Renaming files with rename and perl expression

[Csanyi Pal <csanyipal@gmail.com>]

Hi,

I have a directory with filenames as follows:

PIC00001.JPG
PIC00002.JPG
 ..
PIC00036.JPG

I want to get renamed those to
PIC00199.JPG
PIC00200.JPG
 ..
PIC00234.JPG

I'm trying to use for this the 'rename' command with perl expression,
but sofar I'm here with the command:
rename -n 's/PIC000...JPG/PIC00199.JPG/' *
PIC00001.JPG renamed as PIC00199.JPG
PIC00002.JPG renamed as PIC00199.JPG
 ..
PIC00001.JPG renamed as PIC00199.JPG

The -n option is here for No Action: show what files would have been
renamed. 

So how can I increase numbers in filenames in perl expression to get:
PIC00199.JPG
PIC00200.JPG
 ..
PIC00234.JPG

??

Where can I study perl expressions?

Any advices will be appreciated!

-- 
Regards, Pal
<http://cspl.me>