A three-dimensional image processing apparatus comprising: a display (151, 310, 410, 510, 1101, 1201, 1301) configured to display an arrangement standard image (1505, 1605) including a left eye image (L, 1267, 1347, 1447) and a right eye image (R, 1269, 1349, 1449) in response to a first request to calibrate the three-dimensional image processing apparatus, wherein the left eye image having a different color or pattern than the right eye image; a three-dimensional image filter (185, 320, 420, 520, 685, 700, 885, 1110, 1120, 1130, 1140, 1150, 1160, 1170, 1203, 1303) positioned at a prescribed distance relative to the display for adjusting a perceived three-dimensional view; a camera (121, 1220, 1225, 1310) configured to detect a position of a user in response to the first request to calibrate the three-dimensional image processing; a switch mode calculation device configured to calculate a switch mode based on the detected position of the user and a reference switch mode, the calculated switch mode indicating the position of opaque regions in which a point at which the user is positioned becomes a sweet spot; and a controller (180, 1040) configured to adjust the three-dimensional image filter based on the calculated switch mode, wherein the three-dimensional image filter includes a plurality of translucent regions and a plurality of opaque regions, the positions of the plurality of translucent and opaque regions being adjustable along a length of the three-dimensional image filter, wherein the controller is configured to determine a first relative position of the translucent and opaque regions to a position of the left eye and right eye images based on the detected position of the user and control the display to display the left eye and right eye images based on the first relative position of the translucent and opaque regions, characterized in that the controller is further configured to control the display to display a graphical user interface, GUI, (1500, 1600) including a button (1510, 1520, 1610, 1620) for moving the opaque region of the three-dimensional image filter, detect a second request for movement of the opaque region of the three-dimensional image filter through the GUI and determine a second relative position of the translucent and opaque regions to the position of the left and right images based on the second request, and change the reference switch mode according to the second relative position, wherein the GUI (1500, 1600) is displayed in a state in which the GUI (1500, 1600) is overlaid on the arrangement standard image (1505, 1601), wherein a number of the switch modes is set based on a number of channels of the three-dimensional image filter, and wherein the number of channels of the three-dimensional image filter means a number of barriers corresponding to two pixels of the display, wherein the controller is configured to control a voltage applied to a plurality of electrodes to adjust a refractive index of a liquid crystal in order to form a lens, the electrodes corresponding to one of the translucent or opaque regions in order to adjust the three-dimensional image filter based on the calculated switch mode, wherein the calculated switch mode is based on the current position of the user and the changed reference switch mode. a display (151, 310, 410, 510, 1101, 1201, 1301) configured to display an arrangement standard image (1505, 1605) including a left eye image (L, 1267, 1347, 1447) and a right eye image (R, 1269, 1349, 1449) in response to a first request to calibrate the three-dimensional image processing apparatus, wherein the left eye image having a different color or pattern than the right eye image; a three-dimensional image filter (185, 320, 420, 520, 685, 700, 885, 1110, 1120, 1130, 1140, 1150, 1160, 1170, 1203, 1303) positioned at a prescribed distance relative to the display for adjusting a perceived three-dimensional view; a camera (121, 1220, 1225, 1310) configured to detect a position of a user in response to the first request to calibrate the three-dimensional image processing; a switch mode calculation device configured to calculate a switch mode based on the detected position of the user and a reference switch mode, the calculated switch mode indicating the position of opaque regions in which a point at which the user is positioned becomes a sweet spot; and a controller (180, 1040) configured to adjust the three-dimensional image filter based on the calculated switch mode,