1. An around view provision apparatus comprising: a first camera provided at a first side of a vehicle; a second camera provided at a second side of the vehicle; a third camera provided at a third side of the vehicle; a fourth camera provided at a fourth side of the vehicle, the first to fourth cameras provided to capture images of different regions; a memory to store a reference image for each of the first to fourth cameras; a processor to calculate offset information for at least one of the first to fourth cameras based on a difference between the reference image for the at least one of the first to fourth cameras from the memory and an image captured by the at least one of the first to fourth cameras, and to combine the respective images from the first to fourth cameras using the calculated offset information so as to generate an around view image; and a display unit to simultaneously display the around view image generated using the calculated offset information and a second around view image generated without using the calculated offset information, wherein, when the around view image is selected from between the around view image and the second around view image displayed on the display unit, the display unit displays the selected around view image through continuous use of the calculated offset information, wherein unless an impact applied to the vehicle is greater than or equal to a predetermined level, the processor continuously generates a third around view image through continuous use of the calculated offset information after displaying the selected around view image.