Image processor, image processing method and image processing program

An image processor for projecting and drawing a plurality of linear objects viewed from a view point on a two-dimensional plane when the view point, a ground, and the plurality of linear objects, of which one end of each linear object is fixed on the ground, are positioned in a virtual three-dimensional space, comprising:

• a storage unit for storing a control program and data on the view point, the ground and the linear objects respectively;
• and
• a control unit for implementing a drawing function for layering the cross-sections of the plurality of linear objects created by cutting the plurality of linear objects at a plurality of planes which are parallel with the ground for each of the plurality of planes as semi-transparent layers, and drawing the cross-sections on the two-dimensional plane, and a redrawing function for moving a part or all of the semi-transparent layers in a predetermined direction after a predetermined time elapsed and redrawing the semi-transparent layer(s) on the two-dimensional plane, by reading the control program and the respective data from the storage unit,
• wherein the control unit divides an image including the plurality of linear objects into a plurality of zones and decides the number of the semi-transparent layers for every zone,
• the predetermined direction is a direction of three-dimensions defined in the virtual three-dimensional space;
• and
• the zone is partitioned to a direction of depth in the virtual three-dimensional space.

An image processing method executed by an image processor for projecting and drawing a plurality of linear objects viewed from a view point on a two-dimensional plane when the view point, a ground, and the plurality of linear objects, of which one end of each linear object is fixed on the ground, are positioned in a virtual three-dimensional space, comprising:

• a drawing step of layering the cross-sections of the plurality of linear objects created by cutting the plurality of linear objects at a plurality of planes which are parallel with the ground for each of the plurality of planes as semi-transparent layers, and drawing the cross-sections on the two-dimensional plane;
• and
• a redrawing step of moving a part or all of the semi-transparent layers in a predetermined direction after a predetermined time elapsed and redrawing the semi-transparent layer(s) on the two-dimensional plane,
• wherein an image including the plurality of linear objects is divided into a plurality of zones and the number of the semi-transparent layers for every zone is decided by the drawing step,
• the predetermined direction is a direction of three-dimensions defined in the virtual three-dimensional space;
• and
• the zone is partitioned to a direction of depth in the virtual three-dimensional space.