-
1. Re: Resizing DPI
Q Photo Oct 28, 2009 3:43 AM (in response to sfjedi)In image size, replace 72 PPI with 300 PPI. Be sure that RESAMPLE in NOT checked. You will end up with an image that is slightly over 7" by 10" at 300 PPI. DPI (Dots Per Inch) is a printer setting and has nothing to do with image size, which is stated in Pixels Per Inch.
Make a copy layer and do your work on it, not the original background layer.
-
2. Re: Resizing DPI
Maneet Puri Oct 28, 2009 3:41 AM (in response to sfjedi)Hi,
Yes, you are on the right track. Change the resolution to 300 dpi.
Cheers,
Maneet Puri,
LeXolution IT Services
-
3. Re: Resizing DPI
D Fosse-QDEaQ1 Oct 28, 2009 3:54 AM (in response to Maneet Puri)Maneet Puri wrote:
Hi,
Yes, you are on the right track. Change the resolution to 300 dpi.
This is very misleading when not qualified. Q has it right, but just to fill in:
Image quality is determined by the pixel dimensions, nothing else.
Resolution in ppi (not dpi) is just metadata to tell the printer what physical dimensions to print at. It helps you determine how many pixels you need for a given reproduction size. For commercial reproduction in books, magazines and so on the requirement is usually 300 ppi, so that tells you how big it can be reproduced with the pixels you have.
-
4. Re: Resizing DPI
sfjedi Oct 28, 2009 4:45 AM (in response to sfjedi)OK, let me clarify a little bit here.
Think of it as a coloring book, because that's exactly what it is. The black lines (drawing) is on its own layer on top of everything with a multiply filter so only the black portions show through. This image is at 72 ppi.
Now, the part I'm going to airbrush sits directly beneath this layer. If I increase the image resolution to 300 ppi, this layer will be 300 ppi because I'm painting fresh on it, right?
But then when I print it, won't the top layer look all pixelated, potentially? And the layer beneath it will look more clean? The layers won't be consistent in print, but it will be on the screen?
If this were the case, I might as well just keep it at 72 ppi and paint on that, no?
Maybe I'm missing something here?
-
5. Re: Resizing DPI
shunithD Oct 28, 2009 5:08 AM (in response to sfjedi)Jed,
All layers will be at the same ppi as a simple check in Image Size will tell you. You can't have different layers set at different ppi in the same file.
Please understand the following:
1/ The size of the image is determined by the pixels (width) x pixels (height). A file of 900 x 900 pixels at 72 ppi is the same size as a file of 900 x 900 pixels at 300 or 600 or even 1000 ppi per inch.
2/ The 72 ppi and 300 ppi is as follows:
a. At 72 ppi, the above file will print at 12.5 inches x 12.5 inches (larger print area, poorer quality)
b. At 300 ppi the file will print at 3 inches x 3 inches (smaller print area, better quality)
But the file is the same size... Only information to the printer is different. So for best output quality, do what was suggested. Keep the pixels count intact. Just increase the ppi to 300 with the Resample option unchecked.
-
6. Re: Resizing DPI
sfjedi Oct 28, 2009 5:57 AM (in response to shunithD)shunithD wrote:
1/ The size of the image is determined by the pixels (width) x pixels (height). A file of 900 x 900 pixels at 72 ppi is the same size as a file of 900 x 900 pixels at 300 or 600 or even 1000 ppi per inch.
2/ The 72 ppi and 300 ppi is as follows:
a. At 72 ppi, the above file will print at 12.5 inches x 12.5 inches (larger print area, poorer quality)
b. At 300 ppi the file will print at 3 inches x 3 inches (smaller print area, better quality)
Ding!!! Light bulb finally turned on! I've dealt with this confusion for YEARS and YEARS and I understood it to an extent, but only NOW do I finally understand it 100%!
I even read all about it before, but I think the location of this setting has always been the source of my confusion. It seems like it belongs in the print settings to me.
shunithD wrote:
But the file is the same size... Only information to the printer is different. So for best output quality, do what was suggested. Keep the pixels count intact. Just increase the ppi to 300 with the Resample option unchecked.
So, if I understand correctly, this change in the ppi really doesn't matter if I do it before or after I do my airbrushing, does it?
-
7. Re: Resizing DPI
D Fosse-QDEaQ1 Oct 28, 2009 6:11 AM (in response to sfjedi)As long as you don't resample, no, it doesn't matter. It doesn't affect the file itself.
And yes, that could have been in the Print dialog. The problem is that if "resample" is checked, the whole thing turns into a completely different (and much more dangerous) animal. Another problem is that it's also used when placing smart objects.
If it was up to me, resample should have been taken out of the image size dialog and put in its own file size dialog. That innocent-looking little checkbox is a stick of dynamite concealed as candy.
BTW shunithD's post is a splendid explanation.
-
8. Re: Resizing DPI
sfjedi Oct 28, 2009 6:15 AM (in response to D Fosse-QDEaQ1)D Fosse wrote:
As long as you don't resample, no, it doesn't matter. It doesn't affect the file itself.
Thank you!
D Fosse wrote:
BTW shunithD's post is a splendid explanation.
I 100% agree and apologize to him that I am new to these "mark as helpful" and "correct answer" buttons and it seems that it's too late for me to go back and mark his as the correct answer, or I would have swapped yours for helpful as his as the answer.
Sorry, shunithD!
-
9. Re: Resizing DPI
D Fosse-QDEaQ1 Oct 28, 2009 6:19 AM (in response to sfjedi)That's OK. I owe you one, shunith...
(And on second thought I suppose it couldn't be in the Print dialog for many other reasons, but...hypothetically...it could).
-
10. Re: Resizing DPI
shunithD Oct 28, 2009 7:56 AM (in response to sfjedi)No problem Jed... As long as you've got the concept right!!
-
11. Re: Resizing DPI
shunithD Oct 28, 2009 7:58 AM (in response to D Fosse-QDEaQ1)D Fosse wrote:
That's OK. I owe you one, shunith...
I'll settle for a beer one of these days Even a virtual beer is better than these ive A$$ points!
-
12. Re: Resizing DPI
D Fosse-QDEaQ1 Oct 28, 2009 9:34 AM (in response to shunithD)You got it. I assumed you wouldn't mind


