/usr/share/freemat/help/text/imageproperties.mdc is in freemat-help 4.0-5.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | IMAGEPROPERTIES IMAGEPROPERTIES Image Object Properties
Usage
Below is a summary of the properties for the axis.
- alphadata - vector - This is a vector that
should contain as many elements as the image data itself cdata,
or a single scalar. For a single scalar, all values of the image
take on the same transparency. Otherwise, the transparency of
each pixel is determined by the corresponding value from the alphadata
vector.
- alphadatamapping - {'scaled','direct','none'} - For none
mode (the default), no transparency is applied to the data. For direct
mode, the vector alphadata contains values between @[0,M-1]| where
M is the length of the alpha map stored in the figure. For scaled
mode, the alim vector for the figure is used to linearly rescale the
alpha data prior to lookup in the alpha map.
- cdata - array - This is either a M x N array or an
M x N x 3 array. If the data is M x N the image is a scalar
image (indexed mode), where the color associated with each image pixel
is computed using the colormap and the cdatamapping mode. If the
data is M x N x 3 the image is assumed to be in RGB mode, and the
colorpanes are taken directly from cdata (the colormap is ignored).
Note that in this case, the data values must be between @[0,1]| for each
color channel and each pixel.
- cdatamapping - {'scaled','direct'} - For scaled (the
default), the pixel values are scaled using the clim vector for the
figure prior to looking up in the colormap. For direct mode, the
pixel values must be in the range [0,N-1 where N is the number of
colors in the colormap if the data is integer type. For floating point
data types, values must be in the range [1,N].
- children - Not used.
- parent - handle - The axis containing the image.
- tag - string - You can set this to any string you want.
- type - string - Set to the string 'image'.
- xdata - two vector - contains the x coordinates of the
first and last column (respectively). Defaults to [1,C] where
C is the number of columns in the image.
- ydata - two vector - contains the y coordinates of the
first and last row (respectively). Defaults to [1,R] where
R is the number of rows in the image.
- userdata - array - Available to store any variable you
want in the handle object.
- visible - {'on','off'} - Controls whether the image is
visible or not.
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