filtering for different effects the use of image processing to achieve pleasing effects in images dates back to the beginning of digital imagesbut it has recently been the basis of number of interesting applicationsthe most well-known of which is probably instagram we are going to use traditional image in image processingthe screenshot of the lenna imagewhich is shown and can be downloaded from the book' website (or many other image-processing websites)im mh imread('lenna jpg'as_grey=trueadding salt and pepper noise we can perform many further manipulations on this result if we want to for examplewe will now add bit of salt and pepper noise to the image to simulate few scanning artifacts we generate random arrays of the same width and height as the original image only percent of these values will be true salt np random random(lenna shape pepper np random random(lenna shape