There are currently two PEPs related to this kind of problem. One is lead by Travis Oliphant of numpy and is about establishing a buffer protocol for data interchange. The second one is specifically related to passing image data between applications/toolkits.
http://www.python.org/dev/peps/pep-3118/ http://www.python.org/dev/peps/pep-0368/ So I guess in the near future we will get rid of string conversions. Carlos On Wed, Feb 27, 2008 at 6:23 AM, Frédéric Mantegazza <[EMAIL PROTECTED]> wrote: > On mardi 26 février 2008, Joao S. O. Bueno wrote: > > > On Thu 21 Feb 2008 05:47:22 Sahar Vilan wrote: > > > > Can anyone help me with transformation from numpy array to image (at > > > PIL library)? > > > I want to change an array (at numpy) into an image (at Image) in order > > > to rotate the image and save it in standard image format. > > > > > Sorry for the long delay. > > These convertions in python among data and image representation indeed > > require some experimentation. > > > > (In my todo list, wiht low priority, I have a python module that would > > seamlessly translate image data across various image handling > > bindings/ibraries and numerical types). > > > > Fortunatey, in this case it is rather simple: > > > > For numpy.array -> python image, you do something like: > > > > a = numpy.array ("\x0" (WIDTH * HEIGHT * 3), "B") > > #code to create imag data inside array > > # (...) > > i = Image.new("RGB", (WIDTH, HEIGHT)) > > > > i.fromstring(a.tostring()) > > i.save(filename) > > Hello, > > I'm also very interested by such features, because I think it could be a > nice way to use color management libraries. For example, the little cms > python wrapper could handle arrays (which it does not yet), and then, PIL > could convert image from/to arrays. > > > i.fromstring(a.tostring()) > > What is the performances of such transformations? > > -- > Frédéric > > http://www.gbiloba.org > > > _______________________________________________ > Image-SIG maillist - Image-SIG@python.org > http://mail.python.org/mailman/listinfo/image-sig > _______________________________________________ Image-SIG maillist - Image-SIG@python.org http://mail.python.org/mailman/listinfo/image-sig
