What does equalization improve in digital images?

Equalization is a technique used in digital image processing primarily to enhance the visibility of details within an image. It works by redistributing the intensity values of the pixels to achieve a more uniform histogram. This process helps to improve the contrast between different areas of the image, especially in regions that may appear too bright or too dark, allowing details that were previously obscured to become more distinguishable.

While equalization can positively affect contrast, its primary goal is to enhance the visibility of details by bringing out structures that may not be immediately apparent in the original image. This is especially useful in applications like medical imaging, where precise detail is vital for accurate diagnosis or analysis. Thus, the improvement in the visibility of details is the key factor that sets this process apart.