Since years this script was waiting for release,
now check the internal structure of your pictures!
For example little endian dump of a BMP header.

Changes
Exif support
BMP support
MUICON compatible

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  523    1071  48.8% -lh5- 4215 Feb  9 11:59 chkpic.rexx
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         1 file      523    1071  48.8%            Feb  9 18:36