Abstract: A vehicle driving aid method includes and defining an occupation grid corresponding to discretization into N cells of a field of kinematic parameters of a detected object; acquiring at each time k an observation zk produced by a sensor and determining a sensor probability modeling the behavior thereof; calculating for each cell X, a predicted occupation probability providing the probability that the cell X is, at time k, in occupied state having knowledge of a density of estimated of occupation of the grid a the preceding time; calculating for each cell X, an estimated probability of occupation providing the sensor probability and predicted occupation probability; the latter at time k determined by supposing that a single cell of the grid constitutes, at time k?1, the antecedent of the cell X concerned; evaluating, for each cell X, a collision probability, based on the estimated probability at time k and emitting a signal to avoid the object.

Abstract: The invention concerns a data compaction method and system for an intermediate program. The method consists in searching the program (1000) for identical sequences (Si) and counting Ni number of occurrences of each sequence (Si), a comparison test (1001) to find the superiority of a function f(Ni) to a reference value enables to generate (1003) a specific instruction of a specific code (Ci) with which the sequence (Si) is associated, replacing (1004) each occurrence in the sequence (Si) by the specific code (Ci) in the intermediate program to create a compacted intermediate program (FCC) with which an executing file (FEX) is associated. The invention is applicable to multiple application portable objects such as microprocessor cards, onboard systems of the like.