1. An image processing apparatus comprising: a control unit that executes exposure time control in units of pixels or pixel regions; a pixel unit that outputs pixel information of a plurality of different exposure times by an imaging process under control of the control unit; and a pixel information combining unit that inputs the pixel information of the plurality of different exposure times output by the pixel unit, executes an operation process using the plurality of pixel information, and calculates a pixel value of an output image, wherein the pixel unit outputs high sensitivity pixel information obtained by adding pixel values of a plurality of high sensitivity pixels set on the basis of exposure control of the control unit and low sensitivity pixel information obtained by adding pixel values of a plurality of low sensitivity pixels, and the pixel information combining unit executes a weight addition process of the high sensitivity pixel information and the low sensitivity pixel information and calculates a pixel value of an output image.