Image acquisition method and apparatus

An electronic device comprising:

• a light emitting module configured to emit light;
• an image sensor to acquire a first preliminary image and a second preliminary image for the subject;
• a calculation module to determine a difference between state information of at least part of the first preliminary image and state information of at least part of the second preliminary image;
• and
• a determination module to determine a candidate emission time related to an acquisition of an output image for the subject, based on the difference,
• wherein the determination module is configured to compare the candidate emission time with a time corresponding to a synchronization period where a plurality of lines of the image sensor simultaneously acquires the output image, and when the candidate emission time is smaller than or equal to the synchronization period, to acquire the output image by controlling the light emitting module to produce light during the candidate emission time in the synchronization period.

A non-transitory computer-readable recording medium having a computer program recorded thereon, the computer program causing a computer to execute a method comprising:

• acquiring a first preliminary image and a second preliminary of a subject through an image sensor operatively coupled to an electronic device;
• determining a candidate emission time relating to an acquisition of an output image of the subject, based on a difference between state information of at least part of the first preliminary image and state information of at least part of the second preliminary image;
• comparing the candidate emission time with a time corresponding to a synchronization period where a plurality of lines of the image sensor simultaneously acquires the output image;
• and
• acquiring the output image of the subject based on the comparison,
• wherein the acquiring the output image comprises, when the candidate emission time is smaller than or equal to the synchronization period, controlling a light emitting module operatively coupled to the electronic device to produce light at the candidate emission time in the synchronization period.