A method and apparatus (70) is provided for estimating blur degradation of an image (75) that includes a specular highlight. A specular highlight in the image is first identified (77), for example with user assistance. A blur kernel is then derived by extracting (78A) the identified specular highlight as foreground from the image (75) and using the extracted foreground as the blur kernel (78C). The image (75) can then be deblurred by deconvolution (79) with the derived blur kernel.