rectangletool

RectangleTool

class skimage.viewer.canvastools.RectangleTool(manager, on_move=None, on_release=None, on_enter=None, maxdist=10, rect_props=None) [source]

Bases: skimage.viewer.canvastools.base.CanvasToolBase, matplotlib.widgets.RectangleSelector

Widget for selecting a rectangular region in a plot.

After making the desired selection, press “Enter” to accept the selection and call the on_enter callback function.

Parameters:

manager : Viewer or PlotPlugin. Skimage viewer or plot plugin object. on_move : function Function called whenever a control handle is moved. This function must accept the rectangle extents as the only argument. on_release : function Function called whenever the control handle is released. on_enter : function Function called whenever the “enter” key is pressed. maxdist : float Maximum pixel distance allowed when selecting control handle. rect_props : dict Properties for matplotlib.patches.Rectangle. This class redefines defaults in matplotlib.widgets.RectangleSelector.

Examples

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>>> from skimage import data >>> from skimage.viewer import ImageViewer >>> from skimage.viewer.canvastools import RectangleTool >>> from skimage.draw import line >>> from skimage.draw import set_color

1	>>> viewer = ImageViewer(data.coffee())

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>>> def print_the_rect(extents): ...     global viewer ...     im = viewer.image ...     coord = np.int64(extents) ...     [rr1, cc1] = line(coord[2],coord[0],coord[2],coord[1]) ...     [rr2, cc2] = line(coord[2],coord[1],coord[3],coord[1]) ...     [rr3, cc3] = line(coord[3],coord[1],coord[3],coord[0]) ...     [rr4, cc4] = line(coord[3],coord[0],coord[2],coord[0]) ...     set_color(im, (rr1, cc1), [255, 255, 0]) ...     set_color(im, (rr2, cc2), [0, 255, 255]) ...     set_color(im, (rr3, cc3), [255, 0, 255]) ...     set_color(im, (rr4, cc4), [0, 0, 0]) ...     viewer.image=im

1 2	>>> rect_tool = RectangleTool(viewer, on_enter=print_the_rect) >>> viewer.show()

Attributes

extents

Return (xmin, xmax, ymin, ymax).

__init__(manager, on_move=None, on_release=None, on_enter=None, maxdist=10, rect_props=None) [source]

corners

Corners of rectangle from lower left, moving clockwise.

edge_centers

Midpoint of rectangle edges from left, moving clockwise.

extents

Return (xmin, xmax, ymin, ymax).

geometry

on_mouse_press(event) [source]

on_mouse_release(event) [source]

on_move(event) [source]