Virtual Drawing pad

Virtual Drawing PAD 

 

 

 Virtual drawing Pad can be made using image processing algorithums in MATLAB or any other signal processing tools(e.g Scilab). 
      Algo goes as follows : 

• Image aquisition is set using MATLAB tools and laptops web camera (you can go for high resolution camera for better accuracy ).
• A circular single coulred object is used (here tip of bottle).
• Image is taken at suitable rate and stored in temporary memory or variable.
• The each pixel of the image is checked for greenish colour and area of the bottle tip is identified .
• Now we can write code to find out the centroide of the object .
• once centroide is found . it is beging traced in each image sample of the incoming video.
• now a fresh image is created having black color and it is being updated with white dots according to instantaneous position of centroid  of the object hence we get smooth line.