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The image module supports basic image loading, rescaling and display
operations.
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interpolation and cmap default to their rc settings
cmap is a colors.Colormap instance
norm is a colors.Normalize instance to map luminance to 0-1
extent is data axes (left, right, bottom, top) for making image plots
registered with data plots. Default is to label the pixel
centers with the zero-based row and column indices.
Additional kwargs are matplotlib.artist properties
s image.originN( t martistt Artistt __init__t cmt ScalarMappablet NoneR t origint set_filternormt
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c C s, | j d k r t d � � n | j j d S( s+ Get the numrows, numcols of the input images" You must first set the image arrayi N( t _AR$ t RuntimeErrort shape( R ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyt get_sizel s c C s t j j | | � d | _ d S( sw
Set the alpha value used for blending - not supported on
all backends
ACCEPTS: float
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Call this whenever the mappable is changed so observers can
update state
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convert numpy array A with given extents ([x1, x2, y1, y2] in
data coordinate) into the Image, given the vielim (should be a
bbox instance). Image will be clipped if the extents is
significantly larger than the viewlim.
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Retuen a transform that does
(x1, y1) -> (x1, y1)
(x2, y2) -> (x2, y2)
(x2, y1) -> (x3, y3)
It was intended to derive a skew transform that preserve the
lower-left corner (x1, y1) and top-right corner(x2,y2), but
change the the lower-right-corner(x2, y1) to a new position
(x3, y3).
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draw unsampled image. The renderer should support a draw_image method
with scale parameter.
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return True if the image is better to be drawn unsampled.
The derived class needs to override it.
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Test whether the mouse event occured within the image.
N( t callablet _containst xdatat ydataR� R$ RS ( R t
mouseeventRp t yR] R^ R_ R` t inside( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyt containsi s 3c C s� | j � } | d k r d S| r^ | j � \ } } | j � | j d � | j | | � n | j � | j � \ } } } t j | | | | � d S( s& Write the image to png file with fnameNi (
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Set the image array
ACCEPTS: numpy/PIL Image A
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retained for backwards compatibility - use set_data instead
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Return the interpolation method the image uses when resizing.
One of 'nearest', 'bilinear', 'bicubic', 'spline16', 'spline36', 'hanning',
'hamming', 'hermite', 'kaiser', 'quadric', 'catrom', 'gaussian',
'bessel', 'mitchell', 'sinc', 'lanczos',
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Set the interpolation method the image uses when resizing.
ACCEPTS: ['nearest' | 'bilinear' | 'bicubic' | 'spline16' |
'spline36' | 'hanning' | 'hamming' | 'hermite' | 'kaiser' |
'quadric' | 'catrom' | 'gaussian' | 'bessel' | 'mitchell' |
'sinc' | 'lanczos' | ]
s image.interpolations Illegal interpolation stringN( R$ R t lowert _interpdt
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set whether or not image resampling is used
ACCEPTS: True|False
s image.resampleN( R$ R t _resample( R t v( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR* � s
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Set whether the resize filter norms the weights -- see
help for imshow
ACCEPTS: 0 or 1
i i N( t _filternorm( R R2 ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR& � s c C s | j S( s return the filternorm setting( R� ( R ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyt get_filternorm� s c C s t | � } | | _ d S( s�
Set the resize filter radius only applicable to some
interpolation schemes -- see help for imshow
ACCEPTS: positive float
N( R� R( ( R R3 t r( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR' � s c C s | j S( s return the filterrad setting( R( ( R ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyt
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interpolation and cmap default to their rc settings
cmap is a colors.Colormap instance
norm is a colors.Normalize instance to map luminance to 0-1
extent is data axes (left, right, bottom, top) for making image plots
registered with data plots. Default is to label the pixel
centers with the zero-based row and column indices.
Additional kwargs are matplotlib.artist properties
R/ R0 R1 R% R2 R3 R4 N( t _extentR R! ( R R. R/ R0 R1 R% t extentR2 R3 R4 R5 ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR! � s g �?c " C s� | j d k r t d � � n | j � \ } } } } | j � } | j t j | | f | | f g � � } | d \ } } | d \ }
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return True if the image is better to be drawn unsampled.
