Patent ID: 7161133
Filing Date: 2007-01-09
Classification: G01P

Abstract:
1. A method to characterise, at least partially, a movement of an object relative to a measurement device, this method determining at least one time-function parameter, in which, by means of a measurement device, from a first determined time, a series of at least three successive first time-spaced linear images are taken in a shot-direction, at a determined time interval, said series forming a first element, and at least, from a second determined time later than the first determined time, at least one second linear image or a series of second linear images of the object in relative movement is taken, forming a second element wherein each second linear image is taken in a direction forming an angle with the shot-direction of the first time-spaced linear image, each second linear image being spaced from the first time-spaced linear images, in which (a) a first development of images in function of time made up of at least a first element and (b) a second development of image made up of at least a second element are formed, in which at least partially at least one linear image of the first development is compared with at least a part of a linear image of the second development to determine the part of time-spaced linear image of the first development which best corresponds to a part of a linear image of the second development and to determine at least one time-function parameter for which at least a part of the first time-spaced image of the said period best corresponds to a part of a second linear image.