http://code.activestate.com/recipes/tags/image_processing/views/2016-07-31T22:50:28-07:00ActiveState Code Recipes2015-01-03T03:39:34-08:00FB36http://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>

2016-07-31T22:50:28-07:00FB36http://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>

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>

2010-04-13T07:06:09-07:00Rahul Anandhttp://code.activestate.com/recipes/users/4173646/http://code.activestate.com/recipes/577189-mass-image-resizing-with-progress-bar-and-details-/

<p style="color: grey"> Python recipe 577189 by <a href="/recipes/users/4173646/">Rahul Anand</a> (<a href="/recipes/tags/images/">images</a>, <a href="/recipes/tags/image_processing/">image_processing</a>, <a href="/recipes/tags/python/">python</a>). Revision 2. </p> <p>This script uses the Python Imaging libraries to resize images in a folder and its sub-folders iteratively. The details like the directory hierarchy, current progress etc are displayed dynamically. We can optionally specify more image formats, required size etc.(See command-line argument --help). This is meant for processing large collections of images, which justifies the display of many details.</p>

2014-01-15T22:45:11-08:00Vasudev Ramhttp://code.activestate.com/recipes/users/4173351/http://code.activestate.com/recipes/578811-using-pngcanvas-a-pure-python-png-library/

<p style="color: grey"> Python recipe 578811 by <a href="/recipes/users/4173351/">Vasudev Ram</a> (<a href="/recipes/tags/image_processing/">image_processing</a>, <a href="/recipes/tags/imaging/">imaging</a>, <a href="/recipes/tags/png/">png</a>, <a href="/recipes/tags/pngcanvas/">pngcanvas</a>, <a href="/recipes/tags/python/">python</a>). </p> <p>This recipe shows a simple example of how to use pngcanvas, a pure Python library for PNG image creation.</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>