Invert Y Coordinates, potential bug?

Many thanks in advance for help: I am working with an LSM image from a Zeiss LSM 700 Confocal Microscope (101.61x101.61 um, 1024x1024). I am looking to collect the XY coordinates of a line segment ROI (I take the XY coordinates to be the midpoint of the line segment). I have gone to Analyze > Set Measurements > Invert Y Coordinates to make the origin of the image the lower left corner. When I measure ellipses, rectangles and points, the XY coordinates are given with respect to the lower left corner. However, when I use the line tool, the XY coordinates are given with respect to the upper left corner (the default where the upper left corner is taken to be (0,0)). Is there a way to get the line’s coordinates with respect to the lower left corner? Huge thanks again, cheers.

You can save the xy co-ordinates of your line selection (segmented line/straight line). First make your selection then File>SaveAs>XY Coordinates. Not sure if this helps your case though :slight_smile:

The latest ImageJ daily build (1.51d1) fixes a bug that caused the Measure command to ignore the “Invert Y coordinates setting” in Analyze>Set Measurements when measuring the centroid of stright line selections.

1 Like