Obtaining pixel coordinates using skimage viewer

[tischi]

Currently, in lesson 03-skimage-images, it says:

We can use a tool such as ImageJ to determine the coordinates of the corners of the area we wish to extract. If we do that, we might settle on a rectangular area with an upper-left coordinate of (135, 60) and a lower-right coordinate of (480, 150), as shown in this version of the whiteboard picture:

However, at least on my Mac, also the skimage viewer shows the coordinates of the mouse cursor at the bottom of the image, (129, 71) in below screenshot. Maybe it would be better to refer to this, instead of ImageJ, because the students used this viewer already?

[k-dominik]

The only problem I see is the blocking nature of this viewer. While you can code and try out stuff with Fiji open, this is not possible with the skimage viewer.

[tischi]

This is true! In fact this viewer is anyway a bit annoying as it pops up a window outside of the notebook, which one indeed has to close manually to be able to go on.
Maybe we should look for a better inline image viewer. Or just use plt.imshow (and then refer to images indeed).

[uschille]

The discussion about the image viewer continues in #183.