Imaging device, method for controlling imaging device, and storage medium storing a control program

摘要

An AF evaluation value is computed with excellent precision. An imaging apparatus (10) includes: an image pickup device (14) including plural photoelectric conversion elements arrayed in a first direction and a second direction; a color filter having repeatedly disposed basic array patterns that each include plural array lines that each run along the second direction and include in the second direction at least one of each of a first filter or second filters with the plural array lines including plural matching array lines in which the second direction positions of the first filter match each other and including at least one array line that has a different array of the first filters in the second direction to that of the matching array lines; and an image processing section (20) that reads pixel signals of the plurality of pixels at a set cycle from the image pickup device (14), and, from the read pixel signals, generates line image data of the matching array lines in the base array pattern, sums together pixels of the first color out of the generated line image data, generates pixel data based on the line image data that has been pixel summed, and computes an evaluation value for contrast AF based on the generated image data.

主权项

1. An imaging apparatus comprising:
an image pickup device comprising a plurality of photoelectric conversion elements arrayed in a predetermined first direction and a second direction intersecting with the first direction; a color filter that is provided above a plurality of pixels configured by the plurality of photoelectric conversion elements, the color filter having repeatedly disposed basic array patterns that each include a plurality of array lines that each run along the second direction and include, in the second direction, at least one of each of a first filter corresponding to a first color that contributes most to obtaining a brightness signal or each of second filters respectively corresponding to 2 or more second colors other than the first color, with the plurality of array lines including a plurality of matching array lines in which the second direction positions of the first filter match each other and including at least one array line that has a different array of the first filters in the second direction to that of the matching array lines, and each basic array pattern of said basic array patterns is 6×6 pixels; a line image data generation section that reads pixel signals of the plurality of pixels at a set cycle from the image pickup device, and, from the read pixel signals, generates, from out of the plurality of pixels, line image data of the matching array lines in the base array pattern; a pixel summing section that sums together pixels at least for pixels of the first color out of the generated line image data of the matching array lines; and an computation section that computes an evaluation value for contrast AF based on the line image data that has been pixel summed, and wherein: the first color is green (G), and the second colors are red (R) and blue (B), and the color filter includes an R filter, a G filter, and a B filter corresponding to colors red (R), green (G) and blue (B), and the color filter is configured by a first array and a second array alternately arrayed in the first direction and the second direction, wherein the first array corresponds to 3×3 pixels with the G filter placed at the center and the 4 corners, the B filter placed at the top and bottom of the central G filter, and the R filter placed at the left and right of the central G filter, and the second array corresponds to 3×3 pixels with the G filter placed at the center and the 4 corners, the R filter placed at the top and bottom of the central G filter, and the B filter placed at the left and right of the central G filter.