http://code.activestate.com/recipes/tags/image_processing-python/2016-07-31T22:50:28-07:00ActiveState Code Recipes2016-07-31T22:50:28-07:00FB36http://code.activestate.com/recipes/users/4172570/http://code.activestate.com/recipes/580695-image-projection-onto-sphere/

<p style="color: grey"> Python recipe 580695 by <a href="/recipes/users/4172570/">FB36</a> (<a href="/recipes/tags/graphics/">graphics</a>, <a href="/recipes/tags/image/">image</a>, <a href="/recipes/tags/images/">images</a>, <a href="/recipes/tags/image_processing/">image_processing</a>, <a href="/recipes/tags/imaging/">imaging</a>, <a href="/recipes/tags/math/">math</a>, <a href="/recipes/tags/mathematics/">mathematics</a>, <a href="/recipes/tags/pil/">pil</a>). </p> <p>Image projection onto sphere using Equirectangular map projection.</p> <p>Download the test image from the Wikipedia page!</p>

2015-01-03T03:39:34-08:00FB36http://code.activestate.com/recipes/users/4172570/http://code.activestate.com/recipes/578997-2d-discrete-fourier-transform/

<p style="color: grey"> Python recipe 578997 by <a href="/recipes/users/4172570/">FB36</a> (<a href="/recipes/tags/image/">image</a>, <a href="/recipes/tags/images/">images</a>, <a href="/recipes/tags/image_processing/">image_processing</a>, <a href="/recipes/tags/math/">math</a>, <a href="/recipes/tags/mathematics/">mathematics</a>, <a href="/recipes/tags/signal_processing/">signal_processing</a>). </p> <p>2D Discrete Fourier Transform (DFT) and its inverse.</p> <p>Calculates 2D DFT of an image and recreates the image using inverse 2D DFT.</p> <p>Computation is slow so only suitable for thumbnail size images.</p>

2014-03-25T10:17:07-07:00Alfehttp://code.activestate.com/recipes/users/4182236/http://code.activestate.com/recipes/578857-gimp-paperwhite-scriptfu/

<p style="color: grey"> Python recipe 578857 by <a href="/recipes/users/4182236/">Alfe</a> (<a href="/recipes/tags/gimp/">gimp</a>, <a href="/recipes/tags/image_processing/">image_processing</a>, <a href="/recipes/tags/paperwhite/">paperwhite</a>, <a href="/recipes/tags/plugin/">plugin</a>, <a href="/recipes/tags/script/">script</a>, <a href="/recipes/tags/scriptfu/">scriptfu</a>). </p> <p>This Gimp-plugin (written in Python) changes a photograph of a paper document so that the paper background appears white again without overly lighting the text.</p>

2009-06-20T18:05:08-07:00hasanatkazmihttp://code.activestate.com/recipes/users/4168973/http://code.activestate.com/recipes/576818-putting-watermark-to-images-in-batch/

<p style="color: grey"> Python recipe 576818 by <a href="/recipes/users/4168973/">hasanatkazmi</a> (<a href="/recipes/tags/batch/">batch</a>, <a href="/recipes/tags/image_processing/">image_processing</a>, <a href="/recipes/tags/pil/">pil</a>, <a href="/recipes/tags/watermark/">watermark</a>). </p> <p>Being a novice photographer, I usually have many pictures - sometimes in hundreds. While posting on Flickr or other online sources, it is very important to put watermark on all of them, like signature or email. This is a small self explanatory snippet which will place watermark image on right bottom corner. You just provide source folder and it will scan all photos in that folder (not sub folders) and will produce watermarked photos in the destination folder. It worked for me with jpg, it should work for all those formats which PIL can work with.</p>