No ROIs generated while segmenting gray images

[bpavie]

The plugin is working great, however, if I open Lena, convert to 8bits gray and process the image using the JSlic plugin, no ROIs show-up into the ROI manager:

run("Lena (68K)");
run("8-bit");
run("jSLIC superpixels 2D", "init.=30 regularisation=0.20 export overlap=none colour indexed");

However, the segmentation happens.

It is not the case if the image is not converted to gray-scale.

[Borda]

It seem that problem is in visualization part and some how with this particular image, because other gray image is fine:

run("AuPbSn 40 (56K)");
run("8-bit");
run("jSLIC superpixels 2D", "init.=30 regularisation=0.20 export overlap=none");