1. A method comprising: accessing an image; and converting the image from the first color space to IPT color space; while in IPT color space, performing local contrast enhancement by amplifying a difference between each pixel intensity and a local mean calculated over a select region of pixels; performing global lightening adjustment by only altering pixel intensities above a lower intensity threshold and below an upper intensity threshold; performing a chroma enhancement only for pixels above a minimum saturation and below a maximum saturation threshold; and converting the image from IPT color space back to the first color space.