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extent is data axes (left, right, bottom, top) for making image plots
This updates ax.dataLim, and, if autoscaling, sets viewLim
to tightly fit the image, regardless of dataLim. Autoscaling
state is not changed, so following this with ax.autoscale_view
will redo the autoscaling in accord with dataLim.
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c C sq | j d k r | j S| j � } | \ } } | j d k rU d | d | d d f Sd | d d | d f Sd S( s. get the image extent: left, right, bottom, topR@ g �g �?N( R R$ R9 R% ( R t szRe Rf ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR� ~ s N(
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kwargs are identical to those for AxesImage, except
that 'interpolation' defaults to 'nearest'
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return False. Do not use unsampled image.
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Set the grid for the pixel centers, and the pixel values.
*x* and *y* are 1-D ndarrays of lengths N and M, respectively,
specifying pixel centers
*A* is an (M,N) ndarray or masked array of values to be
colormapped, or a (M,N,3) RGB array, or a (M,N,4) RGBA
array.
i i i s Axes don't match array shapei s Can only plot 2D or 3D datai s? 3D arrays must have three (RGB) or four (RGBA) color componentsi� N( i i ( i i i ( RN t asarrayt float32R� R� RP R8 R� RM RO R/ R0 t astypeRX RT t repeatt newaxisR& t zerosR t listRS R6 R4 R5 R$ R+ RK RL ( R Rp R� RZ t B( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR� � sB **(((1 /% c G s t d � � d S( Ns Method not supported( t NotImplementedError( R R� ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR� � s c C s; | d k r' | d k r' t d � � n t j | | � d S( NR R s? Only nearest neighbor and bilinear interpolations are supported( s nearests bilinear( R$ R@ R R) ( R R� ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR) � s c C sJ | j d k r t d � � n | j d | j d | j d | j d f S( Ns Must set data firsti i����( R6 R$ R7 R4 R5 ( R ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR� � s c C s d S( N( ( R R� ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR& � s c C s d S( N( ( R R� ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR' � s c C s5 | j d k r t d � � n t j j | | � d S( Ns' Cannot change colors after loading data( R6 R$ R7 R" R# t set_norm( R R0 ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyRA � s c C s5 | j d k r t d � � n t j j | | � d S( Ns' Cannot change colors after loading data( R6 R$ R7 R" R# t set_cmap( R R/ ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyRB � s (
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Make a pcolor-style plot with an irregular rectangular grid.
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and it is used by pcolorfast for the corresponding grid type.
c K s\ t j j | � t j j | | | � | | _ d | _ | j | � | j | | | � d S( s�
cmap defaults to its rc setting
cmap is a colors.Colormap instance
norm is a colors.Normalize instance to map luminance to 0-1
Additional kwargs are matplotlib.artist properties
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Ni i RM i s Axes don't match array shapei s A must be 2D or 3Di s+ 3D arrays must have RGB or RGBA as last dimR� ( i i ( i i ( R� R� R$ RN t arangeR8 t float64R8 t ravelt sizeR� R� RS RT t allR& R6 R4 R5 t update_dict( R Rp R� RZ ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR� K s4 ) )'" � c G s t d � � d S( Ns Method not supported( R@ ( R R� ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR� k s c C s$ t j j | | � t | j d <d S( sw
Set the alpha value used for blending - not supported on
all backends
ACCEPTS: float
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R R R! R" R# R$ R R% t figuret oxt oyR- R> ( R t figR/ R0 t offsetxt offsetyR% R5 ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR! z s
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Set the image array
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Deprecated; use set_data for consistency with other image types.
N( R� ( R RZ ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR� � s g �?c C s9 | j d k r t d � � n | j | j | j � } | | _ | d k } | rZ d } n d } t j | | � } | j j � } | j
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j d k o� t | j j � d k | _ | r| j � \ } } | | 9} | | 9} | j t j � | j | | � n | j d k r5| j � n | S( Ns" You must first set the image arrayi i t grayi R@ ( R6 R$ R7 RU RV R> RQ RW RP R� R� R� R� R/ t nameRP R8 RT R9 R) R� R� R% R� ( R R> Rp t ismagt isoutputRo R� Re Rf ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR? � s,
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The Image class whose size is determined by the given bbox.
