# US 8,542,302 B2 · Digital photographing apparatus, method of controlling the digital photographing apparatus, and recording medium storing program to implement the method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,542,302 B2 - Document ID: US8542302B2 - Status: Granted - Kind: B2 - Application number: 12/708,614 - Filed: 2010-02-19 - Published: 2010-08-26 - Granted: 2013-09-24 - Earliest claimed: 2009-02-20 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Kyu-ern Hwang; Eun-ho Kim - Inventors: Kyu-ern Hwang; Eun-ho Kim - Web page: https://patentgrep.com/patent/US8542302B2 ## CPC - H04N 5/772: {the recording apparatus and the television camera being placed in the same enclosure} - H04N 23/675: {comprising setting of focusing regions} - H04N 5/781: on disks or drums - H04N 5/85: on discs or drums - H04N 9/7921: {for more than one processing mode} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract Provided are a digital photographing apparatus capable of accurate and quick auto-focusing, a method of controlling the digital photographing apparatus, and a recording medium storing a program for executing the method. The digital photographing apparatus includes: a lens unit including a focus lens; an imaging device generating data from light incident on the imaging device through the lens unit; a condition determining unit determining a photographing condition from the data generated by the imaging device; and an auto-focusing value detecting unit detecting an auto-focusing value from the data generated by the imaging device and comprising a first gamma correction unit, wherein the first gamma correction unit varies the degree of gamma correction according to the photographing condition determined by the condition determining unit, and the auto-focusing value detecting unit detects an auto-focusing value. ## Claims ### Claim 1 A digital photographing apparatus comprising: a lens; an imaging device that generates data from light incident on the imaging device through the lens; a condition determining unit that determines a photographing condition from the data generated by the imaging device; and an auto-focusing value detecting unit that detects an auto-focusing value from the data generated by the imaging device and that comprises a first gamma correction unit, wherein after the first gamma correction unit varies a degree of gamma correction according to the photographing condition determined by the condition determining unit, the auto-focusing value detecting unit detects an auto-focusing value for the varied degree of gamma correction, wherein if the condition determining unit determines the condition as a back light condition, the first gamma correction unit gamma-corrects the data generated by the imaging device such that luminance of a region of a subject to be auto-focused on is high. ### Claim 2 (depends on 1) The digital photographing apparatus of claim 1, further comprising: a storage medium that stores a file including the data generated by the imaging device; and a display unit that displays a still image or a motion image from the data generated by the imaging device or the file stored in the storage medium, wherein the display unit displays a preview motion image corresponding to the data generated by the imaging device until a signal is sent by a user, and the preview motion image is gamma-corrected by the first gamma correction unit of the auto-focusing value detecting unit. ### Claim 3 (depends on 2) The digital photographing apparatus of claim 2, further comprising a second gamma correction unit, wherein still image data is stored in the storage medium from the data generated by the imaging device according to a signal sent by the user, after gamma-correcting the data generated by the imaging device, by using the second gamma correction unit. ### Claim 4 (depends on 1) The digital photographing apparatus of claim 1, wherein if the condition determining unit determines the condition as a back light condition, the first gamma correction unit gamma-corrects the data generated by the imaging device such that luminance of a region of a subject to be auto-focused on is the same as a preset luminance or is larger than the preset luminance. ### Claim 5 A method of controlling a digital photographing apparatus, the method comprising: (a) determining a photographing condition; and (b) adjusting a degree of gamma correction for detecting an auto-focusing value according to the photographing condition, wherein if a back light condition is determined in (a), the degree of gamma correction for detecting an auto-focusing value is adjusted as a first degree in (b), and if no back light condition is determined in (a), the degree of gamma correction for detecting an auto-focusing value is adjusted as a second degree in (b), wherein when the degree of gamma correction for detecting an auto-focusing value is adjusted to be the first degree, a luminance of a region of a subject to be auto-focused on is higher than when the degree of gamma correction for detecting an auto-focusing value is adjusted to be the second degree. ### Claim 6 A non-transitory computer program product, comprising a computer usable medium having a computer readable program code embodied therein, said computer readable program code adapted to be executed to implement a method for controlling a digital photographing apparatus, said method comprising: (a) determining a photographing condition; and (b) adjusting a degree of gamma correction for detecting an auto-focusing value according to the photographing condition, wherein the method further comprises if a back light condition is determined in (a), the degree of gamma correction for detecting an auto-focusing value is adjusted as a first degree in (b), and if no back light condition is determined in (a), the degree of gamma correction for detecting an auto-focusing value is adjusted as a second degree in (b), wherein the method further comprises, when the degree of gamma correction for detecting an auto-focusing value is adjusted to be the first degree, a luminance of a region of a subject to be auto-focused on is higher than when the degree of gamma correction for detecting an auto-focusing value is adjusted to be the second degree.