Imaging apparatus for setting image areas having individual frame rates
An imaging apparatus includes: an imaging device for performing photoelectric conversion of light incident on a photodetective area thereof, and reading signals from the photodetective area so as to output the signals as image signals; a divided area setting device for setting a plurality of image areas on the photodetective area; a frame rate setting device for setting and assigning frame rates individually to the image areas; and a reading control device for individually controlling a timing for reading the signals from each image area set on the photodetective area, in accordance with the corresponding frame rate set by the frame rate setting device. The frame rate setting device may set each frame rate for each frame, or may set one of at least two frame rates assigned to the image areas and then set another frame rate assigned to another image area in accordance with the already-set frame rate.
1. An imaging apparatus comprising:
an imaging device for performing photoelectric conversion of light incident on a photodetective area thereof, and reading signals from the photodetective area so as to output the signals as image signals;
a divided area setting device for dividing the whole photodetective area into a plurality of image areas;
a frame rate setting device for setting and assigning individual frame rates to the image areas, where the frame rate setting device variably sets the frame rate assigned to each image area during photography;
a reading control device for individually controlling a timing for reading the signals of all pixels from each image area set on the photodetective area, in accordance with the corresponding frame rate set by the frame rate setting device;
a target subject setting device for setting a target subject in an image captured by the imaging device; and
a target subject detecting device for detecting the target subject set by the target subject setting device and a movement of the target subject based on the image signals;
wherein the divided area setting device sets the image areas in accordance with a position where the target subject detected by the target subject detecting device is present in the image and with the movement of the target subject; and
the frame rate setting device variably sets the frame rate assigned to each image area in accordance with the movement of the target subject.
2. The imaging apparatus in accordance with claim 1 , wherein the frame rate setting device sets each frame rate for each frame.
3. The imaging apparatus in accordance with claim 1 , wherein the frame rate setting device sets one of at least two frame rates assigned to the image areas, and then sets another frame rate assigned to another image area in accordance with the frame rate which has been set.
4. The imaging apparatus in accordance with claim 3 , wherein said another frame rate is determined by setting a frame rate ratio of said one of at least two frame rates to said another frame rate.
5. The imaging apparatus in accordance with claim 1 , wherein the target subject is set as an area which contains an actual target subject.