MIT 6 111 - Laser Pointer Mouse (16 pages)

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Laser Pointer Mouse



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Laser Pointer Mouse

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Pages:
16
School:
Massachusetts Institute of Technology
Course:
6 111 - Introductory Digital Systems Laboratory
Introductory Digital Systems Laboratory Documents

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Laser Pointer Mouse Xinpeng Huang and William Putnam TA Javier Castro 6 111 Introductory Digital Systems Laboratory 18 May 2006 Abstract The purpose of this project is to design and implement a laser pointer mouse The laser pointer mouse allows lecturers and presenters to point at a projected screen and with the press of a button move the mouse cursor to the location of the laser without ever touching the computer or mouse A few more buttons allow the user to perform left right and double clicks The system is implemented in Verilog and realized on the FPGA on the 6 111 labkit Overview During a PowerPoint or any other kind of presentation it would be convenient for the lecturer to be able to not only point and direct with his laser pointer but also to use it as a mouse For example he or she may want to open up a demo in another window and it would be convenient to do so without having to walk over to his or her computer Hence our project idea the laser pointer mouse is born The laser pointer mouse works as follows A camera is directed at the projected screen The camera inputs its video data into the FPGA where it is converted to a more useful format and then processed to extract the location of the laser pointer on the screen along with the corner coordinates of the screen The projected screen is then mapped to the computer screen the projection does not fill up the entire field of view of the camera so some rendering will be done to make the necessary conversion After the laser pointer location is rendered to map to the user s computer screen its coordinates are outputted through PS 2 to the computer to move the mouse in the appropriate fashion In addition to this basic functionality a user interface with a variety of operating modes is incorporated into the system The system has three functional modes idle find and adjust Additionally the user interface provides the user with a variety of options in customizing the image processing to best suit the current lighting



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