Samsung Techwin Co., Ltd.

Samsung Electronics Co., Ltd.

Byung-kwon Lee

Dong Hun Yi

Byung-deok Nam

Soon-hac Hong

A digital photographing apparatus capable of precisely and immediately performing autofocusing on a person being photographed, and a method of controlling the same are provided. The digital photographing apparatus comprises a face detecting unit that detects a face, a body detecting unit that detects a body, which may or may not exclude the face, an autofocus information obtaining unit, and an autofocus object determining unit. The autofocus object determining unit analyzes face autofocus information obtained from the face by the autofocus information obtaining unit and body autofocus information obtained from the body, and then selects the face part and/or the body as an object of autofocusing.

Digital photographing apparatus and method for controlling the same

A method of controlling a digital camera includes performing photographing of an object, determining whether the amount of exposure is appropriate and shakiness is present, and notifying a user of such information if the amount of exposure is not appropriate or shakiness is present. The determination step includes reading a focus value of the object, reading a lower limit value of a compressed file size set to correspond to the read focus value of the object at a compression rate and a resolution set by the user, and determining that the amount of exposure is not appropriate and shakiness is present if the size of a present compressed file of image data obtained from the photographing is smaller than the lower limit value of the compressed file size.

Method of monitoring digital camera capable of informing user of inadequate photographing

A method of automatically focusing a camera determines a position of a focus lens where an amount of a high frequency in an image signal is a maximum. The amount of a high frequency included in an image signal is measured at intervals of multiple focus motor steps. Three of the measured positions (x, x, x) and their corresponding measured high frequency amounts (y, y, y) are identified, where yis the largest of the measured high frequency amounts, and xand xare the nearest measured positions on either side of x. A quadratic function f(x) is determined for the high frequency amount with respect to the focus lens position x. A position at which a derivative of the quadratic function f(x) is zero, is determined to be the position corresponding to maximum high frequency amount. Thus, the driving time of the focus motor can be reduced.

Growing community of inventors

Seongnam-si, South Korea

Byung-kwon Lee