Linear image sensing device with image matching function

An image sensing device to be electrically connected to a terminal system, the image sensing device comprising:

• a linear sensors array for sensing a plurality of overlapped whole fragment images of an object when the object moves over the linear sensors array substantially along a moving direction, and thus outputting a plurality of fragment image analog signals;
• a programmable gain amplifier for amplifying the fragment image analog signals and then outputting a plurality of amplified signals;
• an analog-to-digital converter for sequentially receiving and converting the amplified signals into a plurality of digital image signals;
• an image matching module for receiving and matching the digital image signals, and sequentially regenerating non-overlapped partial fragment images, which do not overlap with one another;
• an input/output interface, which is electrically directly or indirectly connected to the terminal system, for sequentially outputting the non-overlapped partial fragment images to the terminal system such that the non-overlapped fragment images are assembled into a complete fingerprint image in a manner of stacking the non-overlapped fragment images side by side;
• and
• a control logic, electrically connected to the linear sensors array, the programmable gain amplifier, the analog-to-digital converter, the image matching module and the input/output interface, for controlling operations of the linear sensors array, the programmable gain amplifier, the analog-to-digital converter, the image matching module and the input/output interface.