* fotch [06-07-14 16:47]:

I tried the search engine for an answer but didn't have any luck. I just resized a basic line drawing image using the resize tool, saved the file and tried to print it. When doing a print preview I noticed the image is the size of the original. What have I missed?

search google for your answer, but: image_size != print_size they are not the same thing!

(paka)Patrick Shanahan       Plainfield, Indiana, USA          @ptilopteri
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On Sat, 07 Jun 2014 22:46:48 +0200 fotch wrote:

I tried the search engine for an answer but didn't have any luck. I just resized a basic line drawing image using the resize tool, saved the file and tried to print it. When doing a print preview I noticed the image is the size of the original. What have I missed?

Any help would be appreciated.

More information would help. What operating system, printer model and driver, settings in GIMP, etc.

You probably have something set either in GIMP or the printer driver to print to page size. It would need to be set to actual size or the scale factor set the same for both.

Tom

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On Sat, Jun 7, 2014 at 5:37 PM, Patrick Shanahan wrote:

* fotch [06-07-14 16:47]:

I tried the search engine for an answer but didn't have any luck. I just resized a basic line drawing image using the resize tool, saved the file and tried to print it. When doing a print preview I noticed the image is the size of the original. What have I missed?

search google for your answer, but: image_size != print_size they are not the same thing!

It's also better to keep a larger image but modify the dots per inch to adjust the print size so that a more crisp image is printed at the size you require.

e.g. you have 3000x2250 px image and you wanted to print a 9x5" photo it would be better to keep the image the same size and set the DPI to 3000/9 = 333.33 DPI but you would need to calculate and crop the height. If you have 2250/333.33DPI = 6.75". Since that is the case then you should crop your image and make the height 5*333.33 px = 1666.66px.

As a summary if I wanted to print my large image to a 9x5" printed photo I'd have to crop it to 3000x1666px and set the print to 333 DPI (dots per inch) give or take some minor percent error.

SAM

* fotch [06-08-14 10:16]:

* fotch [06-07-14 16:47]:
search google for your answer, but: image_size != print_size they are not the same thing!

Patrick, Thanks for responding. I did as you suggested and found the Gimp User Manual task: 4.3. Change the Size of an Image for print. I think I understand the difference between the two and the point you made. However, I still don't understand why the image I'm looking at in print preview isn't the same size as the image I resized.

Again, image_size and print_size are two completely different things and only related by expected quality output; larger image_size *frequently* means better print quality, but not always.

The background sized to 11x17 appears to be correct in print preview, but the image I resized (4x's it's original size) on the 11x17 background prints as it's original size.

Yes, image_size != print_size

I'm not sure if I'm explaining this correctly, but you can enlarge an image and print it out to it's new size can't you?

You certainly can, but you must change the *print_size* when you export the image or in the print application.

I'm on a Mac and can't figure out how to do a screen capture to show you what I'm talking about.

I do not need it. I understand what you are saying, but I have failed to make you understand the difference between image_size and print_size.

Any other thoughts?

open your image in gimp
select "image" then "print size"
adjust the print_size, width/height or x/y resolution export the image or print from gimp paying attention to "print size" and making necessary adjustments if needed.
There are explanations:
http://easybasicphotography.com/image-resolution-pixels-print-sizes.html http://www.photoshopessentials.com/essentials/image-resolution/

Megabytes of an image explains the "storage" size on disk Height/width explains/describes the "canvas" size which is *not* the display or print size

Pixels describes the number of points per inch/... that an image is set to display or print
The same image will display much smaller on a 1920x1080 screen that it will on a 1024x768 screen (from the pixel setting)

If you enlarge the "canvas" size of an image x2 w/o changeing the pixel settings, you halve the pixel settings; ie: 300x300 to 150/150. (really you have quartered it taking width and height into account).

I hope this helps.

(paka)Patrick Shanahan       Plainfield, Indiana, USA          @ptilopteri
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