Re: Stupid question

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Formyrotts@xxxxxxx wrote:
ok, biting the bullet and showing my immense ignorance. 

If someone says to submit a photo that is 640x480, what size is the photo?  Can it be two different sizes and still be 640x480, say a 9x12 or 16x20?  Will the clarity still be there for viewing say on a pull down type movie screen?  Sigh, thanks for any help ahead of time.  Linda B.

It means the want a 640x480 pixel image.   Print sizes are irrelevant.

When printing photos you need to know the paper size and the density of pixels per inch (frequently known as DPI or PPI).   So a 300 DPI 4"x6" photo would be 300 ppi x 4" = 1200 pixels by 300 ppi * 6" or 1800 pixels  wide.    The PPI/DPI is just for scaling.   That same 1200x1800 pixel image at 100 dpi would end up 12x18"  though in both cases you have an absolute 1200x1800 pixels.

So in this example you want to provide them a 640x480 pixel image.  In your photo tool (say Photoshop, you would do an Image->Resize and in the top half of the resize box, you would set it to 640 wide and 480 high ignoring the bottom half (inches and dpi settings).   When your done you have a 640x480 image.

Now if you were to take image after resizing it to 640x480 and you wanted to print it at 300dpi, you would end up with a 2"x1.5" photo roughly.

Since this will probably be a projected image, most modern projectors either project at 800x600 (older models) or 1024x768 (newer models) so a 640x480 image will fill most of the screen at 800x600 and take up about half the screen at 1024x768.
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Rob Miracle
rob@xxxxxxxxxxxxxx
http://www.robmiracle.com


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