blowing up

Discussion in 'Photography Beginners' Forum' started by mrmacedonian, Sep 7, 2010.

  1. mrmacedonian

    mrmacedonian TPF Noob!

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    Hey all, my sister moved into her dorm and I thought it'd be fun to blow up one of the photos of my cat for her -- she's got one she took with a camera phone printed out and I want to remedy that -- and I want to try the enlargement process and do it 30x20 for her.

    I've got a 16bit, sRGB, .tiff, @350dpi - 3520x2347px, and its 10x6.7inches atm.

    I went into Photoshop (CS4), checked constrain proportions, and typed in the new width of 30inches and selected the "(Best of Enlargements)" option in the drop-down and Photoshop did its thing. before I spend 20$+ on this I thought i'd search through here but every time I did the majority of hits have to do with film enlargers, sooo I thought I'd see if anyone's got tips/workflows for achieving a 3x enlargement starting from the specs above while maintaining as much image quality as possible.

    If your suggestion involves a specific freestanding program or Photoshop plugin I'd appreciate it if the name and manufacturer were both there so I can find it quickly and accurately :)

    Links, Books, Google Search phrases are welcome, I'm certainly not against doing my own research (exactly what I'm doing as this gets read/responded to); I just figured I'd benefit more from the experience in these "halls."

    Thanks for reading :D

    p.s. I'll post the photo but it'll have to be an 8bit JPEG for Flickr, but I'll keep the size @original (to establish original image quality).
     
    Last edited: Sep 7, 2010
  2. mrmacedonian

    mrmacedonian TPF Noob!

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    [​IMG]

    EXIF:

    Camera Canon EOS 50D
    Exposure 0.008 sec (1/125)
    Aperture f/1.8
    Focal Length 50 mm
    ISO Speed 800
    Exposure Bias 0 EV

    Note 1: I ran this through Imagenomic's Noiseware Professional
    Note 2: I of course have the RAW if I need to do other things before cropping, adjusting curves, etc.
     
    Last edited: Sep 7, 2010
  3. abnormalreply

    abnormalreply TPF Noob!

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    This is lovely, but I think most people should remember that just because their lens can open up really wide doesn't necessarily they should always open it up all they way. With most lenses, the widest aperture is rarely the sharpest and not always necessary. I think this would be a really nice picture if the rest of the cat was also in focus.
     
  4. mrmacedonian

    mrmacedonian TPF Noob!

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    no this was actually a decision I made rather than just a happening. I could have opened it to 1.4 :p

    but in all seriousness, this is the DoF I wanted for this particular photo, maybe f/2.0 but then again with a cat you can't really tell her to get back into position :p I'm quite happy with the photo, just wanna learn how to explode it to 30x20 :D
     
  5. LCARSx32

    LCARSx32 TPF Noob!

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    Does your sister like pop art? Because you could enlarge the image to the proper dimmensions in photoshop and then apply the "color halftone" filter. It would look fine from a distance but up close would be little circles of color. Like a comic or newspaper.

    It's a good way to blow up images while still having something neat to look at when up close.

    Just an idea. :D
     
  6. dak1b

    dak1b TPF Noob!

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    love the cat!

    great details on the eyes. eyes almost make it.

    very nice.
     
  7. mrmacedonian

    mrmacedonian TPF Noob!

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    That's a pretty sweet idea! I'm not sure how much she'd appreciate it, but hell I could find a photo to treat like that and print for myself! :D
     
  8. mrmacedonian

    mrmacedonian TPF Noob!

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    Thanks! I love the eyes as well :)
     
  9. mrmacedonian

    mrmacedonian TPF Noob!

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    No one has any wisdom concerning an enlargement from 10x6.7 to 30x20? :-\

    Preference of program, workflow of steps, anything?
     
  10. Taylor510ce

    Taylor510ce TPF Noob!

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    for big enlargements many people use "genuine fractals" But if you can get 300dpi easily in photoshop without massive loss of quality then no need.

    Genuine Fractals 6 Professional Edition - onOne Software go to the features tab and look at the chart showing how big you can go.
     
  11. mrmacedonian

    mrmacedonian TPF Noob!

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    Well, the original photo was exported from Lightroom @350dpi/ppi, giving the above specifications. If I go into image size and just type in the 30x20 and select Bicubic it increases the size - the dpi doesn't change.

    it can't maintain a ppi of 350 @30x20 so its obviously using the bicubic linear algorithm to produce those pixels. I was expecting it to drop the ppi by 1/3 (~115ppi) instead of compensating by producing the pixels.

    any way, i'll give GFractlas a try thank you :D
     
  12. KmH

    KmH Helping photographers learn to fish Supporting Member

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    With pixel dimensions of 3520 x 2347 pixels the photo can be printed at 35.20" x 23.47" at 100 ppi and the photo already has a 3:2 aspect ratio, the same as a 30 x 20 print.

    A 30 x 20 print would normally be viewed from several feet away and 100 ppi could well be more than sufficient.

    A key would be the noise level in the image, plus the sharpening technique(s) and amount of sharpening done. Photos can be sharpened more for chromogenic printing than they can for monitor display or inkjet printing.

    If you are planning to upload to an online print lab like Mpix, they want the image file in the sRGB color space, JPEG file format, and no embedded color profiles. It is virtually impossible to see the difference between a TIFF and JPEG saved at a high quality setting.

    Mpix.com - Help - How To Prepare Your Images.
     

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