1. A method comprising: estimating a presence of a light source from an image having been affected by the light source by identifying a local maxima pixel associated with the light source around a silhouette boundary in the image; estimating a slant angle associated with the light source using the silhouette boundary; estimating a tilt angle associated with the light source based on at least one pixel and the slant angle; and outputting the slant angle and tilt angle.