PROBLEM TO BE SOLVED: To provide an image processing device capable of intuitively collating a head bone and a face, an operation method thereof, an operation program, and an image processing system.SOLUTION: A display control part is a collation index used for collation based on an anatomical knowledge of a head bone and a face, and displays a first figure showing a first collation index on the head bone and a second figure showing a second collation index on the face on a composited image 19. The first figure displays lines 56L, 56R showing positions of a lower one third of left and right eye socket parts, lines 65L, 65R passing the highest point of the left and right eye sockets, lines 67L, 67R, 68L, and 68R showing a length of 3/4 of a width of both eye sockets. The second figure displays points of both outer canthus 70L, 70R, lines 75L, 75R, 76L, and 76R, a distance between a left eye outer canthus and a left eye inner canthus and the distance between a right eye outer canthus and a right eye inner canthus, and lines 77L, 77R passing a center of a circumscribed rectangular area of left and right eyebrows.SELECTED DRAWING: Figure 12【課題】直観的に頭蓋骨と顔を照合することが可能な画像処理装置とその作動方法および作動プログラム、並びに画像処理システムを提供する。【解決手段】表示制御部は、頭蓋骨と顔の解剖学的知見に基づく照合に用いる照合指標であって、頭蓋骨上にある第１照合指標を示す第１図形、および顔上にある第２照合指標を示す第２図形を重ね合わせ画像１９上に表示する。第１図形は、左右眼窩の高さの下１／３の位置を示す線５６Ｌ、５６Ｒ、左右眼窩の最上点を通る線６５Ｌ、６５Ｒ、両眼窩の幅の３／４の長さを示す線６７Ｌ、６７Ｒ、６８Ｌ、６８Ｒである。第２図形は、両目尻の点７０Ｌ、７０Ｒ、左目尻と左目頭の距離および右目尻と右目頭の距離を示す線７５Ｌ、７５Ｒ、７６Ｌ、７６Ｒ、左右眉の外接矩形領域の中心を通る線７７Ｌ、７７Ｒである。【選択図】図１２
