Final answer:
A histogram is a graphical representation of the distribution of a dataset. It helps determine values of interest, identify image plate exposure, and automatically rescale values if the image was under or overexposed.
Step-by-step explanation:
A histogram is a graphical representation of the distribution of a dataset. It displays the frequency of each interval or bin in the dataset. The functions of a histogram include:
- Determining values of interest: By examining the histogram, you can identify the range of values that occur most frequently.
- Identifying image plate exposure: Histograms can be used in image processing to analyze the exposure levels in an image.
- Automatically rescaling the values: If an image is under or overexposed, the histogram can be used to adjust the values and improve the overall quality of the image.