stir_math (and others) should check arguments with has_same_characteristics

I am trying to generate a set of ellipsoidal cylinders to add to an XCAT volume. The parameter file to generate one of these lesions is:

generate_image Parameters :=
output filename:=lesion_activity
X output image size (in pixels):=141
Y output image size (in pixels):=141
Z output image size (in pixels):=47
X voxel size (in mm):= 2
Y voxel size (in mm):= 2
Z voxel size (in mm) :=2.18

  Z number of samples to take per voxel := 1
  Y number of samples to take per voxel := 1
  X number of samples to take per voxel := 1

  ;Lesion1
shape type:= ellipsoidal cylinder
Ellipsoidal Cylinder Parameters:=
   radius-x (in mm):=5.0
   radius-y (in mm):=5.0
   length-z (in mm):=10.0
   origin (in mm):={50,-20,-50}
   END:=
value :=2000

My script is:

generate_image lesion_activity.par

stir_math --add test_add  uni_xcat.hv lesion_activity.hv

list_ROI_values --V roi test_add.hv lesion_ROI.par 0

where uni_xcat.hv is an image of uniform 1s and lesion_ROI is:

ROIValues Parameters :=
  ROI name := lesion1
ROI shape type:= ellipsoidal cylinder
Ellipsoidal Cylinder Parameters:=
   radius-x (in mm):=5.0
   radius-y (in mm):=5.0
   length-z (in mm):=10.0
   origin (in mm):={50,-20,-50}
END:=

This results in a output roi file that is clearly wrong.

test_add.hv
            ROI          Mean          Stddev         Volume
        lesion1              1              0          697.6
        lesion2              1              0          697.6

diff lesion_activity.hv uni_xcat.hv reveils the primary difference is:

< first pixel offset (mm) [1] := -140
< first pixel offset (mm) [2] := -140
---
> first pixel offset (mm) [1] := -165
> first pixel offset (mm) [2] := -165

Therefore, should list_ROI_values account for this kind of offset? Or should I just be smarter in defining ROI regions.

P.S. Changing the ROI origin to origin (in mm):={50,-45,-75} compensated for this issue and gave me correct ROI values.

Reproduce the mismatch with stir_math --add and list_ROI_values using the parameter files and image offsets shown in the report. Inspect the argument handling for stir_math and related tools, focusing on has_same_characteristics. Done means incompatible image characteristics are detected before processing and the reported offset case is handled consistently.