A conversion table used to convert data in one distribution to another distribution.
The purpose of a LUT is to take in one value and to output another using a scale. It is a technique to perform a conversion on pixel data. When the pixel values are decoded they are in a normalised range. To transfer to a grayscale the normalised data is windowed into a series of sub-ranges which contain all the important information and a non-linear conversion is then applied. For each modality the conversion is based on different tables, i.e. the CT pixel values are converted into the Hounsfield scale, whereas the pixel values of an x-ray are proportional to the x-ray intensity.
A look-up table, or LUT, implements Boolean functions.
A look-up table (LUT) is used to match one set of geographical areas or points to another. A typical example of a look-up table is the PCED directory which links postal geography to census geography.
a computer table where pre-defined data is stored for future reference
a special table containing additional attributes for features stored in an associated feature attribute table
A table (or function) used to relate intensity of a screen pixel to the data value of that pixel in the image. [ Chapter 10
At higher pixel addressabilites, most graphics controllers can not simultaneously display as many colours as they are capable of generating. Because of video card memory limitations, only a subset of all possible colours can be displayed at one time. A look-up table stores the mapping information which determines which subset of all possible colours are available at any given time.