markus.proel...@ifm.com wrote: > > Hello, > > let's say I have given an image of distance values, which I display with > the jet colormap. Now if there are invalid pixels within the image they > have the value -1 or -2. Is there a way to display just the "valid" > image with the jet colorbar and the -1 pixels as white pixels and the -2 > pixels as black pixels?
See http://matplotlib.sourceforge.net/examples/pylab_examples/image_masked.html. You might need to use a masked array and mask the -2 values. Eric > > Till now I scale the image with vmin, vmax: > > >>> vmin = img[(img != -1) & (img != -2)].min() > >>> vmax = img[(img != -1) & (img != -2)].max() > >>> imshow(img, vmin=vmin, vmax=vmax, interpolation = 'nearest') > > But how can I now paint the black and white pixels? > > Regards, > > Markus > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------------ > Return on Information: > Google Enterprise Search pays you back > Get the facts. > http://p.sf.net/sfu/google-dev2dev > > > ------------------------------------------------------------------------ > > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users ------------------------------------------------------------------------------ Return on Information: Google Enterprise Search pays you back Get the facts. http://p.sf.net/sfu/google-dev2dev _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
