1. A packaging material with a forgery-proof security feature and an associated decoder element, whereby the security feature comprises a coded image arrangement with individual images of strip-shaped image elements provided on the packaging material and which reveals an image or image sequence by superimposing a related decoder element, the decoder element is a transparent or translucent, film-type object with a line of column-type pattern made up of lines or columns lined up parallel to each other specific distances apart, and the coded image arrangement on the packaging material is a row of many single basic elements of coded individual images that mix into each other with different orientations, whereby the basic elements repeat themselves in a regular manner along the direction of displacement of the decoder element, with result that the coded image arrangement forms a uniform, ornamental-type of pattern that runs in the longitudinal direction of the coded image arrangement, whereby the coded individual images are an arrangement of strip-shaped image elements that are spaced apart and are coordinated in terms of orientation and distance from each other with respect to the line or column pattern of the decoder element, such that by overlapping the image arrangement and the decoder element and lateral displacement of the decoder element over the image arrangement, an image sequence that to the human eye appears to be moving is obtained in that, depending on the position of the decoder element, the coded individual images are covered by the line or column pattern or are visible by means of a window region lying between the lines or columns and, in combination with the line or column-type pattern of the decoder element, fit together to make up recognizable individual images with different orientations.