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02/16/2006 12:37:26 AM · #1 |
I have few questions on Interpolation -
1. WHEN? At what step in processing shall I interpolate image to higher size?
2. HOW? Any special technique to use for better quality? I will be using bicubic on photoshop but I also have irfanview on my machine which has some different interpolation algo.
3. HOW MUCH? How much shall I interpolate if all I want to achieve is largest possible size without compromising much on quality. My intent to make print-ready images for DPCPrints.
4. AND what are other general tips related to this topic (anything I need to do before or after I interpolate the image)
Some facts - I normally shoot with 7 MP camera with hightest quality JPEG. But after cropping etc, I'm left with 4-5 MPs.
I know this is wrong time to raise a query esp when half of the west is sleeping, but I'll keep it alive till I get my answers :)
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02/16/2006 12:40:24 AM · #2 |
After cropping to the print ratio that you are looking for, increase pixel size at 10 percent intervals on the longest side till you hit the size you are trying to achieve. Unless you have modern software than you will have to ask someone else! ;-)
Edit: Then you may have to sharpen to taste...
Message edited by author 2006-02-16 00:41:00. |
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02/16/2006 12:46:12 AM · #3 |
Upsize after ALL editing has been finished but BEFORE you sharpen. Once you get your desired size, then you should sharpen. And personally, I don't think I'd go over double the initial image size.
Also, if you have photoshop CS/CS2, I've heard that it's better to interpolate in ONE step using 'bicubic smoother.' Otherwise, do as TooCool suggested and do several small steps using 'bicubic.'
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02/16/2006 12:50:14 AM · #4 |
Originally posted by TooCool:
After cropping to the print ratio that you are looking for, increase pixel size at 10 percent intervals on the longest side till you hit the size you are trying to achieve. Unless you have modern software than you will have to ask someone else! ;-)
Edit: Then you may have to sharpen to taste... |
Is 10 percent tested figure? I have luxury of even smaller percentages with all the 'machine' time in hand. Should keeping lesser than 10% will give better quality (lets say for 5%)?
..and - thanks for the tips :)
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02/16/2006 12:52:32 AM · #5 |
Originally posted by tejinder:
Is 10 percent tested figure? I have luxury of even smaller percentages with all the 'machine' time in hand. Should keeping lesser than 10% will give better quality (lets say for 5%)?
..and - thanks for the tips :) |
It's late and I just changed from working nites to working days (3rd day tomorrow) so don't ask me for proof, but that WAS the norm before PS CS... |
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02/16/2006 01:23:41 AM · #6 |
Originally posted by TooCool:
It's late and I just changed from working nites to working days (3rd day tomorrow) so don't ask me for proof, but that WAS the norm before PS CS... |
I'll take your word for that :)
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