Fixed database typo and removed unnecessary class identifier.

venv/Lib/site-packages/skimage/viewer/plugins/crop.py

@@ -0,0 +1,45 @@
+from .base import Plugin
+from ..canvastools import RectangleTool
+from ...viewer.widgets import SaveButtons, Button
+
+
+__all__ = ['Crop']
+
+
+class Crop(Plugin):
+    name = 'Crop'
+
+    def __init__(self, maxdist=10, **kwargs):
+        super(Crop, self).__init__(**kwargs)
+        self.maxdist = maxdist
+        self.add_widget(SaveButtons())
+        print(self.help())
+
+    def attach(self, image_viewer):
+        super(Crop, self).attach(image_viewer)
+
+        self.rect_tool = RectangleTool(image_viewer,
+                                       maxdist=self.maxdist,
+                                       on_enter=self.crop)
+        self.artists.append(self.rect_tool)
+
+        self.reset_button = Button('Reset', self.reset)
+        self.add_widget(self.reset_button)
+
+    def help(self):
+        helpstr = ("Crop tool",
+                   "Select rectangular region and press enter to crop.")
+        return '\n'.join(helpstr)
+
+    def crop(self, extents):
+        xmin, xmax, ymin, ymax = extents
+        if xmin == xmax or ymin == ymax:
+            return
+        image = self.image_viewer.image[ymin:ymax+1, xmin:xmax+1]
+        self.image_viewer.image = image
+        self.image_viewer.ax.relim()
+
+    def reset(self):
+        self.rect_tool.extents = -10, -10, -10, -10
+        self.image_viewer.image = self.image_viewer.original_image
+        self.image_viewer.ax.relim()