1. A method comprising: comparing a frame rate of image capture by an image sensor to a frame rate threshold at an image capture device; when the frame rate is less than the frame rate threshold, increasing the frame rate to a modified frame rate that is greater than or equal to the frame rate threshold; decreasing an integration time and increasing an image signal gain at the image capture device to adjust an image brightness level before performing an autofocus operation on an image captured at the modified frame rate; and performing an autofocus operation on the image captured at the modified frame rate.