PROJECTION CONTROL DEVICE, PROJECTION SYSTEM, PROJECTION CONTROL METHOD, AND PROGRAM

To provide a projection control device which prevents a projected image from being difficult to view even when an object obstructing projection moves in a short time.SOLUTION: A projection control device 200 includes a control part 110 for executing processes of: acquiring position information on an object from a detection part 140; detecting a planar region in a projection surface on the basis of the position information; acquiring a region capable of securing the largest content screen inside the planar region as a projectable region; setting a projection region in which the content screen is projected on the basis of the projectable region; and when the size of the projectable region or the amount of change of the position exceeds a first threshold and then the amount of the change maintains less than a second threshold for a dead time or longer, changing the projection region on the basis of the projectable region after the change.SELECTED DRAWING: Figure 3 【課題】投影の妨げになる物体が短時間のうちに移動しても投影される映像が見にくくなってしまうことを防止する。【解決手段】投影制御装置２００は、物体の位置情報を検出部１４０から取得し、位置情報に基づいて投影面における平面の領域を平面領域として検出し、平面領域の内部でコンテンツ画面を最大に確保できる領域を投影可能領域として取得し、コンテンツ画面を投影する投影領域を投影可能領域に基づいて設定し、投影可能領域の大きさ又は位置の変化量が第１の閾値を超えた後、変化量が第２の閾値未満の状態が不感時間以上継続したら、投影領域を変化後の投影可能領域に基づいて変更する、制御部１１０を備える。【選択図】図３