An information processor comprising: a storage unit configured to store data representing appearance features of a target device (21, 22-1, 22-2, 22-3) and data of an operation image (G, G1, G2, G3) used for operation of the target device; an acquisition unit configured to acquire an image captured by a camera; a recognition unit configured to recognize an object included in the image based on feature quantity data stored in the storage unit; a display control unit configured to display the operation image based on the data of the operation image stored in the storage unit if the object included in the image is recognized by the recognition unit as the target device; and a finger recognition unit configured to recognize an in-image position of a finger of a user included in the image captured by the camera; and a control unit configured to transmit a command to the target device if the in-image position of the finger of the user recognized by the finger recognition unit corresponds to a position of the operation image displayed on the display, the command adapted to instruct an operation to be performed using the operation image, wherein the finger recognition unit is further configured to recognize the in-image size of the finger of the user included in the image, and either the control unit is configured to transmit the command when the finger of the user in the image is located at the position corresponding to the position of the operation image displayed on the display and when, at that position, the in-image size of the finger of the user becomes larger again after having become smaller than immediately before, or the control unit is configured to transmit the command when the finger of the user in the image is located at the position corresponding to the position of the operation image displayed on the display and when, at that position, the in-image size of the finger of the user becomes smaller than immediately before. a storage unit configured to store data representing appearance features of a target device (21, 22-1, 22-2, 22-3) and data of an operation image (G, G1, G2, G3) used for operation of the target device; an acquisition unit configured to acquire an image captured by a camera; a recognition unit configured to recognize an object included in the image based on feature quantity data stored in the storage unit; a display control unit configured to display the operation image based on the data of the operation image stored in the storage unit if the object included in the image is recognized by the recognition unit as the target device; and a finger recognition unit configured to recognize an in-image position of a finger of a user included in the image captured by the camera; and a control unit configured to transmit a command to the target device if the in-image position of the finger of the user recognized by the finger recognition unit corresponds to a position of the operation image displayed on the display, the command adapted to instruct an operation to be performed using the operation image, wherein the finger recognition unit is further configured to recognize the in-image size of the finger of the user included in the image, and either the control unit is configured to transmit the command when the finger of the user in the image is located at the position corresponding to the position of the operation image displayed on the display and when, at that position, the in-image size of the finger of the user becomes larger again after having become smaller than immediately before, or the control unit is configured to transmit the command when the finger of the user in the image is located at the position corresponding to the position of the operation image displayed on the display and when, at that position, the in-image size of the finger of the user becomes smaller than immediately before.