Patent ID: 8417052

Claim:
An instruction system comprising: a capture device that captures a target area including an object; a projection device that projects an annotation image corresponding to an instruction on the basis of a captured image by the capture device, in the target area; a control device including: a judgment portion that judges visibility of the annotation image; a specifying portion that specifies a projection mode of the annotation image from projection modes of the annotation image stored into a storage portion, based on a result of the judgment by the judgment portion; a notification portion that notifies the projection mode specified by the specifying portion; and a projection control portion that causes the projection device to project the annotation image corresponding to an instruction on the basis of the projection mode notified from the notification portion; and a terminal including: a reception portion that receives the captured image, and the projection mode notified from the notification portion; and a transmission portion that transmits the instruction on the basis of the captured image received by reception portion, and the instruction on the basis of the notified projection mode, to the control device.