I do not believe that there is some kind of api that will apply ancient filters, such as Instagram and Pixlromatic.
Your best bet is a javascript image processing library called CamanJS. ( http://camanjs.com ) It looks like you can use it with NodeJS to edit and even record new images. It also has some amazing instagram style filters. ( http://camanjs.com/examples/ )
And also a great ImageMagick tool that will handle photos for you. I had successful processing of user-uploaded photos in PHP and Ruby-on-Rails (using rMagick). I am sure that it works with other languages. You will need to write your own processing procedures in order to get this βvintageβ effect, but it is probably possible.
For Ruby: http://rmagick.rubyforge.org/portfolio.html For PHP: http://php.net/manual/en/book.imagick.php
You can also wait and hope that instagram will change its mind about downloading api.
Ryan epp
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