On Fri, 2006-09-08 at 11:44 -0300, Rodrigo Renie Braga wrote: > Hello list > > I would like to know if there is a (easy) way to grab rgb information > of an image and then modify it with new rgb information... i'm making > an application to apply different set of filters on an image, and i > need to, basicly: > - load an image > - be able to grab the rgb information of a certain pixel > - make a new image with a different rgb (calculated by my algorithm) > - show that image to the user an then save it to a file > > what is the best way to work with rgb and image using pygtk?
You *can* access the pixel data of a GdkPixbuf with gtk.gdk.Pixbuf.get_pixels(), but that's very slow and painful. Better is to ensure that PyGtk is compiled with Numeric, and use gtk.gdk.Pixbuf.get_pixels_array() to get the pixel data (in RGB[A]) as a Numeric array. You can then apply array transforms to the array using Numeric. You then recreate a GdkPixbuf from the transformed array with gtk.gdk.pixbuf_new_from_array(), and save it with gtk.gdk.Pixbuf.save(). Ed _______________________________________________ pygtk mailing list [email protected] http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
