I fitted an ellipse on the image and can see the angle of long aixs by measure menu in ROI manager. How can I see the fitted ellipse on the image?
Use the Edit>Selection>Fit Ellipse command. Here is an example:
newImage("Untitled", "8-bit black", 500, 500, 1); makePolygon(156,97,309,143,389,337,202,337,128,228); run("Add Selection..."); run("Fit Ellipse");
@Wayne How about without macro? just by the tabs of imagej
For draw polygone
19.1.6 Polygon Selection Tool
This may also interest you:
Type ‘b’ (Image>Overlay>Add Selection) to add the selection to an overlay and then use the Edit>Selection>Fit Ellipse command to display the fitted ellipse.