Method for capturing an image of a lateral face of a wooden board, where the lateral face is parallel to a main axis of development of the wooden board, with the method comprising: a feeding step wherein, using a conveyor, the wooden board is fed along a feeding direction with the lateral face arranged transverse to the feeding direction and with a front face lying on a feeding plane, until reaching an observation zone; an identification step wherein, using an electronic device, the position of each portion of the lateral face along the feeding direction is identified; an illumination step wherein, in the observation zone, the lateral face is illuminated with one or more light sources located outside of a feeding path of the wooden board, defined by the conveyor; a capturing step wherein, while the lateral face is illuminated by the one or more light sources, and using a plurality of area scan cameras also located outside the feeding path, a plurality of first digital images are captured, wherein each first digital image comprises a portion of the lateral face that extends for an entire height of the lateral face, transverse to the main axis of development, and for part of a length of the lateral face, along the main axis of development, where the set of all such portions corresponds to the entire lateral face; and a merging step wherein, using an electronic processing unit, the first digital images are merged to obtain a second digital image showing the entire lateral face; wherein the capturing step is performed by taking into account the position of the portion, and wherein, when two portions are in positions staggered along the feeding direction by a value greater than a maximum longitudinal offset, the capturing step is performed by capturing the relative first digital images at different moments in time, calculated based on the information determined in the identification step, in such a way that when capturing the relative first digital image, a reference point of the relative portion of the lateral face is in a pre-determined position. a feeding step wherein, using a conveyor, the wooden board is fed along a feeding direction with the lateral face arranged transverse to the feeding direction and with a front face lying on a feeding plane, until reaching an observation zone; an identification step wherein, using an electronic device, the position of each portion of the lateral face along the feeding direction is identified; an illumination step wherein, in the observation zone, the lateral face is illuminated with one or more light sources located outside of a feeding path of the wooden board, defined by the conveyor; a capturing step wherein, while the lateral face is illuminated by the one or more light sources, and using a plurality of area scan cameras also located outside the feeding path, a plurality of first digital images are captured, wherein each first digital image comprises a portion of the lateral face that extends for an entire height of the lateral face, transverse to the main axis of development, and for part of a length of the lateral face, along the main axis of development, where the set of all such portions corresponds to the entire lateral face; and a merging step wherein, using an electronic processing unit, the first digital images are merged to obtain a second digital image showing the entire lateral face; wherein the capturing step is performed by taking into account the position of the portion, and wherein, when two portions are in positions staggered along the feeding direction by a value greater than a maximum longitudinal offset, the capturing step is performed by capturing the relative first digital images at different moments in time, calculated based on the information determined in the identification step, in such a way that when capturing the relative first digital image, a reference point of the relative portion of the lateral face is in a pre-determined position.