1. Device for analysing video images wherein it comprises means of obtaining high-frequency components of a video image comprising means of wavelet transformation of said video image, means of obtaining a high-frequency image on the basis of said high-frequency components comprising means of weighting the wavelet transformation of said video image, assigning a greater weighting to a high-frequency image representative of diagonal contours, means of calculating a variance for each pixel of said high-frequency image, means of associating a coefficient with each pixel of the video image as a function of said variance, said coefficient being representative of a visual sensitivity of each pixel for a human eye.