ESSILOR INTERNATIONAL (COMPAGNIE GÉNÉRALE D'OPTIQUE)
发明人:
DROBE, BJÖRN,GIRAUDET, GUILLAUME
申请号：
ES10745338
公开号：
ES2523685T3
申请日:
2010.06.25
申请国别(地区):
ES
年份:
2014
代理人:
摘要：
Procedure for characterizing a perception of fuzziness by a subject (10), which comprises the following stages: / 1 / select a criterion of perception of blurring that allows establishing a limit of blurring from which the criterion is satisfied or not for the subject (10)； / 2 / generate and then present an image (C) on a display screen (20), this image having a blur corresponding to a low-pass filtering of image components as a function of spatial frequencies of these image components； / 3 / for the subject (10), the subject being free to move away or approach the presentation screen (20) by varying an observation distance (OD): observe the image presented (C) and indicate whether the perception criteria of the blur selected in stage / 1 / is satisfied or not； / 4 / select a value of the observation distance (OD) performed by the subject (10) in at least one instant during the stage / 3 /； / 5 / from the value selected in step / 4 / for the observation distance (OD), of a spatial cut-off frequency of the low-pass filtering of the presented image (C) and possibly of a pupillary diameter value, determine a dioptric blur value for the presented image observed by the subject (10), said value being associated with the indication provided by the subject in step / 3 / in response to the blur perception criteria.Procedimiento de caracterización de una percepción de borrosidad por un sujeto (10), que comprende las etapas siguientes: /1/ seleccionar un criterio de percepción de la borrosidad que permita establecer un límite de borrosidad a partir del cual el criterio es satisfecho o no para el sujeto (10)； /2/ generar y luego presentar una imagen (C) sobre una pantalla de presentación (20), teniendo esta imagen un borrosidad que corresponde a un filtrado pasa-bajos de componentes de imagen en función de frecuencias espaciales de estos componentes de imagen； /3/ para el sujeto (10) , siendo el sujeto libre de alejarse o de aproximarse a la pantalla de presentación (20) varia
