Method of capturing thermal pattern with optimised heating of pixels

A method of capturing a thermal pattern by a sensor comprising a matrix of several rows and columns of pixels and a plurality of heating elements, each heating element being associated with a pixel a group of pixels, and each heating element being configured to heat a heat sensitive measurement element for measurement of the pixel or each pixel in the group of pixels independently of the other heating elements during reading of the pixel or of at least one of the pixels in the group of pixels, the method comprising:

• during a reading of a first pixel or of a first group of pixels, the heat sensitive measurement element of the first pixel or of each pixel of the first group of pixels is heated by a heating element associated with the first pixel or with the first group of pixels, and also during the reading of the first pixel or of the first group of pixels, the heat sensitive measurement element of a second pixel, or of a second group of pixels, in the matrix is heated by at least one other heating element associated with the second pixel or with the second group of pixels, the second pixel or the second group of pixels being read before or after the reading of the first pixel or of the first group of pixels.