Want a tutorial on expanding an images ppi and minimising jaggies

I've been looking online for an up to date method. It's a while since I've had to do this, upsizing a photographic image. It was shot RAW so jpg compression squares is not the issue here. Just getting more pixels out of it for print job. Any links?
I'm not looking for tutorials in how to make a 110% resize action! Nor a link to a paid product that is 110% resize actions for any given enlargement. All I found i last ten minutes online was this kind of out of date rubbish. While I know in same cases, like designing billboard movie posters finished artists go to the extent of painting out film grain with the wacom, I'm not looking to go that far. More judicious use of filters and unsharpened mask.
I read once an Adobe engineer say that standard bi-cubic (introduced in CS2/3?) resize is more effective than step-enlarging with any of the algorithms. I haven't found that to be false so far, any opinions.

Marian Driscoll wrote:
wideEyedPupil wrote:
And I had searched btw.
If that were true, you'd probably have found my previous references to Smilla.
At the risk of re-flaming the dying embers: That's a false positive. :\ </light-hearted-tone>
Searching forums as you probably [] know is virtually (when not literally) non-deterministic and there often is a high noise-to-signal ratio. My search may have been poor and quick (as in 5 tokens and about 10 minutes) but a search it was. I didn't think to search for Smilla . I actually find the Adobe forums search difficult — even these new improved forums. When I search 'Smilla' for instance, I get 3 hits forum-wide.It has taken me 40 minutes of searching to find out sub-sets of forums must all be (shift-click) selected in filtered searches. So a search of "Adobe Photoshop" results in zero hits on all the search tokens it tried. That's not in the search tips either. For the occasional user these forums have a pretty average interface I think (although big improvement on the previous ones which were woeful).
I used to answer a lot of Q on Apple discussions and always found it weird when others would get aggressive about somebody having not consulted the manual or searched the forum properly, it's like okay, ignore the question, but don't react with anger, respond graciously or not at all, am I right?
Anyhow you've provided some useful open source software to the world so I don't want to give you a hard time about nuances. Thanks again.
Having trouble getting the right balance between flat and dithering/noise with Similla btw, but I'm persevering. It definitely gives different results to Resize BiCubic, probably would need to see printed output to call which way to go is preferable in any given instance as I'm not experienced enough in pre-press to tell. I read the user guide, do you have any other commentary on good Similla technique?

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Visit the Fairchild Imaging Website for details on the company and the products. Fairchild Imaging makes a wide spectrum of cameras including Aerospace, scientific and medical and Fairchild Imaging has been producing CCDs since 1975. Our cameras range in pixels size from below 1meg to over 81 meg with pixels down to 8.75u. One of our CCDs was used in the Deep Impact project where a camera was fired into a comet which is one of many interesting projects.
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Mario Arizmendi wrote:
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//    http://www.pictrix.jp/   Umezawa
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hi
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Want a tutorial on expanding an images ppi and minimising jaggies

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