According to an embodiment, an electronic device includes a display, a memory, and a processor operatively connected to the display and the memory. The memory stores instructions that cause the processor to generate first depth information in a first direction from an object, generate a first point cloud of the object based on the first depth information, generate a first bounding box containing one or more points of the first point cloud, generate second depth information in a second direction from the object, the second direction being different from the first direction, generate a second point cloud of the object based on the second depth information, generate a second bounding box containing one or more points of the second point cloud, generate a third bounding box by combining the first and second bounding boxes, and display the third bounding box on the display. Certain other embodiments are also possible.