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calamity
Joined: 05 Apr 2008
Posts: 2
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 Posted: Sat Apr 05, 2008 8:34 pm Post subject: resizing help |
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Hello, I am new to the forum and I was hoping someone would be able to answer my question! I was wondering if it is possible either through photoshop or another program to resize a photo very largely. We were looking to have banners made that would show artwork on them. The company said that the artwork needed to be sent print ready and in the actual size. Is it possible to resize a photo from 10 inches too say 10 feet without completely distorting the photo? Even if you do it keeping the same proportions. And would anyone have any idea of what DPI you would need to achieve this?
I hope I do not sound completely inept, I am not at all photo software savvy. I am happy when I can get photoshop to crop!
Thanks for reading my question and thank you in advance for any help!  |
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Matt
VIP
Joined: 24 Sep 2007
Posts: 3515
Location: Haverhill, UK
PS Version: Lightroom 5, CS4 & Elements 11
OS: Windows 8.1
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| Posted: Sat Apr 12, 2008 7:27 am Post subject: |
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Hi,
Yes upsampling is possible in Photoshop using the Image size command (Image > Image Size). Make sure you have the 'resample image' option ticked and then enter your new document size. The resampling method is also important for this kind of work, try either bicubic or bicubic smoother, these are generally the best options for upsampling.
You also asked about the DPI, Photoshop works with PPI (pixels per inch) and allows you to change it inside the image size dialogue box as well. For printing purposes you'll need a resolution of around 300PPI.
Finally, you mentioned image distortion that occurs when radically upsmapling an image. Generally, the trouble with upsmapling is that you're asking Photoshop to create new pixels based on an average of pixels that already exist. How the average is calculated is a function of the resampling method discussed above, but ultimately you end up with a softer, less defined image simply because you're not introducing any new details - just averaging pixels that are already there. For that reason it's always a good idea to avoid upsampling where ever possible!
Hope this helps
_________________
Matt
3photoshop.com
http://www.3photoshop.com |
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calamity
Joined: 05 Apr 2008
Posts: 2
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| Posted: Sat Apr 12, 2008 3:04 pm Post subject: |
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Great! Thank you so much for your help. I will try that today and let you know how it works! |
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