Abstract: A method for generating a data-bearing image is implemented by an encoding system including a halftoning module and an encoding module that stores encoding rules associated with respective codes. In the method, the halftoning module converts a grayscale image into a halftone image having a plurality of image cells each consisting of a plurality of dots, at least one of which is a first-tone dot and each of the rest of which is a second-tone dot. Afterward, the encoding module generates a data-bearing halftone image encoded with at least one of the codes by maintaining or changing the number of the first-tone dots in one of the image cells based on one of the encoding rules associated with the at least one of the codes.

Abstract: A method for generating a data-bearing image is implemented by an encoding system including a halftoning module and an encoding module that stores encoding rules associated with respective codes. In the method, the halftoning module converts a grayscale image into a halftone image having a plurality of image cells each consisting of a plurality of dots, at least one of which is a first-tone dot and each of the rest of which is a second-tone dot. Afterward, the encoding module generates a data-bearing halftone image encoded with at least one of the codes by maintaining or changing the number of the first-tone dots in one of the image cells based on one of the encoding rules associated with the at least one of the codes.

Abstract: A clamping device for a machine tool includes at least three pivoting members and a drive member drivingly connected to the pivoting members. The clamping device works in such a way that the pivoting members clamp the workpiece to be processed, then the drive member rotates the pivoting members, and the workpiece is also rotated while being clamped between the pivoting members. The clamping device employs at least three pivoting members to clamp the workpiece, and the three pivoting members clamp the workpiece while rotating the same, which can reduce vibration and balance the workpiece. Therefore, the clamping device is capable of reducing vibration, reducing machining errors and improving processing quality.