Image processing device for continuously extracting features of small regions of an image

Abstract

Abstract An image processing device comprises a first register (13) for temporarily storing (Mxn) input picture element data (d i,j ) read serially from a two-dimensionally scanned image having (MxN) picture elements and a second shift register (15) having M stages. A first arithmetic operation circuit (12, 14) effects an arithmetic operation of the input picture element data plus the output data of the second shift register minus the output data of the first shift register, and inputs the operation result to the second shift register. The sum of n consecutive picture elements of each row in an array of (MxN) picture elements is obtained by the first arithmetic operation circuit, and is updated every time a new picture element of the corresponding row is read. A second arithmetic operation circuit (17, 19) is provided to effect an airthmetic operation of the output data of the first arithmetic operation circuit plus the output data of a third register (18) minus the output data of m-th stage of the second register and inputs the operation result to the third register. The accumulated sum of the picture element data of a small area having (mxn) picture elements is obtained by the second arithmetic operation circuit, and is updated every time new picture element data is read, thereby obtaining the accumulated sum of new (mxn) picture element data. Since the small area having (mxn) picture elements is shifted each time the new picture element is read, the feature of each small region can be accurately extracted. The picture element data may be a binary signal or a multi-valued signal

Inventors

• 👤 Shou Tsunekawa

Bibliographic Details