APPARATUS AND METHOD FOR DYNAMIC RANGE TRANSFORMING OF IMAGES

摘要

An image processing apparatus comprises a receiver (201) for receiving an image signal comprising an encoded image. Another receiver (1701) receives a data signal from a display (107) where the data signal comprises a data field that comprises a display dynamic range indication of the display (107). The display dynamic range indication comprises at least one luminance specification for the display. A dynamic range processor (203) is arranged to generate an output image by applying a dynamic range transform to the encoded image in response to the display dynamic range indication. An output (205) outputs an output image signal comprising the output image to the display. The transform may furthermore be performed in response to a target display reference indicative of a dynamic range of display for which the encoded image is encoded. The invention may be used to generate an improved High Dynamic Range (HDR) image from e.g. a Low Dynamic Range (LDR) image, or vice versa.

主权项

1. An image processing apparatus, comprising:
a receiver for receiving an image signal, the image signal comprising at least an encoded image; a second receiver for receiving a data signal from a display, the data signal comprising a data field which comprises a display dynamic range indication of the display, the display dynamic range indication comprising at least a white point luminance, the white point luminance being able to characterize whether the display is a high dynamic range 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 received display dynamic range indication; and an output for outputting an output image signal comprising the output image to the display.