1. A method of identifying an ill-exposed image, comprising: receiving, by a processor, an image comprising a first image block; assessing, by the processor, luminance data associated with the first image block; assessing, by the processor, texture energy data associated with the first image block; and determining, by the processor, whether the image is ill-exposed based on the assessment of the luminance data and the assessment of the texture energy data associated with the first image block, wherein assessing texture energy data associated with the first image block comprises: determining an edge energy of the first image block; determining a variance of luminance of pixels in the first image block; and generating texture energy data for the first image block by dividing the edge energy by the variance.