Now a day’s touch Screen systems have really gained any ground. Everyone is using touch screen devices but the cost of touch screen laptops is very high. we can propose an alternative algorithm to convert any laptop or any device into a touch screen device by using two camera setup. Turn Touch is an implementation of touch screen. The camera’s setup visually tracks a feature on a material and use the movement of the tracked feature to directly control the mouse pointer on a computer. The material could be an LED light or the tip of the stylus. The material accordingly calculates the relative positioning of the feature with respect to the screen of the device to be operated upon. Both the cameras will then diffuse the image and integrates it to form a single image and successfully calculate the coordinates. These coordinates are then used to move the mouse pointer to the specific location, as calculated by the system. An algorithm has been proposed for converting any system into touch screen system.
Digital image processing is the process of using computer algorithms to perform image processing on digital images. As a field of digital signal processing, digital image processing has many advantages over analog image processing. It allows a much wider range of algorithms to be applied to the input data and can avoid problems such as build-up of noise and signal distortion during processing. Since images are defined over two dimensions (perhaps more) digital image processing may be modeled in the form of multidimensional systems. Digital image processing allows the use of much more complex algorithms, and hence, can offer both more sophisticated performance at simple tasks, and the implementation of methods which would be impossible by analog means.The goal of us was to transform the normal LCD screen into a touch screen. This will be done with the help of two web cameras which will be filming the LCD and detecting the motion. This motion will then be transformed into adequate action like left mouse button click or a double click.
The main aim of our was to transform the normal LCD screen into a touch screen. This was done with the help of two web cam which filmed the LCD and detected the motion. This motion was then transformed into adequate action like left mouse button click or a double click. Application works by mapping Web Cam coordinates into LCD coordinates. This means that when Web Cam detects motion it knows its coordinates inside the image it has taken. Those coordinates are then transformed into LCD coordinates by using set of recalculated coordinates of the dots which are displayed during initialization phase. Motion is detected by using red color detection on normalized RGB color space.
Such a system was successfully developed and tested for various modules and different angles. The web cameras were placed at various distances from the screen and at various sizes of screen and were found to be properly working. Thus this system can be easily integrated for commercial purposes with a better quality of camera
Department of Electronics & Communication Engineering (ECE)
JIMS Engineering Management Technical Campus (JEMTEC)
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