Go Back   Steve's Digicams Forums > Software > Printing General

Reply
 
Thread Tools Search this Thread
Old Sep 17, 2005, 6:10 PM   #1
Senior Member
 
pineywoodsman's Avatar
 
Join Date: Jun 2005
Posts: 189
Default

What is the recommended size I can printa photo at ?

I know the more dpi, the less of a size the photo can be without looking blurry.

Can I print this on an 8x10? I did print out a print on printer's normal DPI (HP 932C) but before I print out on photo quality paper and higher dpi what is the largest I can print. I don't print most of my photos, just a few, which is why I haven't seen any reason to go above 3.2MP, since I just view most of my photos on screen.

I realize I can't upload the full resolution photo (1,110kb) so I'll upload a smaller version.


Attached Images
 
pineywoodsman is offline   Reply With Quote
Sponsored Links
Old Sep 18, 2005, 10:49 AM   #2
Member
 
Join Date: Mar 2005
Posts: 32
Default

If that's a full frame (not cropped) from a 3mp camera, you should be fine to print to 8x10. Doubtful it will go much bigger, though.
-Brett
smitbret is offline   Reply With Quote
Old Sep 19, 2005, 6:09 AM   #3
Baz
Senior Member
 
Baz's Avatar
 
Join Date: Aug 2003
Posts: 219
Default

Yes Piney, thats a very nice sharp picture. But it is difficult to advise of maximun print size from a lower resolution screen image.

You imply it is from a 3mp image, and as Smit says it should print 8 x 10 alright. I've printed 8x10 from 2 & 3mp images with excellent results using a Canon printer and photo quality paper.

The best way to figure about maximum print size is to calculate from your image pixels with a selected dpi.

That is: the recommended dpi for satisfactory prints is 200 or more.
And so take the pixel width & divide by say 200 = image width inches.

So from the 3mp image thats about 2000 pixels wide, it will print 10" wide OK.

The moral is to ALWAYS use the highest resolution & least compression in the camera, because you never know when you may get a special image like you posted, that you could want to print big!.. The more pixels the better..

Many people dont do this because of limited memory card storage. Big mistake for the reasons mentioned. Take & save the image at the best quality. It's easy to reduce the image for emailing & screen viewing, but you cant get the pixels back for a good big print.

Baz is offline   Reply With Quote
Old Oct 6, 2005, 2:08 PM   #4
Senior Member
 
Join Date: May 2005
Posts: 493
Default

I've printed 3.1mpimages that had 180 ppi at 8x12 and got decent results. I did use SI interpolation to help reduce pixelation. SI interpolation is basically doing the bicubic resampling upwards in 5% imcrements.

If your printer prints at 600dpi (HP & canon printers) you'll need to resamle a 8x10 or 8x12 image about 21 times (unless you have a software script to do it for you) to get the 180 ppi image to print at 600dpi for best results. You could just send the 8x10 image to the printer and let it upsample to it's native resolution but if you do the SI interpolation it would probably make the image look a little better than if you didn't.

For PPI calculations you can use my easy and free online calculator at http://www.mattspinelli.com/ppicalc.html

Here is the results from the program if your image is exactly 3.2 mpsand a 4:3 (1.333) aspect ratio:

PPI for the following sizes:

4 x 6 = 344.17
5 x 7 = 295
6 x 8 = 258.13
6 x 9 = 229.44
8 x 10 = 193.63
8.5 x 11 = 182.24
8 x 12 = 172.08
10 x 13 = 154.9
10 x 15 = 137.67
11 x 14 = 140.82
12 x 16 = 129.06
16 x 20 = 96.81
16 x 24 = 86.04
18 x 24 = 86.04
20 x 30 = 68.83
24 x 36 = 57.36
30 x 40 = 51.63









nelmr is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 5:52 PM.