An image providing method, comprising: transmitting, to an external device, a first video image of a first resolution, which is converted from an original video image of an original resolution; receiving, from the external device, area information about an area of interest of the first video image; determining an area of the original video image corresponding to the area of interest based on the area information and stored settings information corresponding to a first communication protocol, wherein the determined area is smaller than the original video image of the original resolution; converting a part of the original video image of the original resolution to a second video image of the first resolution, wherein the converted part corresponds to the determined area; and transmitting the second video image to the external device; wherein the area of interest is selected based on an object identified, by the external device, in the first video image; wherein the method further comprises: detecting a modification of a communication protocol, by which the first video image and the second video image are transmitted to the external device, from the first communication protocol to a second communication protocol; and one of: modifying the size of the determined area of the original video image based on stored settings information corresponding to the second communication protocol, and modifying the first resolution based on stored settings information corresponding to the second communication protocol. transmitting, to an external device, a first video image of a first resolution, which is converted from an original video image of an original resolution; receiving, from the external device, area information about an area of interest of the first video image; determining an area of the original video image corresponding to the area of interest based on the area information and stored settings information corresponding to a first communication protocol, wherein the determined area is smaller than the original video image of the original resolution; converting a part of the original video image of the original resolution to a second video image of the first resolution, wherein the converted part corresponds to the determined area; and transmitting the second video image to the external device; wherein the area of interest is selected based on an object identified, by the external device, in the first video image; wherein the method further comprises: detecting a modification of a communication protocol, by which the first video image and the second video image are transmitted to the external device, from the first communication protocol to a second communication protocol; and one of: modifying the size of the determined area of the original video image based on stored settings information corresponding to the second communication protocol, and modifying the first resolution based on stored settings information corresponding to the second communication protocol. modifying the size of the determined area of the original video image based on stored settings information corresponding to the second communication protocol, and modifying the first resolution based on stored settings information corresponding to the second communication protocol.