Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
i do some simple test on optical mouse. it seems that it capture the picture of the surface under the mouse lense in the red light of its LED and use image processing to detect the motion and its direction.
Developed by Agilent Technologies and introduced to the world in late 1999, the optical mouse actually uses a tiny camera to take 1,500 pictures every second. Able to work on almost any surface, the mouse has a small, red light-emitting diode (LED) that bounces light off that surface onto a complimentary metal-oxide semiconductor (CMOS) sensor. The CMOS sensor sends each image to a digital signal processor (DSP) for analysis. The DSP, operating at 18 MIPS (million instructions per second), is able to detect patterns in the images and see how those patterns have moved since the previous image. Based on the change in patterns over a sequence of images, the DSP determines how far the mouse has moved and sends the corresponding coordinates to the computer. The computer moves the cursor on the screen based on the coordinates received from the mouse. This happens hundreds of times each second, making the cursor appear to move very smoothly.
what Ianp given is right but there are more things (by taking current techs) (for its cheapness) the sensor (CCD) will be less sensitive (not 24 bit colour as that of a camera mostly maximum 8 bit monochrome) and the no of pixels will also be very less say 10 pixel X 10 pixel(around) that is enough to find the motion. and the frame rate will also be very less(not 1500 Fps - Even the best ccd camera is around 100(IMAX movie) frames per second ) and another thing try to use the optical mouse on a mirror it will not work
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
) and another thing try to use the optical mouse on a mirror it will not work 
