photo editing

[John Hubbard]

So not too long ago a friend of mine was challenged to eat an entire pie 
in an hour.  He succeeded and I have pictures of it.  I would like to 
insert a 'time left mm:ss' at the bottom corner of every image.  I would 
like to do this with bash scripts and/or java code.  My preference is 
bash but if something is too hard I am sure that I can figure out how to 
do it with java.  I need to know how to:
1) read exif time/date from a jpg file 
2) take all of those time/dates and calculate time left.  (I can easily 
do this with java but can it be done from a bash script?)
3) turn all of the time left strings into time left images
4) super impose time left images over original images and save as new 
file. 
 
Oh and to make things easier the images are not all the same 
orientation.  (Some are 3888x2592 others are 2592x3888)
So if there is anyone out there who know how to do any of this from the 
command line, or with java code, I would appreciate it. 

-- 
-john

To be or not to be, that is the question
                2b || !2b
(0b10)*(0b1100010) || !(0b10)*(0b1100010)
        0b11000100 || !0b11000100
        0b11000100 || 0b00111011
               0b11111111
        255, that is the answer.