AGENCY SYSTENM FOR OPENING AND MANAGING CHAIN STORE ON INTERNET

摘要

An exposure evaluating value generating circuit (8) in an automatic focusing device generates exposure evaluating values for automatic exposure for each of areas in a screen based on video signals from a CCD (3), and a focus evaluating value generating circuit (9) generates focus evaluating values for automatic focusing and employs a prescribed value as a threshold when the aperture area of an iris detected by means of an aperture detecting circuit (11) has at least a prescribed value, or presets a threshold in accordance with the aperture area of the iris when the aperture area has a value smaller than the prescribed value. When a luminance signal is smaller than its reference value, the evaluating value for each of areas is integrated and, when the luminance signal is larger than the reference value, the high-frequency components in the areas where the luminance level is higher than the threshold are excluded from the integration.