An electronic device and a method of controlling an operation thereof are provided. The method includes acquiring image data using an image sensor comprising a first plurality of pixels configured to have a first identical exposure time and a second plurality of pixels configured to have a second identical exposure time, wherein the acquiring of the image data includes acquiring the image data using the first plurality of pixels and the second plurality of pixels while the first plurality of pixels have the first identical exposure time that is identical to the second identical exposure time of the second plurality of pixels and controlling the image sensor such that the first plurality of pixels has the first identical exposure time different from the second identical exposure time of the second plurality of pixels, at least partially based on the acquired image data.