Two teachers (Dr. Abdul Amir Abdullah Karim and Dr. Ikhlas Faleh Nasser) from the Department of Computer Science published a research titled (Distinguishing the English letter from the video series based on a bag of visual words) in the Journal of the College of Madinat Al-Elem University. the research states that there are a lot of digital images available for the printed documents and the search is still on to reach the best algorithm for recognizing the English letters The proposed method consists of four steps. First the wavelet transformation is applied to literal images using the filter. Second, the important points are discovered using the angle detector. Third, those important points are described using the strong Acceleration Descriptor. Fourth, used an algorithm to group attributes into clusters to get a bag of visual words. The experimental results showed that the proposed method is more efficient, fast and distinctive compared to using the method of seven moments and with less time so the bag of visual words is considered the optimum accuracy in the process of distinguishing letters.