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SF.net SVN: matplotlib: [5308] trunk/matplotlib
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From: <jd...@us...> - 2008-05-29 20:29:55
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Revision: 5308
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=5308&view=rev
Author: jdh2358
Date: 2008-05-29 13:29:54 -0700 (Thu, 29 May 2008)
Log Message:
-----------
Merged revisions 5304-5306 via svnmerge from
https://matplotlib.svn.sourceforge.net/svnroot/matplotlib/branches/v0_91_maint
........
r5304 | jdh2358 | 2008-05-29 13:25:15 -0500 (Thu, 29 May 2008) | 1 line
added clippath support for ps
........
r5305 | jdh2358 | 2008-05-29 13:25:58 -0500 (Thu, 29 May 2008) | 1 line
added clippath support for ps
........
r5306 | jdh2358 | 2008-05-29 15:17:32 -0500 (Thu, 29 May 2008) | 1 line
imread via pil now returns lumininance or rgb if possible
........
Modified Paths:
--------------
trunk/matplotlib/API_CHANGES
trunk/matplotlib/CHANGELOG
trunk/matplotlib/examples/pylab/image_demo3.py
trunk/matplotlib/lib/matplotlib/image.py
Property Changed:
----------------
trunk/matplotlib/
Property changes on: trunk/matplotlib
___________________________________________________________________
Name: svnmerge-integrated
- /branches/v0_91_maint:1-5299
+ /branches/v0_91_maint:1-5307
Modified: trunk/matplotlib/API_CHANGES
===================================================================
--- trunk/matplotlib/API_CHANGES 2008-05-29 20:18:41 UTC (rev 5307)
+++ trunk/matplotlib/API_CHANGES 2008-05-29 20:29:54 UTC (rev 5308)
@@ -1,4 +1,8 @@
+ matplotlib.image.imread now no longer always returns RGBA -- if
+ the image is luminance or RGB, it will return a MxN or MxNx3 array
+ if possible. Also uint8 is no longer always forced to float.
+
Rewrote the cm.ScalarMappable callback infrastructure to use
cbook.CallbackRegistry rather than custom callback handling. Amy
users of add_observer/notify of the cm.ScalarMappable should uae
@@ -197,6 +201,9 @@
END OF TRANSFORMS REFACTORING
+
+
+
0.91.2 Released
For csv2rec, checkrows=0 is the new default indicating all rows
Modified: trunk/matplotlib/CHANGELOG
===================================================================
--- trunk/matplotlib/CHANGELOG 2008-05-29 20:18:41 UTC (rev 5307)
+++ trunk/matplotlib/CHANGELOG 2008-05-29 20:29:54 UTC (rev 5308)
@@ -1,3 +1,10 @@
+2008-05-29 matplotlib.image.imread now no longer always returns RGBA
+ -- if the image is luminance or RGB, it will return a MxN
+ or MxNx3 array if possible. Also uint8 is no longer always
+ forced to float.
+
+2008-05-29 Implement path clipping in PS backend - JDH
+
2008-05-29 Fixed two bugs in texmanager.py:
improved comparison of dvipng versions
fixed a bug introduced when get_grey method was added
Modified: trunk/matplotlib/examples/pylab/image_demo3.py
===================================================================
--- trunk/matplotlib/examples/pylab/image_demo3.py 2008-05-29 20:18:41 UTC (rev 5307)
+++ trunk/matplotlib/examples/pylab/image_demo3.py 2008-05-29 20:29:54 UTC (rev 5308)
@@ -3,14 +3,15 @@
try:
import Image
except ImportError, exc:
- raise SystemExit("PIL must be loaded to run this example")
+ raise SystemExit("PIL must be installed to run this example")
lena = Image.open('../data/lena.jpg')
dpi = rcParams['figure.dpi']
figsize = lena.size[0]/dpi, lena.size[1]/dpi
figure(figsize=figsize)
-
+ax = axes([0,0,1,1], frameon=False)
+ax.set_axis_off()
im = imshow(lena, origin='lower')
#savefig('image_demo3')
Modified: trunk/matplotlib/lib/matplotlib/image.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/image.py 2008-05-29 20:18:41 UTC (rev 5307)
+++ trunk/matplotlib/lib/matplotlib/image.py 2008-05-29 20:29:54 UTC (rev 5308)
@@ -650,11 +650,15 @@
"""
return image file in fname as numpy array
- Return value is a MxNx4 array of 0-1 normalized floats
+ return value is a numpy array. For grayscale images, the return
+ array is MxN. For RGB images, the return value is MxNx3. For
+ RGBA images the return value is MxNx4
matplotlib can only read PNGs natively, but if PIL is installed,
- it will use it to load the image and return an RGBA if possible
+ it will use it to load the image and return an array (if possible)
which can be used with imshow
+
+ TODO: support RGB and grayscale return values in _image.readpng
"""
def pilread():
@@ -682,15 +686,39 @@
def pil_to_array( pilImage ):
+ """
+ load a PIL image and return it as a numpy array of uint8. For
+ grayscale images, the return array is MxN. For RGB images, the
+ return value is MxNx3. For RGBA images the return value is MxNx4
+ """
+ def toarray(im)
+ 'return a 1D array of floats'
+ x_str = im.tostring('raw',im.mode,0,-1)
+ x = np.fromstring(x_str,np.uint8)
+ return x
+
if pilImage.mode in ('RGBA', 'RGBX'):
- im = pilImage # no need to convert images in rgba format
+ im = pilImage # no need to convert images
+ elif pilImage.mode=='L':
+ im = pilImage # no need to luminance images
+ # return MxN luminance array
+ x = toarray(im)
+ x.shape = im.size[1], im.size[0]
+ return x
+ elif pilImage.mode=='RGB':
+ #return MxNx3 RGB array
+ im = pilImage # no need to RGB images
+ x = toarray(im)
+ x.shape = im.size[1], im.size[0], 3
+ return x
+
else: # try to convert to an rgba image
try:
im = pilImage.convert('RGBA')
except ValueError:
raise RuntimeError('Unknown image mode')
- x_str = im.tostring('raw',im.mode,0,-1)
- x = np.fromstring(x_str,np.uint8)
+ # return MxNx4 RGBA array
+ x = toarray(im)
x.shape = im.size[1], im.size[0], 4
return x
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