This HDR image is then "tonemapped", where values are mapped back down into the LDR range to create a file that is directly viewable on most monitors.įusing, otoh, simply takes the individual pixel values of the images, and then combines them to form a pixel in the final image. What an HDR technique is doing is to remap the values of the set of images along a scale large enough to encompass the entire high dynamic range, and save it in a special HDR image file format. Photomatix, for example, performs both exposure fusing and HDR. So, it's basically having another way of doing a similar task. Exposure fusing is a different technique of combining images than HDR algorithms.
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