fix: fractional segmentation

[pedrokohler]

Fixing fractional segmentations:
1 - fixing color palette and maintaining transparent background
2 - removing color palette overlay for binary segmentations
3 - removing annoying zoom when activating segmentations

Addresses: ImagingDataCommons/slim#245

Binary segmentation now = no background and no color palette overlay:

Fractional segmentation now = no background and proper colors:

[pedrokohler]

@fedorov please check the PR description and let me know if that's all

[fedorov]

@pedrokohler nice work! Good to go from the description and the screenshot, once @igoroctaviano approves it!

[fedorov]

Small nitpick - is it possible to include min and max pixel values in the color palette overlay for fractional?

[pedrokohler]

Small nitpick - is it possible to include min and max pixel values in the color palette overlay for fractional?

@fedorov what do you mean exactly?

[fedorov]

I mean that right now it is impossible to tell what values the extreme colors (deep purple and yellow) correspond to. I mean, I assume blue is zero and yellow is 255? But we can also refine it separately. Another related suggestion is to allow showing the actual value in a tooltip on mouse over, on on click, as we do for binary. It is ok to do both of those outside of this PR.

[pedrokohler]

@fedorov is this good enough?

[fedorov]

Yes!

[fedorov]

@pedrokohler when this is merged, can you please update dmv version in Slim, and then propagate updates from Slim into idc-slim repo https://github.com/ImagingDataCommons/idc-slim?

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[igoroctaviano]

LGTM

[pedrokohler]

@fedorov @igoroctaviano whoever has access, please merge. I'm not authorized.