Patent ID: 8890998
Filing Date: 2014-11-18
Classification: H04N

Abstract:
1. A focusing apparatus comprising: a focus lens; a focus lens driver configured to drive the focus lens in an optical axis direction; an image pickup device configured to generate an image signal by converting image light incident through the focus lens to an electrical signal; a memory configured to store the image signal provided by the image pickup device; a focus evaluation value deriver configured to derive respective focus evaluation values for the image signal read from the memory in at least two directions; an element number determiner configured to determine whether respective numbers of elements for deriving the focus evaluation values which correspond to the respective directions of the image signal are different from each other; a peak value deriver configured to derive respective peak values of the focus evaluation values; a standardizer configured to standardize the peak values to eliminate effects from differences of the numbers of elements if it is determined that the numbers of elements are different from each other; and a focus lens position deriver configured to derive a focus lens position corresponding to one of the peak values.