We made a Java-based open source implementation jSLIC - the superpixel clustering with better performance than the original Simple Linear Iterative Clustering. For more info, please see Fiji wiki.
As you can see the Interface to the plugin contains a parameters for superpixel configuration and also its final visualisation.
For the configuration there are only two parameters to be set:
To show of handle segmentation results we presented a few approaches:
Borovec, J., & Kybic, J. (2014). jSLIC : superpixels in ImageJ. Computer Vision Winter Workshop. Praha.