# Print Resolution Question 1 reply

46 and 2, are just ahead of me

255,785 XP

23rd September 2004

24,266 Posts

#1 13 years ago

I suppose you could deem it a graphics/tech question, but since the people here usually know just about anything computer-realted I'll ask here.

I'm conducting a contest for a front cover of a standard 8.5" x 11" page size, but, since I'm allowing it to be a contest for hand-drawn and digital submissions, I have to take all the fun print ratios into effect.

I did find an interesting site that helped a lot: http://www.microscope-microscope.org/imaging/image-resolution.htm

Example, you have a 640X480 image and you want to print it at 200 dpi (dots or pixels per inch). 640 divided by 200 equals 3.2 and 480 divided by 200 equals 2.4 so if you print this picture at 3.2"X2.4" you will get a print with 200 dots per inch. We recommend 200 dpi as a minimum for good quality prints. Now, let's work one of these problems backwards. Let's say we want to print an 8X10 picture at 300 dpi. What resolution must we have to do this? (stop here and figure it out, or read on ;~) OK, 300 times 8 is 2400 and 300 times 10 is 3000. So we would need a 3000X2400 image to do this. Let's see, 3000X2400 is 7.2 megapixels! That would be one very nice digital camera and one very large file, especially if it wasn't compressed.

Now, I would like to include a pixel size in the flyer, along with the 8" x 10" size restriction, but I'm not sure how low I can get that "pixels per inch" value so that it keeps it all good for printing.

As of right now, I have 576 x 720 pixels as the value for 8" x 10", which would put the resolution at 72 (much too low for printing).

Since I'm blabbering, I'll sum it up - What is the lowest pixels per inch value I can use so that the printed image will show up good?

(move this to graphics if no one knows)

Thanks guys.

46 and 2, are just ahead of me

255,785 XP

23rd September 2004