Interpolation Software

[ddibbley]

Can anyone recommend an interpolation software.
I have a 300mm sq. image @ 300dpi would like to enlarge to 4.5M, appox. 1500% although that would be full dpi which is not necessarily needed.
I'm running 10.6.8 (although could update to Yosemite) on a 2 x 2.26 GHz Quad Core Intel Xeon.
Many Thanks

 

[Exodist]

Can anyone recommend an interpolation software.
I have a 300mm sq. image @ 300dpi would like to enlarge to 4.5M, appox. 1500% although that would be full dpi which is not necessarily needed.
I'm running 10.6.8 (although could update to Yosemite) on a 2 x 2.26 GHz Quad Core Intel Xeon.
Many Thanks

So your image is about 3543 x 3543 pixels.

You don't need special software, just print larger. It will look like crap up close, but from a distance it will look fine. It will be about 20 dots per inch when you get done. Which is fine for billboards and large signs..

 

[ddibbley]

Thanks for the response.
I did try enlarging in Photoshop but quality was too poor/pixelated as it's for an internal wall.

Many Thanks

 

[Exodist]

Thanks for the response.
I did try enlarging in Photoshop but quality was too poor/pixelated as it's for an internal wall.

Many Thanks

Yep, this is why Medium Format Cameras are sold. Not only that, for something wall sized that you will be looking at "up close" i.e. at a Gallery.. You need about 80 to 100 mega pixels..

I have a few panorama photos that I took that large.
But safe bet is 20MP camera can produce a 36 x 24 inch photo without any major loss in detail.

 

[louishen]

You need about 72 dpi for large format prints, so that about 12756x12756 pixels

Up the resolution in photoshop

Then duplicate the images layer and set its blending mode to Overlay

Then apply the filter High Pass (in the other filters submenu) - experiment with the settings but between 6 and 10 pixels should do.

That will add some detail back into the image, but don't go too far

The Overlay and High pass filter does well with an image with some detail, but obviously will not magically turn a really low res image into a full hires image