Wand Lightning Talk

Introduction to Wand, a ctypes-based simple ImageMagick binding for Python. You can find the original of the presentation in this link: http://j.mp/pykr2012-wand

Transcript

1. Hong Minhee Wand
3. Speaker: Hong Minhee http://dahlia.kr/ https://github.com/dahlia https://bitbucket.org/dahlia @hongminhee
4. Speaker: Hong Minhee Hobbyist programmer since 1999 Python programmer since 2005 PyPy enthusiast Anti-fan of Django StyleShare (2011–2012)
5. https://stylesha.re/
6. Speaker: Hong Minhee Hobbyist programmer since 1999 Python programmer since 2005 PyPy enthusiast Anti-fan of Django StyleShare (2011–2012) Crosspop (2012–)
7. http://crosspop.in/
8. Wand: Short introduction Image Processing Library Built on top of ImageMagick Modern PythonicTM API Supports CPython 2.6+, PyPy☆, Jython (soon) Well Documented Properly Packaged MIT Licensed Competitior of Python Imaging Library (PIL)
9. Too many ImageMagick bindings PyPI Docs PyPy Update PythonMagick ☹ ☹ ☹ 2012-10 PythonMagickWand Achim Domma ☺ ☹ ☹ 2008-07 PythonMagickWand Ian Stevens ☹ ☹ ☹ 2009-01 python-magickwand Benjamin Schweizer ☺ ☹ ☹ 2012-01 magickwand Oliver Berger ☺ ☹ ☹ 2010-06 Wand ☺ ☺ ☺ 2012-11
10. Install $ pip install Wand $ easy_install Wand
11. ImageMagick $ apt-get install libmagickwand-dev $ yum install ImageMagick-devel http://dahlia.kr/wand/guide/install.html
12. try+finally < with from wand.image import Image try: image = Image(width=480, height=320) assert image.size == (480, 320) image.save(filename='transparent-480x320.jpg') finally: image.close()
13. try+finally < with from wand.image import Image with Image(width=480, height=320) as image: assert image.size == (480, 320) image.save(filename='transparent-480x320.jpg')
14. try+finally < with from wand.color import Color from wand.image import Image with Color('white') as bg: with Image(width=480, height=320, background=bg) as i: assert i.size == (480, 320) i.save(filename='white-480x320.jpg')
15. Converting from urllib2 import urlopen from wand.image import Image with Image(file=urlopen('http://j.mp/wand-iu-1')) as i: assert i.format == 'jpeg' with i.convert('png') as png: png.save(filename='wand-iu-1.png')
16. Resizing
17. Resizing from urllib2 import urlopen from wand.image import Image with Image(file=urlopen('http://j.mp/wand-iu-1')) as i: i.save(filename='wand-iu-1.jpg') assert i.size == (1200, 800) i.resize(480, 320) i.save(filename='resized.jpg')
18. Resizing
19. Cropping
20. Cropping from urllib2 import urlopen from wand.image import Image with Image(file=urlopen('http://j.mp/wand-iu-2')) as image: image.save(filename='wand-iu-2.jpg') assert image.size == (720, 887) with image[:230, :] as cropped: cropped.save(filename='cropped.jpg')
21. Cropping
22. Cropping
23. 0.3 will be soon It will include: • Python 3 compatibility • Drawing • Sequences • EXIF • Seam carving • Channels • and so on http://dahlia.kr/wand/roadmap.html
24. Seam carving
25. Seam carving from urllib2 import urlopen from wand.image import Image with Image(file=urlopen('http://j.mp/wand-iu-3')) as i: i.save(filename='wand-iu-3.jpg') assert i.size == (1280, 1710) i.liquid_rescale(1280, 1500) i.save(filename='seam-carving.jpg')
26. Seam carving
27. Seam carving
28. Further reading http://dahlia.kr/wand/
29. Fork/pull request https://github.com/dahlia/wand
30. Discussion wand@librelist.com http://librelist.com/browser/wand/
31. Talk permalink http://j.mp/pykr2012-wand