An image processing apparatus comprising: a receiver for receiving an image signal, the image signal comprising an encoded image and a target display reference, the target display reference being indicative of a dynamic range for which the encoded image is encoded and optimized at a content provider apparatus, the target display reference comprising a white point luminance and an Electro Optical Transfer Function of the target display, the white point luminance of the target display being above 500 Cd/m^2 and the Electro Optical Transfer Function describing the relationship between input driving values and output luminance of the target display; a second receiver for receiving a data signal from an end-user display, the data signal comprising a data field which comprises a display dynamic range indication of the end-user display, the end-user display dynamic range indication comprising at least one luminance specification; wherein the end-user display dynamic range indication comprises a white point luminance and an Electro Optical Transfer Function of the end-user display; and wherein the white point luminance of the end user display is at least 1000 Cd/m^2; a dynamic range processor arranged to generate an output image by applying a dynamic range transform to the encoded image in response to the white point luminance and the Electro Optical Transfer Function of the target display, and to the white point luminance and the Electro Optical Transfer Function of the end-user display; and an output for outputting an output image signal comprising the output image to the end-user display. a receiver for receiving an image signal, the image signal comprising an encoded image and a target display reference, the target display reference being indicative of a dynamic range for which the encoded image is encoded and optimized at a content provider apparatus, the target display reference comprising a white point luminance and an Electro Optical Transfer Function of the target display, the white point luminance of the target display being above 500 Cd/m^2 and the Electro Optical Transfer Function describing the relationship between input driving values and output luminance of the target display; a second receiver for receiving a data signal from an end-user display, the data signal comprising a data field which comprises a display dynamic range indication of the end-user display, the end-user display dynamic range indication comprising at least one luminance specification; wherein the end-user display dynamic range indication comprises a white point luminance and an Electro Optical Transfer Function of the end-user display; and wherein the white point luminance of the end user display is at least 1000 Cd/m^2; a dynamic range processor arranged to generate an output image by applying a dynamic range transform to the encoded image in response to the white point luminance and the Electro Optical Transfer Function of the target display, and to the white point luminance and the Electro Optical Transfer Function of the end-user display; and an output for outputting an output image signal comprising the output image to the end-user display. a dynamic range processor arranged to generate an output image by applying a dynamic range transform to the encoded image in response to the white point luminance and the Electro Optical Transfer Function of the target display, and to the white point luminance and the Electro Optical Transfer Function of the end-user display; and an output for outputting an output image signal comprising the output image to the end-user display.