Abstract: A head mounted display and a tracking mode switching method are provided. The head mounted display calculates a first motion information corresponding to a controller and a second motion information corresponding to a tracked hand based on the real-time images. The head mounted display determines to switch to a hand-held controller tracking pose mode or a hand tracking pose mode based on a motion relationship between the controller and the tracked hand.

Abstract: A head mounted display and a tracking mode switching method are provided. The head mounted display calculates a first motion information corresponding to a controller and a second motion information corresponding to a tracked hand based on the real-time images. The head mounted display determines to switch to a hand-held controller tracking pose mode or a hand tracking pose mode based on a motion relationship between the controller and the tracked hand.

Abstract: An extended reality system is provided. The extended reality system includes a camera, a display device and a processor. The camera captures images. The display device displays an extended reality with an application window. The processor performs: detecting a first hand and a second hand in the images; controlling a cursor in the application window according to where a finger of the first hand is on the palm of the second hand; and determining an operation to the application window according to a gesture of the first hand on the palm of the second hand.

Abstract: An extended reality system is provided. The extended reality system includes a camera, a display device and a processor. The camera captures images. The display device displays an extended reality with an application window. The processor performs: detecting a first hand and a second hand in the images; controlling a cursor in the application window according to where a finger of the first hand is on the palm of the second hand; and determining an operation to the application window according to a gesture of the first hand on the palm of the second hand.

Abstract: The embodiments of the disclosure provide a method for inputting letters, a host, and a computer readable storage medium. The method includes: in response to determining that a first hand is presented as a first gesture, showing at least one letter set; in response to determining that the first hand has been changed from the first gesture to a second gesture corresponding to a first letter set among the at least one letter set, showing a subset of the first letter set, wherein the subset of the first letter set comprises at least one letter; in response to determining that a first letter among the at least one letter of the subset of the first letter set has been chosen, inputting the first letter.

Abstract: The embodiments of the disclosure provide a method for inputting letters, a host, and a computer readable storage medium. The method includes: in response to determining that a first hand is presented as a first gesture, showing at least one letter set; in response to determining that the first hand has been changed from the first gesture to a second gesture corresponding to a first letter set among the at least one letter set, showing a subset of the first letter set, wherein the subset of the first letter set comprises at least one letter; in response to determining that a first letter among the at least one letter of the subset of the first letter set has been chosen, inputting the first letter.

Abstract: A bioactive compound obtained from A. cinnamomea mycelium is prepared. The A. cinnamomea mycelium is solid-state cultivated. The bioactive compound is 2,3,6-trimethoxy-4-methylphenol and is called Leader 1. Leader 1 effectively suppresses movement, migration and invasion of lung cancer cells. Leader 1 achieves the effect of anti-metastasis and shows excellent resistance to physiological activity and mechanism on cancer metastasis.