Patent ID: 7742085

Claim:
A zoom method comprising: searching a center search line of a photographic screen, wherein the center search line comprises a horizontal axis at an approximate center of the photographic screen; searching each of a plurality of upper search lines from the center search line; searching each of a plurality of lower search lines from the center search line; extracting a color average value and a deviation of a photographic object within the photographic screen for each of the plurality of upper search lines and the plurality of lower search lines; determining a size of photographic object based on the extracted color average value and the extracted deviation for each of the plurality of upper search lines and the plurality of lower search lines, wherein determining the size of the photographic object includes determining a number of pixels that exist within a range of a certain deviation from an average value of a specific color and determining an area of the photographic object based on the determined number of pixels; and setting a zoom ratio by comparing the determined size of the photographic object with a reference value or with a preset size.