An image processor, which determines appropriate exposure parameters for a
shutter assembly in a camera. The image processor may computationally
determine a region of interest in a scene sought to be captured, and set
the parameters to ensure that the exposure parameters are set to capture
an image of the scene with the region of interest having a desired
brightness level. In an embodiment, pixel values of multiple frames (each
frame with a corresponding set of configuration parameters of the shutter
assembly) may be examined to determine the frame having pixel values with
the region having the desired brightness level. The shutter assembly may
be configured with the parameters corresponding to such a frame to
provide an auto-exposure feature.