IMAGE SIGNAL PROCESSING APPARATUS AND IMAGE SIGNAL PROCESSING METHOD

摘要

An image signal processing apparatus is disclosed. This device includes a divided area setup unit which sets rows and columns of divided areas in an area defined by a focal evaluation value calculation area setup unit, a high-brightness pixel presence/absence check unit which determines whether a high-brightness pixel exists in each divided area defined by the divided area setup unit, a high-brightness pixel judgment threshold setup unit which sets a threshold for use in the high-brightness pixel presence/absence checker, and an area-selective focal point evaluation value calculation unit which selects a divided area that was determined by the high-brightness pixel checker to contain no high-brightness pixels as a focal evaluation value calculation target and then calculates a focal evaluation value. Variable control of the high-brightness pixel judgment threshold that is set by the high-brightness pixel judgment threshold setup unit is started and stopped at specified timings.