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R. R/ R0 R1 R% R2 R3 R4 N( R R! R$ R (
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c C sj t | j � r | j | | � S| j � s5 t i f S| j | j } } | j � j | | � } | i f S( s? Test whether the mouse event occured within the image.
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R� R� R? R^ R� R� t _set_gc_clipR� R R� ( R R� R� R5 t image_magRo R� R� R� R" R� ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyR� d s
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Return image file in *fname* as :class:`numpy.array`. *fname* may
be a string path or a Python file-like object.
If *format* is provided, will try to read file of that type,
otherwise the format is deduced from the filename. If nothing can
be deduced, PNG is tried.
Return value is a :class:`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
<http://www.pythonware.com/products/pil/>`_ is installed, it will
use it to load the image and return an array (if possible) which
can be used with :func:`~matplotlib.pyplot.imshow`.
c s> y d d l } Wn t k
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Saves a 2D :class:`numpy.array` as an image with one pixel per element.
The output formats available depend on the backend being used.
Arguments:
*fname*:
A string containing a path to a filename, or a Python file-like object.
If *format* is *None* and *fname* is a string, the output
format is deduced from the extension of the filename.
*arr*:
A 2D array.
Keyword arguments:
*vmin*/*vmax*: [ None | scalar ]
*vmin* and *vmax* set the color scaling for the image by fixing the
values that map to the colormap color limits. If either *vmin* or *vmax*
is None, that limit is determined from the *arr* min/max value.
*cmap*:
cmap is a colors.Colormap instance, eg cm.jet.
If None, default to the rc image.cmap value.
*format*:
One of the file extensions supported by the active
backend. Most backends support png, pdf, ps, eps and svg.
*origin*
[ 'upper' | 'lower' ] Indicates where the [0,0] index of
the array is in the upper left or lower left corner of
the axes. Defaults to the rc image.origin value.
*dpi*
The DPI to store in the metadata of the file. This does not affect the
resolution of the output image.
i����( t FigureCanvasAgg( t FigureNt figsizet dpit frameonR/ t vmint vmaxR% Rm ( t matplotlib.backends.backend_aggRs t matplotlib.figureRt R8 R� RS t figimaget savefig( R� t arrRx Ry R/ Rm R% Rv t FigureCanvasRt Rp Ru RS t canvasRo ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyt imsave� s 3 'c C s d � } | j d k r! | } n� | j d k rc | } | | � } | j d | j d f | _ | S| j d k r� | } | | � } | j d | j d d f | _ | Sy | j d � } Wn t k
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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
c S s4 | j d | j d d � } t j | t j � } | S( s return a 1D array of floatst rawi i����( t tostringt modeRN t
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make a thumbnail of image in *infile* with output filename
*thumbfile*.
*infile* the image file -- must be PNG or PIL readable if you
have `PIL <http://www.pythonware.com/products/pil/>`_ installed
*thumbfile*
the thumbnail filename
*scale*
the scale factor for the thumbnail
*interpolation*
the interpolation scheme used in the resampling
*preview*
if True, the default backend (presumably a user interface
backend) will be used which will cause a figure to be raised
if :func:`~matplotlib.pyplot.show` is called. If it is False,
a pure image backend will be used depending on the extension,
'png'->FigureCanvasAgg, 'pdf'->FigureCanvasPDF,
'svg'->FigureCanvasSVG
See examples/misc/image_thumbnail.py.
.. htmlonly::
:ref:`misc-image_thumbnail`
Return value is the figure instance containing the thumbnail
id i����NRu Rv s .png( Rs s .pdf( t FigureCanvasPDFs .svg( t FigureCanvasSVGs0 Can only handle extensions 'png', 'svg' or 'pdf'( Rt i i t aspectR' Rw t xtickst yticksR4 R1 R ( Rj Rk t splitRl Rr R8 R� R� t matplotlib.pyplott pyplotRP Rz Rs t matplotlib.backends.backend_pdfR� t matplotlib.backends.backend_svgR� R� R{ Rt t add_axesRS t imshowR& R} ( t infilet thumbfilet scaleR1 t previewt basedirRo t baseoutt extoutRo R� R� t depthRv RB RA t extensiont pltRS R Rt R� R. Rp ( ( sC /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/image.pyt thumbnail� s4 & ! 3 (, RN t
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