The article presents a new method for quickly and effectively dividing images into different regions based on their brightness levels. By using a special type of image called an integral image, the researchers were able to speed up the process of finding the best threshold for separating different parts of the image. This method not only reduces the amount of calculations needed but also improves the quality of the segmentation. In simple terms, this new technique helps computers analyze images faster and more accurately, making it a valuable tool for various applications.