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FORUMS Post Processing, Marketing & Presenting Photos RAW, Post Processing & Printing 
Thread started 04 May 2013 (Saturday) 21:48
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upsampling after post?

 
nathan549
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May 04, 2013 21:48 |  #1

i wanted to print 12x18 prints at 300 ppi, now my cameras 18 megapixels just come under that, but i have already edited them in post and exported into tif's. Will there be any detriment to my photos upsampling that small amount after all editing has been done?


Canon 60D - 24-70mm 2.8 L II - 70-200mm 2.8 L IS II - Speedlight 600 ex-rt - Broncolor Move 1200L pack + A2L pack + MobiLED flash head

  
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Damo77
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May 04, 2013 21:51 |  #2

No, not at all.


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nathan549
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May 04, 2013 22:17 |  #3

Damo77 wrote in post #15898378 (external link)
No, not at all.

Thank you!!


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RandMan
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May 07, 2013 12:00 |  #4

nathan549 wrote in post #15898373 (external link)
i wanted to print 12x18 prints at 300 ppi, now my cameras 18 megapixels just come under that, but i have already edited them in post and exported into tif's. Will there be any detriment to my photos upsampling that small amount after all editing has been done?

A small amount of upsampling is just fine. I also have an 18mpx camera (t2i/550D) and I have made 24x36 posters for the hallways here at my job. It wasn't easy, but if you're going to jump up more than 10% or so, I highly recommend you use a "staircase" approach:

1) In the Image Size dialogue, change the top parameters to "percent" rather than pixels, inches etc.
2) Upsample by 5%. Repeat. Repeat--until you get to your desired final size.
3) Carefully sharpen

Doing this allows the resampling algorythym to work multiple times on lighter work loads.

Have fun!


Canon eos7D | Canon 50mm 1.4 | Canon 17-55mm 2.8 | Sigma 70-200mm 2.8 | Yongnuo 565ex | Yongnuo yn-468 II | Canon ef28-135mm 3.5/5.6 | Canon ef-s 55-250mm 4.0/5.6

  
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Damo77
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May 08, 2013 23:57 |  #5

The "staircase" thing hasn't been relevant for years. Don't worry about it.

If you have some nerdy energy you need to expend, use it to try upsizing with the three Bicubic interpolation methods instead, and choose the best one.


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upsampling after post?
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