Imaging apparatus and control method

摘要

In an imaging apparatus, wherein when performing auto focus control while continuously moving a focusing lens by using an image sensor that has a lag in timing of electric charge accumulation, a focusing accuracy can be improved. To this end, the imaging apparatus includes the rolling shutter function, an imaging unit configured to convert an object image into an image signal, and a setting unit. When a difference exceeds a predetermined amount in the barycentric position of the optical system between an upper line and an a lower line of the AF area due to the rolling shutter function, the setting unit imposes a limitation on the AF area to reduce the size of a desired AF area to an AF area where the difference in the barycentric position becomes a predetermined amount.

主权项

1. An imaging apparatus comprising:
an imaging unit having a plurality of pixels arranged two-dimensionally in a row direction and a column direction and configured to obtain an image of an object by sequentially scanning aperform charge accumulation of the plurality of pixels to read out an image signalat a different timing between each row or each column while moving the position of a focusing lens; aan object detection unit to detect an object area in an image obtained by the imaging unit; and a control unit communicatively-coupled to a memory, wherein the memory stores a program executed by the control unit to, a setting unit to set an AF area corresponding to the object area detected by the object detection unit;, and a focusing control unit configured to obtain in-focus states ofby a plurality of images in the AF area set by the settingcontrol unit, the plurality of images being captured by the imaging unit, and based on information about the in-focus states, to perform focusing control of the focusing lens, wherein whenin a case that the object area is larger than a predetermined size, the settingcontrol unit sets an AF area which is smaller than an AF area which corresponds to the object area by decreasing only the size of the object arealength in the row direction or the length in the column direction in which, when there is a difference occurs in charge readoutaccumulation timing.