Final answer:
A Look-up table is used to readjust the values from a histogram to produce the proper contrast in image processing.
Step-by-step explanation:
After values of interest have been determined from a histogram, a Look-up table (LUT) is used to readjust those numbers to produce the proper contrast. A look-up table is a data structure, often used in computer graphics, to transform color values in order to achieve a desired effect on an image. In the context of adjusting contrast in an image, the LUT maps original pixel values to new values that enhance the visual difference between light and dark areas, thereby improving the image contrast. This is crucial in image processing applications and software when fine-tuning the appearance of photographs or digital scans.