Patent ID: 7280896
Filing Date: 2007-10-09
Classification: G01C,G06T,G08G

Abstract:
1. A process for constructing a synthetic image of the environment of an aircraft and presenting it to at least one pilot of said aircraft, comprising: a) passing a first straight line through a location of the aircraft and forming a first angle of lateral separation α and a first angle of vertical separation β with the course of the aircraft is determined; b) determining a first point, said point being situated on said first straight line to the rear of the aircraft at a distance such that a vertical projection of this first point onto a horizontal plane passing through the location of the aircraft, is situated at a predetermined distance L c) determining a line of aim passing through said first point and forming a second angle of lateral separation va and a second angle of vertical separation vb with a second straight line passing through said first point and parallel to said course of the aircraft; d) defining a plane of projection which is orthogonal to said line of aim; e) constructing an image of at least a part of the environment at least in front of the aircraft, with the aid of a conical projection onto said plane of projection while taking account of said first point as reference point of the projection; f) delimiting said image laterally by two vertical straight lines respectively cutting a horizon line of the image at second and third points which are such that, on the one hand, the angle between the line of aim and a third straight line passing through said first and second points corresponds to a predetermined angle and, on the other hand, the angle between the line of aim and a fourth straight line passing through said first and third points corresponds to a predetermined angle; g) adapting the scale of the image thus delimited so as to match the straight line segment which is formed by said second and third points and which defines the width of the image, to the width of a display screen for presenting said image, and delimiting this image vertically as a function of the height of said display screen; and h) presenting the image thus constructed representing a synthetic image on said display screen.