g. ZIP, CD-R) as well. When I think I'm finished editing, I save a final composite image in TIFF format, and then create both high- and low-resolution JPEGs from that.

Paul
 07/17/2002 06:28:01 PM · #31
Wow, I got my answer and almost learned something.

Next question is, How many BCPI(brain cells per inch) will it take me to understand all that? (please, no cropping the brain cells)

Thanks
Tim
 07/17/2002 06:45:33 PM · #32
I, too, have a 2.1 mega pixel limitation, Paul.

I''m playing with a new piece of software - Genuine Fractals - in which one can allegedly start out with a thumbnail size photo of excellent quality and extrapolate it up to 400, even 800% with no loss in quality. The company shelled out the $150 it cost. I''ve just begun to play with it. I must say, none of the work shots I''d previously taken were of sufficiently high quality to WANT a big image of them (except in the publications I produce). So far - garbage in/garbage out. Now it''s just big garbage...and it''s no worse than when it was little garbage. That IS saying something.

A trial version can be downloaded from their website. I don''t know the link right now.


* This message has been edited by the author on 7/17/2002 6:46:43 PM.
 07/17/2002 06:47:50 PM · #33
This should get you there, if you're interested.
]//www.altamira-group.com/solutions/photo/[/url]
 07/17/2002 07:30:35 PM · #34
well...it's 7:30 pm here and I'm still at work. I just wanted to leave a note to thank you all for your help. I'm going to take some time and look over Luminous Landscape when I finally get home. Thanks Kimbly :)

Thanks all...

K
 07/17/2002 07:37:37 PM · #35
GeneralE ... to add to your already busy schedule...

Would you be interested in adding a couple screenshots or examples to the short story you wrote this afternoon, and we'll throw it up as a user-written tutorial? :D

Drew
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