def image(self, data=None, filename=None, title=None, alpha_mask=None,
alpha=None, background_color=None, colormap=None,
xdata=[None, None], ydata=[None, None],
pixel_size=None, center_on=None,
interpolation='linear', eliminate_outliers=None,
xformat='%.1f', yformat='%.1f', zformat='%.1f'):
"""
Make an image `plot item` from data
(:py:class:`guiqwt.image.ImageItem` object or
:py:class:`guiqwt.image.RGBImageItem` object if data has 3 dimensions)
"""
assert isinstance(xdata, (tuple, list)) and len(xdata) == 2
assert isinstance(ydata, (tuple, list)) and len(ydata) == 2
param = ImageParam(title=_("Image"), icon='image.png')
data, filename, title = self._get_image_data(data, filename, title,
to_grayscale=True)
if data.ndim == 3:
return self.rgbimage(data=data, filename=filename, title=title,
alpha_mask=alpha_mask, alpha=alpha)
assert data.ndim == 2, "Data must have 2 dimensions"
if pixel_size is None:
assert center_on is None, "Ambiguous parameters: both `center_on`"\
" and `xdata`/`ydata` were specified"
xmin, xmax = xdata
ymin, ymax = ydata
else:
xmin, xmax, ymin, ymax = self.compute_bounds(data, pixel_size,
center_on)
self.__set_image_param(param, title, alpha_mask, alpha, interpolation,
background=background_color,
colormap=colormap,
xmin=xmin, xmax=xmax, ymin=ymin, ymax=ymax,
xformat=xformat, yformat=yformat,
zformat=zformat)
image = ImageItem(data, param)
image.set_filename(filename)
if eliminate_outliers is not None:
image.set_lut_range(lut_range_threshold(image, 256,
eliminate_outliers))
return image
