Lena (image used in image processing)

Lena is a standard test image widely used in image processing research to evaluate and compare algorithms. It features a clear, detailed portrait of a woman with distinctive features, making it ideal for analyzing how well various techniques, like compression or filtering, preserve image quality. Since its introduction in 1972, Lena has become a benchmark due to its balanced detail and widespread availability, helping researchers understand how different methods perform on real-world images. Overall, Lena serves as a consistent reference point for testing and developing digital image processing tools.