Standard Deviation Stretching

Standard deviation stretching is a technique used in image processing to improve contrast. It involves analyzing the pixel brightness levels in an image to find the average (mean) and how much they vary (standard deviation). The method then expands the brightness range based on these values, typically stretching the darkest areas toward black and the brightest toward white, while maintaining the natural variation. This enhances details and makes the image appear more balanced and clearer without losing subtle differences in brightness. It's like adjusting the contrast to better reveal the full range of tones in the image.