1. A distance information estimating apparatus comprising: a first acquiring unit configured to acquire first image data of a first resolution; a second acquiring unit configured to acquire second image data of a second resolution, wherein the first image data and the second image data correspond to the same scene; a distance information estimating unit configured to estimate first distance information by using the first image data and to estimate second distance information by using the second image data; and a distance information combining unit configured to combine the first distance information and the second distance information.