IMAGE PROCESSING APPARATUS, IMAGING APPARATUS, CONTROL METHOD, AND STORAGE MEDIUM

• Main Authors: AMANO KENICHIRO, HASEGAWA REIJI, KAWARADA MASAHIRO
• Format: Patent
• Language: English
• Published: 10.03.2016
• Subjects: CALCULATING; COMPUTING; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; REGULATING

To increase the accuracy of object tracking using particle filter processing, an imaging apparatus performs object tracking processing as follows. During an SW1 holding state and continuous shooting, the apparatus repeatedly performs distributing particles according to the random number following normal distribution based on light metering image data obtained from an AE sensor, estimating an image region of an object by calculating likelihood at the position of each of the particles, and arranging a particle having a lower likelihood in the position of a particle having a higher likelihood. At this time, the apparatus calculates a movement amount of the object based on a difference between the present position of the object and the previous position thereof. If the calculated movement amount is greater than a predetermined threshold value, the apparatus increases the dispersion of the normal distribution for random movement of the particles to be performed next.