with a sliding exponential window. Scanning film with multiple exposure Multiple exposure technique can also be used when scanning transparencies like slides, film or negatives using a film scanner for increasing dynamic range. With multiple exposure the original gets scanned several times with different exposure intensities. An overexposed scan lights the shadow areas of the image and enables the scanner to capture more image information here. Afterwards the data can be calculated into a single HDR image with increased dynamic range. Among the scanning software solutions which implement multiple exposure are VueScan and SilverFast. See also Autobracketing Bracketing Chroma key Sandwich printing References External links Lothar Schiffler's official Iskiography web page AIRLINES · Bird Tracks in the Air, Iskiographies by Lothar Schiffler: Making-of “AIRLINES XI-1” – Video on Vimeo Photographic techniques