3 results about "Entire hand" patented technology

This invention discloses a method and device for full hand vein biometric recognition to prevent spoofing attacks, relating to the fields of full hand vein recognition, biometric information recognition, and identity authentication. The method includes: Step 1, image acquisition and detection: acquiring a frontal hand image covering the palm and finger areas, ensuring the presence of a palm and a real living person in the frontal hand image; Step 2, ROI extraction: extracting the palm vein ROI and the multi-finger ROI; Step 3, feature extraction: extracting palm vein features and features of the four fingers, and generating corresponding feature hash codes; Step 4, feature matching: first matching the palm vein features, then matching the four finger features; similarity comparison is achieved by calculating the Hamming distance between the feature hash codes; Step 5, score fusion: calculating the matching scores for the palm vein features and the four finger features respectively, then performing Tanh normalization on the matching scores, and finally fusing the normalized matching scores to obtain the final recognition result.

The application provides a dexterous hand grasping action control method, electronic equipment and storage medium, and belongs to the technical field of robot dexterous hands. The method comprises the following steps: receiving a grasping task, and acquiring image information of a target object in the grasping task; determining a target diameter corresponding to the target object by analyzing the image information; comparing the target diameter with a plurality of preset grasping diameters of the dexterous hand, and determining a target grasping mode according to a comparison result, wherein the target grasping mode comprises a fingertip grasping mode, a fingertip and second joint cooperative grasping mode and a full hand grasping mode; and controlling the dexterous hand to execute the grasping task in the target grasping mode, wherein in the grasping process, three-dimensional force data collected by three-dimensional force sensors arranged at different positions of the dexterous hand is monitored to determine a real-time grasping state, and a corresponding grasping adjustment strategy is executed according to the real-time grasping state. The application can improve the grasping success rate and operation adaptability of the dexterous hand when facing objects of different sizes.

This application introduces a new type of full-hand held table tennis racket to improve the inherent comfort issues in traditional racket design. The table tennis racket adopts a unique holding structure, aiming to improve the comfort of players and improve the table tennis technical level. Through the redesign of the racket handle, it encourages a more natural and intuitive holding method, making the swing trajectory more consistent with the movement direction of the racket, reducing wrist pressure, thereby reducing fatigue, and making it easier for players to learn. The racket is mainly composed of three core components: the racket face, the handle and the connecting bridge, and is equipped with a carefully designed anti-displacement structure to enhance the stability of the connection. The full-hand holding method uses the entire palm to grip the handle, without the need for finger twisting, thereby reducing the need for professional training, especially suitable for beginners.