title: GUI for image processing in Qt with opencv library
body: <p>I have written the code for image processing that 
  opens an RGB image, 
  converts it into gray image , 
  thresholds into binary image, 
  erodes the binary image, 
  dilates the eroded image, 
  finds the connected component and label it 
  in visual studio 2010 with opencv library, but now i have to create a GUI for the steps above like i have to create six pushbuttons in which if i push the first button it should open an image and if i push the second button it should convert it into binary thresholded image etc.</p>
  
  <p>can anyone help me with this? i have implemented the push button to open an image but after that i dont know how to proceed.</p>
  
  <p>thanx</p>