Dpi question

oakfieldphotography.com

Hi all
i have read on this forum that dpi doeent count for much but here is one question you all might be able to help me with please.
I emailed some pictures of an event to the organiser and the images were 71 dpi. Do i need to re-email the same photos with a highher dpi. Seems like the 350dpi pictures are the same file size as their 71 dpi counterparts.
Before i get nailed here, i wanted to email the full size resolution as this was a charity event.

Regards
Patrick:D

ziggy53

I moved this to the Finishing School forum, were you'll find more similar threads. Look especially at this recent thread:

http://dgrin.com/showthread.php?t=197002&highlight=dpi

oakfieldphotography.com

ziggy53 wrote: »

I moved this to the Finishing School forum, were you'll find more similar threads. Look especially at this recent thread:

http://dgrin.com/showthread.php?t=197002&highlight=dpi

Sorry Ziggy53. Thanks

Pat.:D

ThatCanonGuy

Monitors do 72 dpi max. Printers go higher. If it's only gonna be viewed on a monitor, 71 is fine.

NeilL

dpi = dots per inch, therefore refers to (some) print media

for (some) digital displays the term is ppi = pixels per inch

for talking about image resolution it's also ppi = pixels per inch, but the pixels in this case are image file data, not screen display data

in your case, if the file data (image resolution) is higher than display resolution, in most cases there will be no visible difference on a screen no matter how much higher that is, eg a 300ppi file resolution and a 100ppi file resolution will look the same on a 71ppi display

provided that, if the image file resolution is reduced (eg by enlargement) from the native resolution of the sensor there are no artifacts introduced

for printing, each machine has its own resolution specs, and yes the higher the image resolution the better quality the print, up to the capacity of the printer

Neil

pathfinder

dpi - dots per inch is a printer specification of how many dots of ink a printer will put on paper, per inch, and has nothing to do with image file sizes.

Many folks confuse dpi with pixels per inch, and it is sometimes easier to humor them than explain their error in using dpi, when what they are discussing is ppi..

The real question is how many pixels you have in your image on the long and short border, which then, will tell you how large your image file is in Megapixels or Gigapixles even. Once you know how many linear pixels you have, you can calculate how large your image can print at 300 pixels per inch or whatever. 72 pixels per inch is an old monitor standard, that is out of date today.

My discussion of image size, resolution, etc is here - http://pathfinder.smugmug.com/Other/Resolution-Resizing-and-Dots/2246604_CgPjC