Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
03/31/08 20:40
Read: times


 		 #152793 - Recently
Responding to: ???'s previous message
Jan Waclawek said:
... I have no option but believe you that they are more fit for BIG tasks, but - IS fingerprint whatever a BIG task?

I repeat I don't know, I am curious - I never tried to do whatever with fingerprints.


Apparently it is, but I'm guessing that's mostly implementation dependent.

I recently worked with a fingerprint scanner and they asked for a 100 MIPS ARM. I was curious about that. It turns out the fingerprint scanner was essentially sending raw scan lines as the finger moves across the scanner and their software library was interpreting those scan lines in real-time in something like an 8k buffer. They claimed they needed 100 MIPS so the software could keep up with the incoming data.

Having said that, I tend to think their libraries were probably poorly written and that's why they demanded so much computing power.

Regards,
Craig Steiner


List of 28 messages in thread
TopicAuthorDate
selection of microcontrller            01/01/70 00:00      
   high-speed 8051 derivatives            01/01/70 00:00      
   Depends            01/01/70 00:00      
      Why not            01/01/70 00:00      
         because            01/01/70 00:00      
   Some more lists for you...            01/01/70 00:00      
   the fastest '51            01/01/70 00:00      
      but            01/01/70 00:00      
         agree            01/01/70 00:00      
            Maybe            01/01/70 00:00      
               but still only 8 bits            01/01/70 00:00      
                  expanding            01/01/70 00:00      
                     And what is needed for fingerprint whatever?            01/01/70 00:00      
                        small micros are for small tasks ...            01/01/70 00:00      
                           well, I don't ARM, so...            01/01/70 00:00      
                              Recently            01/01/70 00:00      
                                 trade in...            01/01/70 00:00      
                                    I do not think so-            01/01/70 00:00      
                                       that's why they use 'C'            01/01/70 00:00      
                                          nope            01/01/70 00:00      
                                    Fingerprint scanniung            01/01/70 00:00      
                                 100 MIPS isn't that fast an ARM ...            01/01/70 00:00      
                              no size fits all ... ...            01/01/70 00:00      
                           what goes for the '51 goes for the ARM as well            01/01/70 00:00      
                              well, not really            01/01/70 00:00      
                                 positive reset is (fortunately) disappearing            01/01/70 00:00      
                                    It's high time ...            01/01/70 00:00      
                                       selection of microcontrller            01/01/70 00:00      

Back to Subject List