180 or 360 ppi?

I print my fine art prints with Image Print, an excellent RIP.  And I print on an Epson 4800.  Image Print gives you the option of printing at 180 or 360 ppi.  I’ve printed a lot of great looking, rather large photographs at 180 ppi.  A lot of my friends are shocked.  They say I’m compromising the quality of the print.  But no matter how close I scrutinize the prints I really can’t see any difference.

Enter Genuine Fractals.  Genuine Fractals really objects if you try to resize an image to 180 ppi.  The smallest it is comfortable going is 240.  To get it to accept 180 ppi I have to fake it out. 

But the fact that it defaults ot 240 raises all sorts of questions.  What if I resize at 240 ppi and print at 180 or 360?  For that matter, is there a difference between 180 and 360.  So the other day I was printing some 16X24 images and decided it was time to finally ran a test. 

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Genuine Fractals Impressions #4

I just ran another test on Genuine Fractals.  Here it is.

I’m working on an image for the Orange County Fair and I want to blow it up to 16X24.  It is Kolob Terrace taken with my 10D last year in Zion so the image size is 3072X2048 or 6 M pixels.

I use Image Print to make my prints on my Epson Stylus Pro 4800.  Image Print likes to print at two PPI settings – 180 and 360.  So here is the question: Can I get the same degree of sharpness with Genuine Fractals at 360 PPI as I can get with 180 PPI?

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Genuine Fractals Impressions #3

I finally had a chance to perform a test with Genuine Fractals that’s been on my mind for some time.  This test was performed on an image from a Canon 10D with a 6 M pixel sensor.  The image was blown up to 24″ long at 180 ppi.

Now, there’s no way you can get a super sharp image of that size with a 6 M pixel sensor.  So that wasn’t the point of the test.  When I previously blew this image up there were a lot of artifacts that were enhanced, especially when I performed the output sharpening.  I spent about an hour with clone stamp and healing brush removing these artifacts one by one.

So the point of the test was to see how well the smooth areas were enlarged; that is, if GF could enlarge them without creating these artifacts.

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Genuine Fractals Impressions #1

Improve your photography skills, stimulate your creativity and have a fantastic time.

I picked up Genuine Fractals by onOne software this weekend.  What does it do?  It allows you to upscale your digital images.    And just what is upscaling?  It comes down to adding pixels to your image to make it larger.  Whenever you add pixels you have a problem.  What color and intensity should the new pixels be?

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