1. A head mounted display device comprising: an imaging unit comprising a camera that images an outside scene; an image display that displays an image and is capable of transmitting the outside scene; an electronic watermark acquisition unit that, when executed by a processor, acquires an electronic watermark image embedded such that watermark information is not visually recognized by a user from a captured image of the outside scene, wherein the electronic watermark image includes a first image and a second image such that the first image and the second image are embedded in every N frame from each other's different specific frame, wherein N is an integer greater than 0, and wherein the second image is a different image from the first image; an image setting unit comprising a CPU that determines whether the first image and the second image should be selected by referring to personal information of the user stored in a personal information database, and selects the first image or the second image based on the determination by image setting unit; and a display image controller that displays a watermark information corresponding image associated with the watermark information embedded in the selected electronic watermark image on the image display.