Playing with canvas pixel manipulation.

demo: http://green-emerald.appspot.com/imageFunJS/camCaptureAndCanvas.html

Current implementations

addNoise: Add gaussian noise to image
blackAndWhite: black and white by getting average of r,g,b
chromaBlue: show blue chroma, needs verification
chromaRed: show red chroma, needs verification
grayScale: use weighted sum of rgb to get the gray value
noEffect: no effect (for use as control for performance comparison)
swapRGBtoBRG: swap r,g,b 
set to zero any of the RGB components

HSVfilter: a filter that can select a contiguous subset of the HSV colorspace