Scully, Scott, Murphy & Presser
Image inquiry circuit capable of comparing reference image and retrieval object image
 An image inquiry apparatus includes a plurality of unit inquiry circuits arranged in a matrix of m rows and r stages (each of m and r is an integer more than 1). The plurality of unit inquiry circuits other than the unit inquiry circuits of i-th row and (i+1)-th stage (1.ltoreq.i.ltoreq. a smaller one of m and r, and i is an integer) are connected in series in units of rows. Inputs of the unit inquiry circuits of i-th rows and (i+1)-th stages are respectively connected to inputs of the unit inquiry circuits of i-th rows and i-th stages. Each of the plurality of unit inquiry circuits includes a plurality of pixel processing circuits connected in series, and outputs a calculation data corresponding to a difference between a reference pixel and a retrieval pixel which are both held therein. R summing circuits are respectively provided for the r stages of the matrix. Each of the n summing circuits sums the calculation data supplied from the pixel processing circuits in the corresponding stage to output the summing result. 
NEC Corporation
G G G
G06T G06F G06T
additional inventional inventional
Akira
Sawada