1. A device for determining a disappearing direction, comprising: circuitry configured to: detect a plurality of edges of one or more objects in a video image to obtain corresponding line segments on the one or more objects; group the line segments into a plurality of line segment groups by a predetermined rule, initially estimate the disappearing direction according to the plurality of the line segment groups, and obtain an initial estimation of the disappearing direction; select at least one line segment which is closest to the initial estimation from a predetermined number of the line segment groups among all the line segment groups; and determine the disappearing direction using the selected at least one line segment, wherein the circuitry is configured to initially estimate the disappearing direction by using a second disappearing direction perpendicular to the disappearing direction to be estimated, and combine the line segment groups into one or more combinations, each combination including at least two groups.