Do not hardcode mask shape in on_select

[ianhi]

Currently the image shape is hardcoded in on_select

AC295-final-project-JWI/lib/labelling.py

Lines 383 to 390 in 4f1831a

	def onselect(self,verts):
	self.verts = verts
	p = Path(verts)
	self.indices = p.contains_points(self.pix, radius=0).reshape(450,540)
	self.updateArray()
	self.fig.canvas.draw_idle()

this is bad because it will always fail with differently shaped images. This should be fixed to use the shape of the current image.

[ianhi]

If anyone sees this and would like to make a PR changing it they are more than welcome to :)

[ianhi]

oooh, and even better than fixing that small part of image_segmenter. The project should be reconfigured to make use of the image_segmenter from mpl-interactions which is an improved version of the core lassoing utility. https://mpl-interactions.readthedocs.io/en/stable/examples/image-segmentation.html

Either the current image_segmenter can become a subclass of the class from mpl-interactions or we can make it a new class that just uses the mpl-interactions version for the lassoing part and implements the buttons and such around that.

[ianhi]

If #4 is fully implemented it will supercede this issue.