Hi I am trying to extract the lighting and the shadow from one surface and apply it to another type of surface. I convert the image to HSV and extract the Hue component and plot it which seems to give me a good indication of where the lighting and shadows are. However when I swap the hue component of the original image with my final image I get all sorts of greens and blues that are not desired. Are there any other techniques that can be used to project shadow and lighting?