Contrast detection is a method used in photography and imaging to determine the sharpness and focus of an image. It works by analyzing the differences in brightness between adjacent pixels. When the contrast is high, the image appears sharper, while low contrast can make it look blurry. This technique is commonly used in digital cameras and smartphones to achieve accurate focus. In addition to photography, contrast detection is also important in fields like computer vision and medical imaging. In these areas, algorithms analyze images to identify edges and features, helping to enhance clarity and detail. This process is essential for tasks such as object recognition and diagnostic imaging.