A method of altering a distinctive image within a digital video file is provided, wherein data representing a set of images in the file is selected. The data is then scanned for a pixel having a color associated with the distinctive image. Then additional pixels having the color are located in a plurality of directions relative to the first pixel. A shape is determined based on the location of pixels, and the shape compared to the distinctive image so that a probability can be determined as to whether the shape represents the distinctive image. If the probability exceeds a confidence level, then the distinctive image is altered.