1. A method of validating biometric capture, in particular body print capture from an area of the body, in particular a fingerprint or face print, of an individual, wherein, in the area of the body provided with the biometric characteristic to be detected, in parallel with the biometric capture proper the method comprising: said area of the body is illuminated using at least a radiation including at least two different respective wavelengths between about 500 nm and 1150 nm, at least two reflectometry measurements are carried out in relation to said at least two different respective wavelengths between about 500 nm and 1150 nm, so as to measure the reflection rate of the tissues of said body area for said at least two wavelengths, the ratio of these two measured rates is calculated, and the calculated ratio of these two measured rates is compared with an interval of reference values of the proportion of oxygenated hemoglobin relative to the deoxygenated hemoglobin characterizing a living tissue for the wavelengths concerned, whereby, if said ratio is within said interval, said area of the body is considered to be living and the biometric capture can be validated, or, if said ratio is not within said interval, said area of the body is considered not to be living and the biometric capture may not be validated.