CanvasWorker
Process images in web workers
Research Links
http://stackoverflow.com/questions/28108581/canvas-image-flattern-combine-imagedata http://stackoverflow.com/questions/746899/how-to-calculate-an-rgb-colour-by-specifying-an-alpha-blending-amount http://stackoverflow.com/questions/726549/algorithm-for-additive-color-mixing-for-rgb-values