Image pickup apparatus that provides a correlation image

摘要

An image pickup apparatus includes an image pickup element configured to provide a photoelectric conversion to an optical image formed by an image pickup optical system, a correlation image acquirer configured to obtain a product between a pixel value of an image output from the image pickup element and a representative value of a reference signal that fluctuates during an exposure time period for each of a plurality of divided time periods made by dividing the exposure time period by a predetermined division number, and a correlation image calculator configured to obtain an output from the image pickup element and to calculate a sum of the product for the exposure time period as a correlation image.

主权项

1. An image pickup apparatus comprising:
an image pickup element configured to provide a photoelectric conversion to an optical image formed by an image pickup optical system; a correlation image acquirer configured to obtain a first product between a pixel value of an image output from the image pickup element and a representative value of a first reference signal that fluctuates during an exposure time period for each of a plurality of divided time periods made by dividing the exposure time period by a predetermined division number such that each of the divided time periods is not more than a half of a period of the first reference signal and to obtain a second product between the pixel value and a representative value of a second reference signal that is a fixed value; and a correlation image calculator configured to obtain an output from the image pickup element and to calculate a first sum of the first product for the exposure time period as a first correlation image and a second sum of the second product for the exposure time period as a second correlation image.