A method for resizing the detection entities of a hybrid matrix image sensor, said hybrid matrix image sensor comprising: - a detection circuit, comprising a matrix of photosensitive elements with a row pitch and a column pitch, each photosensitive element being located at an intersection between a row and a column; - a read-out circuit, comprising a matrix of read-out cells which has the same row pitch and the same column pitch as the detection circuit, each read-out cell being located at an intersection between one of the rows and one of the columns; and - assembly connections of the detection circuit to the read-out circuit, which are arranged between said detection circuit and said read-out circuit, and which are each initially designed to rigidly and electrically connect, in an initial one-to-one allocation, only one of the photosensitive elements to only one of the read-out cells which is initially dedicated to said photosensitive element, separately from the other assembly connections in order to transfer a detection signal (I photo) to the read-out cell, which detection signal is produced by the photosensitive element due to received radiation, wherein electrical connections that are carried by the detection circuit or by the read-out circuit and that lead to the assembly connections, are modified with respect to said initial one-to-one allocation to electrically connect a subset of several adjacent photosensitive elements (11 1 -11 5) to only one of the read-out cells (21 3) which becomes dedicated to said subset of photosensitive elements, separately from other subsets of photosensitive elements, so as to form compound detection entities, characterised in that additional electrical connections which are carried by the read-out circuit, are also modified to electrically connect to the read-out cells (21 3) connected to the subsets of several photosensitive elements (11 1 -11 5), according to a reallocation of resources of the read-out circuit, electronic components which initially belonged to read-out cells (21 1, 21 2, 21 4, 21 5) but these latter read-out cells not dedicated to subsets of several photosensitive elements. - a detection circuit, comprising a matrix of photosensitive elements with a row pitch and a column pitch, each photosensitive element being located at an intersection between a row and a column; - a read-out circuit, comprising a matrix of read-out cells which has the same row pitch and the same column pitch as the detection circuit, each read-out cell being located at an intersection between one of the rows and one of the columns; and - assembly connections of the detection circuit to the read-out circuit, which are arranged between said detection circuit and said read-out circuit, and which are each initially designed to rigidly and electrically connect, in an initial one-to-one allocation, only one of the photosensitive elements to only one of the read-out cells which is initially dedicated to said photosensitive element, separately from the other assembly connections in order to transfer a detection signal (I photo) to the read-out cell, which detection signal is produced by the photosensitive element due to received radiation, wherein electrical connections that are carried by the detection circuit or by the read-out circuit and that lead to the assembly connections, are modified with respect to said initial one-to-one allocation to electrically connect a subset of several adjacent photosensitive elements (11 1 -11 5) to only one of the read-out cells (21 3) which becomes dedicated to said subset of photosensitive elements, separately from other subsets of photosensitive elements, so as to form compound detection entities, characterised in that additional electrical connections which are carried by the read-out circuit, are also modified to electrically connect to the read-out cells (21 3) connected to the subsets of several photosensitive elements (11 1 -11 5), according to a reallocation of resources of the read-out circuit, electronic components which initially belonged to read-out cells (21 1, 21 2, 21 4, 21 5) but these latter read-out cells not dedicated to subsets of several photosensitive elements.