Samsung Electronics Co., Ltd.

Kyunghoon Yoon

Jeongki Kim

Jaehyoung Park

Kyongtae Park

Jonghoon Won

Jeongwon Lee

Jaehyung Park

Junsik Choi

Soonae Kim

Hyungok Choi

An electronic device according to various embodiments of the present invention may comprise: a camera including a lens assembly having one or more lenses, and a driving unit that can adjust focus by moving at least some of the lenses (a portion of the lenses) of the lens assembly; a memory; and a processor operatively connected to the lens assembly, the camera, and the memory. According to one embodiment, the processor can adjust the focus of an external object by: using the camera to obtain a first image and a second image of the external object, the first image corresponding to a first position of the portion of the lenses and the second image corresponding to a second position of the portion of the lenses; using the first image and the second image to determine conditions related to contrast characteristics of the external object; using the first image, the second image, and a designated point spread function to determine a first movement direction and the amount of movement of the portion of the lenses on the basis of the conditions satisfying a designated first condition; and moving the portion of the lenses according to the determined first movement direction and the determined amount of movement. According to one embodiment, the processor uses the contrast difference between the external object included in the first image and the second image to determine a second movement direction of the portion of the lenses on the basis of the conditions satisfying a designated second condition, and can adjust the focus of the external object on the basis of at least the contrast change of one or more images obtained while moving the portion of the lenses along the determined second movement direction. Other embodiments are also possible.

Autofocus method and electronic device performing same

A method and an apparatus for operating an electronic device is provided. A first image is obtained at a first position of a focus lens of a camera module of the electronic device. The first image is output through a display. A second image is obtained at a second position of the focus lens while the first image is being output. A defocus amount of the focus lens at the second position is calculated based on the first image and the second image. An on-focus region is detected based on the calculated defocus amount.

Electronic device for auto focusing function and operating method thereof

An electronic device is provided. The electronic device includes a processor configured to obtain a first image of an external object, generate a first color image and a second color image by using the first image, identify a difference in first spread level between a display object of the first color image and the display object of the second color image, determine a first on-focus position of a lens w based on the difference in first spread level, move the lens in a direction corresponding to the first on-focus position, obtain a second image of the external object, determine a second on-focus position of the lens based on a difference in second spread level between the external object contained in the first image and the external object contained in the second image, and move the lens to the second on-focus position.

Method for adjusting focus based on spread-level of display object and electronic device supporting the same

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Suwon-si, South Korea

Kyunghoon Yoon