1. Method comprising: providing a right image and a left image, providing a disparity estimation map relating to both images, generating a left subtitle detection map for the left image and a right subtitle detection map for the right image, each map indicating subtitle areas within an image, for said subtitle areas and based on said disparity estimation map determining a subtitle disparity value for X and Y directions common for all subtitle areas, using said left and right subtitle maps and said subtitle X and Y disparity values in an image interpolation process.