Abstract:In this paper, useful information on the card side of literacy, to overcome the uneven illumination, camera resolution, and limited, the impact on bar code segmentation and recognition problems, image processing of geometric correction, bilinear interpolation to enlarge, denoising algorithm, and the division of bar code orientation, which determine the positive card information, and improves the barcode recognition accuracy, experiments show that the method and to accurately identify the card’s positive message to the higher recognition rate, has some practical value for future bar code identification to open up a new direction.