Daisy example faulty output

[rougier]

If you look at the example in http://scikit-image.org/docs/dev/auto_examples/plot_daisy.html:

it seems some pixel are "missing". When you run the example localy, you don't have such problem but the overall quality of the circles and line is not so good I would say (circles appears very roughly antialiased).

[jni]

@rougier I think this is an issue with Matplotlib, which resamples images when displaying. If you save the descs_img, do you see the same issue?

[rougier]

When I save the whole fig, the circles are ok (but still "badly" drawn).

[soupault]

@tacaswell, could you comment on issue, please?

[tacaswell]

Is there any way to visualize the daisies using circle and line objects?

I think the problem is that desc_img is an image full of one pixel wide features which is interacting badly with the aliasing when it is raterized on to the canvas.

On a phone so hard to dig much deeper.

[soupault]

Yes, thanks.
I don't know if someone uses descs_img besides this example, but we can for sure re-implement it using matplotlib primitives.

[stefanv]

How about some anti-aliased drawing? See #1827!

[soupault]

Looks better I guess: