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This Concept Map, created with IHMC CmapTools, has information related to: histogram project, Histogram Analysis to determine automatic rescaling, Digital Imaging Processing has three types, mapping grayscale to pixel values of interest provides images that have uniform display brightness over wide exposure range, Response of digital detector is linear Raw digital image has very low contrast therefore Raw digital values are applied to a look up table, Histogram Analysis can be Neural, A Priori type 1 Extremity Model, VOI portion of histogram changes due to alignment, Metal Model allows for metal or barium in beam, Neural used when VOI portion of histogram changes, image digital value distribution to models in software, images that have uniform display brightness over wide exposure range in CR Response of digital detector is linear Raw digital image has very low contrast, extracting data from main histogram excluding "low" luminence areas, General Model extracts data from main histogram, shape of imager signal distribution to determine exposure index, models in software using Peaks, troughs and widths, Raw digital values are applied to a look up table which is a digital imaging algorithm, relevant information in the exposure field, General Model does not need direct exposure, General Model excludes data from main histogram, from main histogram can use VOI without direct x-ray exposure