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12/10/2007 03:28:09 PM · #1 |
Your help please in better understanding the results of resizing as it relates to DPChallenges.
GIVEN THE FOLLOWING:
DPC required parameters =<640p, =>160p, =<150kb
Using these figures as the example:
PIXEL SIZE
Width: 1755
Height: 1168
Resolution: 117 pixels/cm
PRINT SIZE
Width: 15 cm
Height: 9.98 cm
A. To obtain 640 pixels and maintain a resolution of 117 ppc (298 ppi) results in a very small 5.47 x 3.64 cenimter (2.13 x 1.42 inch) print.
B. To obtain 640 pixesl and maintain a large 14.55 x 9.68 cenimeter (inch results in a resolution of 44 ppi. print with 140.2 @ 97% quality (
Note: Both A & B result in a 140.2 kb @ 97% quality in order to meet the =<150kb perameter
______________________________
For the purpose of competing in DPChallenges...
A. Is it more important to maintain the highest possible resolution?
OR
B. Is it more important to maintain a larger print size?
Thank you for your continued tutoring...........
louisp
Message edited by author 2007-12-10 15:38:21. |
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12/10/2007 03:37:32 PM · #2 |
Print size is irrelevant to web display. All that matters is pixel dimensions. The monitor maps the pixels 1:1.
When you are printing, you can choose how fine a pixel-mapping you need; i.e. 300 ppi, 200 ppi, whatever. Obviously, 200 ppi, given a specific pixel dimension of the image, will give a larger print than 300 ppii.
All you need to do for DPC is make the final image 640 pixels on its long dimension, and as close as you can to 150kb in size, by varying the JPG compression ratio as needed.
R.
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12/10/2007 03:37:34 PM · #3 |
| Is there any benefit to 300ppi on the web? |
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12/10/2007 03:38:36 PM · #4 |
Originally posted by cloudsme:
Is there any benefit to 300ppi on the web? |
None whatsoever; ppi is utterly irrelevant to web display.
R.
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12/10/2007 03:45:26 PM · #5 |
As explained by A and B in your original post, a 640px file will result in small or poor prints. The answer, then, is to use different files for printing and for the web.
If it's DPC Prints you're worried about - it allows you to upload a separate (large resolution) file for the purpose of printing. |
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12/10/2007 03:52:17 PM · #6 |
Originally posted by smurfguy:
As explained by A and B in your original post, a 640px file will result in small or poor prints. The answer, then, is to use different files for printing and for the web.
If it's DPC Prints you're worried about - it allows you to upload a separate (large resolution) file for the purpose of printing. |
Good point. If that's your issue, if you're trying to use the SAME file for DPC display and for printing, well don't do that. It doesn't work.
Create a full-size file that's just the way you want it for printing, then save-as another file name and resize it to the 640-pixel dimensions for DPC challenge entries.
R.
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12/10/2007 04:40:39 PM · #7 |
Originally posted by Bear_Music:
Create a full-size file that's just the way you want it for printing, then save-as another file name and resize it to the 640-pixel dimensions for DPC challenge entries.
R. |
If you do that, make sure your editing for the print conforms to the applicable rule set.
I think most people edit their original image twice, once for the entry version and separately for the print, where no (DPC) editing rules apply.
The print associated with your entry need not be identical to the entry -- you can process or crop differently, add a border/text, etc. Any prospective purchaser will see a new thumb of the final print image before they buy.
NOTE: The (big) print image does not count against your Portfolio space allocation, only the entry-sized image you link to; if it's a challenge entry, it desn't count against the disk quota at all.
Message edited by author 2007-12-10 16:42:35. |
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12/10/2007 04:50:25 PM · #8 |
Originally posted by Bear_Music:
Originally posted by cloudsme:
Is there any benefit to 300ppi on the web? |
None whatsoever; ppi is utterly irrelevant to web display.
R. |
Bear_Music the source of endless knowledge ROFUL ) |
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