Digital Image Filtering is a process used to enhance or modify images by applying mathematical operations. This technique can remove noise, sharpen details, or blur certain areas, making images clearer or more visually appealing. Filters can be categorized into linear and nonlinear types, each serving different purposes in image processing. Filters are often implemented in software applications, such as Adobe Photoshop or GIMP, allowing users to easily apply effects. Additionally, convolution is a common method used in filtering, where a small matrix, known as a kernel, is applied to the image to achieve the desired effect.