So I think the change I suggested takes care of the floating point case, except that the vmin and vmax values don't default to 0.0 and 1.0. I wonder whether this is enough of a surprise to warrant some logic to set vmin and vmax in some cases, such as iff all array values are floats in the range 0.0-1.0 and neither vmin nor vmax have been specified as arguments, then use vmin=0.0 and vmax=1.0. Should we aim to replicate the scipy imsave behaviour exactly? Another possible problem with the current behaviour is that single bit plane arrays currently get saved as RGB - I don't know if this can be changed easily.
Gary Stéfan van der Walt wrote: > Hi Gary > > Sorry, I didn't even read the docstring since I have been using > SciPy's "imsave" so far. > > 2009/11/8 Gary Ruben <gru...@bigpond.net.au>: >> This may be all you need. My tests (in the attached test.py) appear to >> work. However, I don't think it's what you want. By default, figimage >> even expects NxMx3 and NxMx4 arrays to be float arrays nominally ranging >> from 0-1. What you probably want is a raw RGB mapping where pixel planes >> are unsigned 8 bit values. I thought calling figimage with a >> norm=no_norm(0,255) instance achieved this but it doesn't work as I >> expect. So the first question is, what is the expected behaviour here, >> and a follow-up is does anyone here understand how to do the colour >> mapping to achieve it? > > We assume that arrays of dtype uint8 represent intensities 0 through > 255, and that floating point arrays are between 0-1. > > Regards > Stéfan > ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
