Image sharpening is a digital processing technique used to enhance the clarity and detail of an image. It works by increasing the contrast between adjacent pixels, making edges appear more defined. This process helps to bring out fine details that may be lost in a blurry or low-contrast image. There are various methods for image sharpening, including unsharp mask and high-pass filtering. Each method adjusts the image differently, allowing for tailored results based on the specific needs of the photograph. Proper use of sharpening can significantly improve the overall quality of an image without introducing unwanted artifacts.