1. Method for processing at least one image, a block being a portion of the image, a grey level being associated to each pixel of the image, at least one texture pattern block representative of a texture of the image being stored in a memory, the pixel grey levels of each texture pattern block being transformed into frequency coefficients using a predefined transform, the method comprising the following steps: a) selecting a current block in at least one part of the image; b) transforming the pixel grey levels of the current block into a current block of frequency coefficients using the predefined transform; c) building up a merger block, each frequency coefficient positioned at a defined place of the merger block being equal either to the frequency coefficient positioned at the same place of the current block, when said frequency coefficient of the current block complies with a criterion; or to the frequency coefficient positioned at the same place of a texture pattern block among the or each texture pattern block stored in the memory, when said frequency coefficient of the current block does not comply with said criterion; d) selecting a merger block according to a predefined function; e) replacing in the image the current block by the selected merger block.