title: Fiji/ImageJ - Measure tool when x and y resolution of image not equal
body: <p>I have images with unequal resolution in x and y direction. The pixel height is larger than the pixel width. The pixel width and pixel height are saved in Image > Properties. </p>
  
  <p>When I draw an ellipse on the image and try to use the Analyze > Measure tool I get a '0' for both major and minor axis length for the "Fit ellipse" measurement. 
  I can only get a proper measurement if I remove the scale of the image, or manually change the pixel height and pixel width to an equal number. </p>
  
  <p>I assume this is a bug, but maybe I'm missing something?</p>
  
  <p>As a workaround I was thinking of writing a small macro that saves pixel height and pixel width, then removes the scale of the image, then measures major and minor axis length in pixel and then  re-applies pixel height and pixel width to the measurements.</p>
  
  <p>But I can't find the command for reading out the resolution. Any pointers?</p>