a simplified IJ macro version of https://github.com/BIOP/ijp-LaRoMe

labels_to_rois.ijm

// a simplified IJ macro version of https://github.com/BIOP/ijp-LaRoMe
roiManager("reset");
run("Duplicate...","title=temp");
id=getImageID;
h=getHeight;
w=getWidth;
for (y=0;y<h;y++){
	for (x=0;x<w;x++){
		if (getPixel(x,y)>0) {
			doWand(x,y);
			roiManager("add");
			setColor(0);
			fill();
		}
	}
}
selectImage(id);
close();
roiManager("show all");