A system and method for extracting data from a protected region of memory loads at least a first part of extraction code into physical memory and, thereafter, activates a memory mapping facility that maps a real memory onto the physical memory and prevents programs from accessing a protected memory region of the physical memory. The method includes exposing first and second regions of an image sensor, reading out first image data from the first region, pausing a clock signal to the image sensor after the reading out of the first image data, resuming the clock signal to the imaging module, and reading out second image data from the image sensor for the second region of the image. Moreover, the electronic apparatus includes a data buffer, and a storage section that stores information about a block size.