Method and apparatus for generating high dynamic range image

An apparatus for generating a High Dynamic Range, HDR, image, comprising:

• an obtaining unit configured to obtain a set of two or more input images, the two or more input images including a reference image and one or more non-reference images;
• an analysis unit configured to perform, for each of the one or more non-reference images, an image analysis which comprises, for each region of a plurality of regions of the non-reference image, assessing whether the region of the non-reference image and a corresponding region of the reference image show the same image content and declaring the region of the non-reference image as valid or as invalid based on the assessment;
• and
• a generating unit configured to generate the HDR image by fusing the reference image and the one or more non-reference images, wherein the fusing comprises, for each of the one or more non-reference images, disregarding the invalid regions of the respective non-reference image;
• wherein the analysis unit is configured to perform the image analysis by:
• generating a difference image of the non-reference image by subtracting the non-reference image from the reference image or vice versa;
• and
• generating a contrast-enhanced difference image by applying a contrast enhancing transformation to the difference image;
• wherein the assessing is on the basis of the contrast-enhanced difference image.