1. Apparatus for reconstructing a higher-dynamic-range image from a full resolution, lower dynamic range (FRLDR) representation of an image and a lower resolution, higher-dynamic-range (LRHDR) representation of the image, the LRHDR representation having a lower resolution and a higher dynamic range than the FRLDR representation the apparatus comprising: a spatial filtering stage configured to generate a scaling image comprising information relating to high spatial frequency components of the FRLDR representation; an upsampling stage configured to generate an upsampled image from the LRHDR representation; and, a combining stage configured to combine the scaling image and the upsampled image to obtain a reconstructed higher-dynamic-range image.