An electronic device (101; 201) comprising: a memory (130; 230); a first black-and-white image sensor (430; 530); a second image sensor (440; 540); and a processor (120; 210; 450; 550), wherein the processor is configured to: set different values as a first setting value for the first black-and-white image sensor and a plurality of different second setting values for the second image sensor, if an illuminance value indicating an illuminance at an arbitrary time point does not satisfy a predetermined illuminance value, wherein the first setting value and the plurality of different second setting values are set to values that allow acquisition of at least two color images using the second image sensor, during acquisition of one black-and-white image using the first black-and-white image sensor; acquire the one black-and-white image of an object based on the first setting value using the first black-and-white image sensor; acquire the at least two color images of the object based on the plurality of different second setting values using the second image sensor; generate a color image by synthesizing the black-and-white image with a color determined based on at least part of color information of the at least two color images; and store the generated color image as video data in the memory, wherein the one black-and-white image has a resolution greater than a resolution of the at least two color images. a memory (130; 230); a first black-and-white image sensor (430; 530); a second image sensor (440; 540); and a processor (120; 210; 450; 550), wherein the processor is configured to: set different values as a first setting value for the first black-and-white image sensor and a plurality of different second setting values for the second image sensor, if an illuminance value indicating an illuminance at an arbitrary time point does not satisfy a predetermined illuminance value, wherein the first setting value and the plurality of different second setting values are set to values that allow acquisition of at least two color images using the second image sensor, during acquisition of one black-and-white image using the first black-and-white image sensor; acquire the one black-and-white image of an object based on the first setting value using the first black-and-white image sensor; acquire the at least two color images of the object based on the plurality of different second setting values using the second image sensor; generate a color image by synthesizing the black-and-white image with a color determined based on at least part of color information of the at least two color images; and store the generated color image as video data in the memory, wherein the one black-and-white image has a resolution greater than a resolution of the at least two color images. set different values as a first setting value for the first black-and-white image sensor and a plurality of different second setting values for the second image sensor, if an illuminance value indicating an illuminance at an arbitrary time point does not satisfy a predetermined illuminance value, wherein the first setting value and the plurality of different second setting values are set to values that allow acquisition of at least two color images using the second image sensor, during acquisition of one black-and-white image using the first black-and-white image sensor; acquire the one black-and-white image of an object based on the first setting value using the first black-and-white image sensor; acquire the at least two color images of the object based on the plurality of different second setting values using the second image sensor; generate a color image by synthesizing the black-and-white image with a color determined based on at least part of color information of the at least two color images; and store the generated color image as video data in the memory, wherein the one black-and-white image has a resolution greater than a resolution of the at least two color images.