Image capturing apparatus and booting method thereof

An image capturing apparatus, comprising:

• a light sensor, configured to capturing an image;
• a memory card slot;
• a memory card, configured to being plugged into the memory card slot, so as to store the image captured by the light sensor;
• a memory card detecting circuit, configured to detect whether the memory card is plugged into the memory card slot, so as to accordingly generate memory card plug information;
• a first storage unit, configured to record the memory card plug information;
• a second storage unit, configured to record a free space and a file index table of the memory card;
• and
• a processing unit, coupled to the light sensor, the memory card slot, the memory card detecting circuit, the first storage unit, and the second storage unit, and configured to receive a power-on signal and then read the memory card plug information recorded by the first storage unit, so as to determine whether the memory card has been plugged out in a power-off period of the image capturing apparatus, wherein
• if the memory card has not been plugged out, the processing unit directly reads the free space and the file index table previously recorded in the second storage unit, so as to accordingly boot the image capturing apparatus;
• if the memory card has been plugged out, the processing unit re-calculates the free space of the memory card and executes a file sorting procedure to generate the file index table, so as to accordingly boot the image capturing apparatus, and
• when detecting that the memory card has been plugged, the memory card detecting circuit controls the processing unit to execute a boot code of the image capturing apparatus, so as to record the memory card plug information in the first storage unit through the boot code.