1. An image fusion apparatus for combining multi-exposure images obtained by an image sensor, the image fusion apparatus comprising: an image capturing and processing unit to obtain a first input image and a second input image that have different exposures, respectively, and to perform motion alignment and exposure processing on the first and second input images; and an image generating unit to generate low-dynamic range (LDR) images by compressing the first input image and the second input image such that each of the first input image and the second input image are divided into regions according to luminance information of the second input image, and to combine the generated LDR images.