John Hunter schrieb: > On Mon, Jun 9, 2008 at 10:18 AM, > > >> I attached a patch against the current svn version that adds a 'resample' >> argument to imshow. Additionally, this patch supports a 'image.resample' >> entry in the rc file. Setting this to false (default), the behaviour is >> unchanged. >> > > Hi Gregor -- thanks for sending this. It's something I was aware of > in agg but never got around to exposing. I wonder if the > resample=True|False is the right approach. It might be nice for > imshow to have an 'auto' mode to either resample or interpolate > depending on the image dimensions w/ respect to the destination size. > Ie, if we are displaying the full image into a small destination, > 'auto' would default to resample. If we zoom in sufficiently, the > image might be best displayed with interpolation. Is this something > you think would be worthwhile and would you like to work on support > for this? > If I understood it correctly, Agg (i.e., span_image_resample_*) already exactly behaves like you proposed. It resamples the image if the scaling is less than 1, otherwise it interpolates.
> Also,l I notice the patch exposes span_image_resample_rgba_affine but not > span_image_resample_rgba which takes an interpolator template > argument. I know very little about this area, but was this a > conscious choice or one of expediency? Can you explain the rational? > > I am not an Agg expert. The documentation of Agg is not very exhaustive. I took it from one of the demos. span_image_resample_rgba_affine seems to be faster than span_image_resample_rgba, but it supports affine but no perspective transformations. If I understood it correctly, matplotlib only uses image translation and scaling, not even rotation or shearing. All this is covered by span_image_resample_rgba_affine. Gregor ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
