/home/bill/Projects/Dark matter, spiral galaxies, and galactic current sheets/z
_imagemagic howell-image-translate-rotate - tests of combined.txt
Tests of combined images
www.BillHowell.ca  30Jun2015



#************************
#  Tests of combine images

cmd := 'null'  ;  

#
combine_images IS OP image1  image2  image_dest
{  
   host link 'convert "'  image1  '" "'  image2  '"  -combine  "'   image_dest  '"' ;
}

# error : "no images defined" - doesn't seem to like the 'add' which is interpreted as an image format requiring a decode delegate
combine_images IS OP image1  image2  image_dest
{  
   host link 'convert  -page '  image1  ' -page '  image2  ' -combine add '  image_dest  ;
}


# must put geometry with page - not for galaxy stuff
combine_images IS OP image1  image2  image_dest
{  
   host link 'convert  -page "'  image1  '" -page '"  image2  "' -flatten '"  image_dest  '"' ;
}

#  can only see the spiral, not the stars
combine_images IS OP image1  image2  image_dest
{  
   host link 'composite  -blend 90 "'  image1  '" "'  image2  '"  '"  image_dest  '"'  ;
}

#  can't get this right!
combine_images IS OP image1  image2  image_dest
{  
   host link 'convert -composite  "'  image1  '" "'  image2  '"  '"  image_dest  '"'  ;
}


# blue of one of the images (?first?) and yellow of spiral - no stars
combine_images IS OP image1  image2  image_dest
{  
   cmd :=  link 'convert "'  image1  '" "'  image2  '"  -combine  "'   image_dest  '"' ; 
   write cmd  ;  
   host cmd  ;  
}


#  I don't want "darkening - just a simple addition of colors! 
combine_images IS OP image1  image2  image_dest
{  
   cmd :=  link 'composite  "'  image1  '" "'  image2  '"  -blend ' (string 60) ' "' image_dest  '"'  ;
   write cmd  ;  
   host cmd  ;  
}

# can't see spiral
combine_images IS OP image1  image2  image_dest
{  
   cmd :=  link 'composite  "'  image1  '" "'  image2  '"   "' image_dest  '"'  ;
   write cmd  ;  
   host cmd  ;  
}


# this works OK

combine_images IS OP image1  image2  image_dest
{  
   cmd :=  link 'composite  "'  image1  '" "'  image2  '"  -blend ' (string 40) ' "' image_dest  '"'  ;
  %write cmd  ;  
   host cmd  ;  
}


# the images didn't have the exact same size - so resize the spiral 
# -evaluate-sequence max -> the spiral "kills the underlying stars, blend was better 
combine_images IS OP image1  image2  image_dest
{  
   cmd :=  link 'convert  "' image1  '" "'  image2  '"  -evaluate-sequence max "' 
                             image_dest  '"'  ;
   write cmd  ;  
   host cmd  ;  
}