Target tracking apparatus and target tracking method

A target tracking method for tracking a target on the water, comprising:

• acquiring an echo data indicating a correspondence between a position in the detection area and a level of a reflected wave reflected by the electromagnetic wave periodically transmitted through the antenna at the position;
• specifying a target based on the echo data;
• determining a tracking restriction area in which the region in which a level of the reflected wave is equal to or greater than a threshold level is equal to or greater than a predetermined value, based on the echo data;
• and
• tracking the target, based on the echo data in an area outside the tracking restriction area.

A non-transitory computer readable medium storing a program causing a computer to execute image process, the image process comprising:

• acquiring an echo data indicating a correspondence between a position in the detection area and a level of a reflected wave reflected by the electromagnetic wave periodically transmitted through the antenna at the position;
• specifying a target based on the echo data;
• determining a tracking restriction area in which the region in which a level of the reflected wave is equal to or greater than a threshold level is equal to or greater than a predetermined value, based on the echo data;
• and
• tracking the target, based on the echo data in an area outside the tracking restriction area.