filterizer

filterizer copied to clipboard

• Filterizer

** Intro Using this code, you can start creating your own image filters like the ones you see in apps like Instagram, Hipstamatic etc.

What you need is Python, and some curve files. To get you started there is already a sample curve file ( Country.acv ) inside the repo.

Curve files are some special Photoshop files that alter the appearance of the image. You can find lots of them for free, and there is no need to have Photoshop installed in order to create filters from them.

For an example of what can be done with =.acv= files take a look at the following presets [[http://www.digitalfilmactions.com/photoshop-curves/][sample photoshop curves]].

** Photoshop curve files

The code reads a =.acv= file and outputs the polynomials that adjust the colours of an image. There polynomials can then be used to produce filters for images in every language you prefer.

[[https://www.adobe.com/devnet-apps/photoshop/fileformatashtml/PhotoshopFileFormats.htm#50577411_pgfId-1056330][Curve file specification from Adobe]]

** Usage

Using the =extractCurvesFromACVFile.py= Python code, you can extract the polynomials you need, and then you can use them in your code to alter the image.

** Sample filtering output

[[surrey.png]][[surrey_filtered.png]]

** iOS example There is also an example included on how to use a curve extracted from an =.acv= file in objective-C. Warning: The iPhone code is slow and unoptimized. It is mainly intented as a proof of concept.

** Python filtering example Github user [[https://github.com/pfdevilliers][@pfdevilliers]] has wrapped together a nice python script using the curve reading code above. Take a look [[https://github.com/pfdevilliers/python-image-filters][here]].