1. A method for exposure control for an image, comprising: electronics calculating a skew of the luminance values of at least a portion of the image; if the skew is above a predetermined value, calculating a predicted peak value according to a first formula; if the skew is not above a predetermined value, calculating the predicted peak value according to a second formula; if the predicted peak value is less than a predetermined low predicted peak value, increasing an exposure of the image; and if the predicted peak value is more than a predetermined high predicted peak value, decreasing the exposure of the image.