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Thread: Large blowups from 1.6x format...

  1. #1
    rpcrowe's Avatar
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    Large blowups from 1.6x format...

    I am sure that there have been threads on this subject but, I could not find any.

    I know that there is a way to gradually enlarge images using Photoshop CS5 to obtain the largest possible prints with the best definition and quality. I once read a technique that enlarged the images in gradual stages with sharpening interspersed.

    If anyone knows of this procedure or can direct me to information regarding the process, I would appreciate it.

    Oh yes, I want to enlarge images of Yosemite National Park, California shot, tripod mounted, with a 40D and top-line lenses such as the 24-70mm f/2.8L and 70-200mm f/4L IS. I want to have some of these images printed on canvas. COSTCO discount store has a good deal on canvas prints...

  2. #2
    arith's Avatar
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    Re: Large blowups from 1.6x format...

    This might be good Richard.

    http://www.imagener.com/

    But I use Helicon Filter which goes up to about 20" on presets using a modern algorith called the Mitchell method.

  3. #3

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    Have a guess :)

    Re: Large blowups from 1.6x format...

    Hi Richard,

    I do this all the time (typically 22 x 44").

    If you feel the need for up-sampling, just do it all in 1 hit, and sharpen afterwards (typically 40% @ 4 pixel). My experience upsampling incrementally is (a) it doesn't add any meaningful detail, and (b) it can exaggerate/distort some detail.

    In extreme cases, Genuine Fractals is generally considered to be the best; I used it once to up-sample an image shot at VGA resolution (640 x 480) (when we had to also heavily crop) in to a 22 x 15" canvas) -- was still a very soft result though, that looked "sb-optimal) at viewing distances less than about 5 feet.

  4. #4
    Black Pearl's Avatar
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    Re: Large blowups from 1.6x format...

    You shouldn't need to upscale the 40D is good enough for huge enlargements and canvas prints don't hold super fine detail like a paper print will.

  5. #5
    rpcrowe's Avatar
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    Re: Large blowups from 1.6x format...

    Thank you my friends. I promised my darling wife to get a large canvas for the hallway wall. When she wants something photographically, I always put that on top priority. That way, there are no complaints when I want to buy a new piece of photo gear.

  6. #6
    mythlady's Avatar
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    Elise

    Re: Large blowups from 1.6x format...

    Gotta love a man who knows how to keep his wife happy (and keep himself in new equipment) . . .

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