Cursor positioning method for handhold camera

Abstract

The invention relates to a cursor positioning method of a hand-holding camera. A camera which is attached to a hand-holding device is used for shooting continuous images, so as to sense the movement of the hand-holding device and ensure that a cursor in a computer menu produces relative displacement. Mainly, the camera is arranged in the hand-holding device (such as a laser director) to shoot the continuous images at the field scene; image data is transmitted to a computer at real time; the computer selects a most obvious characteristic point in an image no. N and records the position in the image; then the computer searches the characteristic point in an image no. (N+1); if same characteristic point is found, the computer judges the movement of the hand-holding device according to the position changes of the characteristic point in two images and ensures that the cursor produces the relative displacement further; if the same characteristic point in the image no. N can not be found in the image no. (N+1), the characteristic point is given up; the characteristic point is reselected in the image no. (N+1), and the new characteristic point is contrasted in an image no. (N+2) again.

Description

technical field [0001] The present invention relates to cursor positioning of a computer, in particular to a cursor positioning technology for sensing hand movements in an image contrasting manner. Background technique [0002] The operating system of the Graphical User Interface (GUI) has been fully adopted by the personal computer for a long time. In this user interface, various operations are mainly performed by moving the cursor, and the cursor is usually controlled by a mouse. [0003] Generally, the mouse must be used on a fixed plane (usually a desktop), but in some specific occasions, there is a problem that the mouse cannot be used. PowerPoint) to play slides, the speaker usually uses a laser pointer to explain the content of the slides on the podium, it is difficult to directly operate the computer that plays the slides, in most cases, the speaker needs to operate through another person However, this kind of computer not only requires the speaker and the computer ...

AI Technical Summary

Problems solved by technology

[0003] Generally, the mouse must be used on a fixed plane (usually a desktop), but in some specific occasions, there is a problem that the mouse cannot be used. PowerPoint) to play slides, the speaker usually uses a laser pointer to explain the content of the slides on the podium, it is difficult to directly operate the computer that plays the slides, in most cases, the speaker needs to operate through another person However, this kind of computer not only requires the speaker and the computer operator to coordinate the operation of the slide file with gestures, gestures (such as nodding) or words, but it is difficult for the speaker to direct the operation of the computer except for the routine operation of page jumping. The user can perform operations that need to be clicked with the cursor, such as clicking the hyperlink function in the slideshow, or selecting part of the text to display it in reverse video, etc.

[0004] Although there are products on the market that combine a laser pointer and a shake-controlled mouse, the laser pointer held by the speaker can also have a cursor control function. Although the shake-controlled mouse does not need to be operated by a fixed surface, it does Because the accelerometer is used to sense the hand movement, and the hand movement patterns of each operator are very different, it is difficult for the sensitivity setting of the accelerometer to meet the hand movement patterns of all operators, and the sensed It is acceleration rather than speed, and it is difficult to fully respond to hand movements

What's more serious, since the handheld device (laser pointer) moves freely in three-dimensional space, its three-dimensional movement is also difficult to be correctly converted into the movement of the cursor on the two-dimensional plane, causing extreme problems in the user's control of the direction of cursor movement. big difficulty

Therefore, it is difficult to accurately control the movement of the cursor for this type of cursor positioning products that use acceleration sensing. Over-movement, under-movement, and misalignment often occur. Further improvements are necessary.

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