LOCAL FEATURE QUANTITY CALCULATION CIRCUIT AND LOCAL FEATURE QUANTITY CALCULATION METHOD

摘要

To provide a local feature quantity calculation circuit configured to reduce circuit scale, power consumption, cost, and computation time, and a local feature quantity calculation method.SOLUTION: A local feature quantity calculation circuit includes: a block unit feature quantity calculation circuit which calculates local feature quantity of a block image; a buffer which holds local feature quantities of multiple block images; a temporary read register which sequentially holds local feature quantities of vertical n block images out of t block images comprising lateral m and vertical n block images to be used in interpolation, which are read from the buffer sequentially; a block register which sequentially shifts local feature quantities of the vertical n block images, which are output simultaneously from the temporary read register, to m register groups to be held; and an interpolation circuit which calculates local feature quantity of pixels of an image by interpolating local feature quantities of t block images which are output simultaneously from the block register.SELECTED DRAWING: Figure 1