Mercurial > pylearn
view image_tools.py @ 528:cfe3f62a08cb
bugfix, outputs needed to be in a list in the past, not anymore.
author | Frederic Bastien <bastienf@iro.umontreal.ca> |
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date | Mon, 17 Nov 2008 13:17:00 -0500 |
parents | d7ed780364b3 |
children |
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import numpy def make_weights_image(mat, xres, yres, i, j, nrow, ncol): """ Displays the filters implemented by a weight matrix. Each filter corresponds to a row of mat and will be represented by a xres*yres image. Units from i to j will be included in the picture. The picture will have nrow rows of filters and ncol columns of filters. Unused spots for filters will be filled with zeros. The return value is a matrix suitable for display with matplotlib's imshow. """ assert j > i n = j - i result = numpy.zeros((ncol * xres, nrow * yres)) submat = mat[i:j] for k, row in enumerate(submat): x = (k % ncol)*xres y = (k / ncol)*yres entry = row.reshape((xres, yres)) lmin, lmax = numpy.min(entry), numpy.max(entry) ldiff = lmax - lmin #entry = (entry - lmin) / ldiff result[x:x + xres, y:y + yres] = entry return result.T