Old 03-20-2013, 03:58 AM   #1
stlgevo51
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Default DPI, TIF, lzw--What???

I was recently looking at some photography sites and noticed a lot of detail about saving images on Photoshop. I learned a few new "terms"-if you can call them that- such as dpi, tiff, lzw, and what not. Apparently these files/settings are important when publishing/printing photographs, but I don't understand really what they are. Can someone clue me in on what all this stuff means, how I can use it, and where I can access it on PS Elements 8?

Thanks!
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Old 03-20-2013, 04:53 AM   #2
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TIF and LZW - TIF/TIFF is a file format, LZW is a type of TIF that is compressed without loss. By contrast, any JPG (including straight out of camera) loses some amount of information as part of the compression scheme (and so can compress to a smaller size).

http://www.scantips.com/basics9t.html

I personally shoot raw and save raw and jpg files, so I don't know much about TIFF.

DPI - dots per inch. Irrelevant for web display, relevant for printing. Not my thing. Web searches are your friends.
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Old 03-20-2013, 06:36 AM   #3
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Interesting how the term refresh rate has also lost significance.
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Old 03-20-2013, 07:10 AM   #4
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Interesting how the term refresh rate has also lost significance.
Due to Viagra?
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Old 03-20-2013, 12:50 PM   #5
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DPI - dots per inch. Irrelevant for web display, relevant for printing. Not my thing. Web searches are your friends.
I've always read that 72dpi is best for web, 300 dpi best for printing. So I've always followed that whether it mattered or not.
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Old 03-20-2013, 02:08 PM   #6
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I've always read that 72dpi is best for web, 300 dpi best for printing. So I've always followed that whether it mattered or not.
I see you are OCD except for knowledge, where you are chill to the max!

For putting a shot on the web, all that matters is the pixel dimension. The DPI setting has no effect at all.

My vague sense for printing is that more is always better, although at some point it does not matter much. On the rare occasions I print, I also ignore it, in that the place that does my printing (local) simply requires me to upload my shot (so I use the max pixels I have) and say how big I want the print.

Anyone interested in more serious printing should not be consulting with me.
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Old 03-20-2013, 02:49 PM   #7
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I rarely look at dpi, and I print tons of photos.

Loyd L.
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Old 03-20-2013, 06:45 PM   #8
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http://www.webdesignerdepot.com/2010...e-myth-of-dpi/
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Old 03-20-2013, 07:06 PM   #9
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I see you are OCD except for knowledge, where you are chill to the max!
That's where the ADD kicks in.

I'm OCD on things I can control.
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Old 03-21-2013, 01:48 PM   #10
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I rarely look at dpi, and I print tons of photos.

Loyd L.
A 11x14 or bigger will look better at 300 dpi then 72 a size that all web shots are posted at.
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Old 03-21-2013, 07:46 PM   #11
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A 11x14 or bigger will look better at 300 dpi then 72 a size that all web shots are posted at.
To be technically correct - I think! - web shots are not posted at any particular dpi, which is ignored. Rather, the shot's size depends solely on its pixel dimensions, the resolution of the display device, and the size of the display device. So a 1024x768 will appear one size on a 14" and another size on a 19" when set at the same monitor resolution, and for any monitor the size of the image depends on the resolution setting one has chosen (say, 640x480 - waay old standard! - vs 1280x960).

To quote from the wiki: "A digitally stored image has no inherent physical dimensions, measured in inches or centimetres. Some digital file formats record a DPI value, or more commonly a PPI (pixels per inch) value, which is to be used when printing the image. "
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