The method further comprises: generating the first output image comprising {TAIL ~ a first output value} for each pixel of the plurality of {HEAD ~ pixels}, the first output value being generated from the temporary value and the source value for each pixel, and generating the second output image comprising a second output value for each pixel of the plurality of pixels, the second output value being generated from the temporary value 
The method further comprises : generating the first output image comprising { TAIL ~ a first output value } for each pixel of the plurality of { HEAD ~ pixels } , the first output value being generated from the temporary value and the source value for each pixel , and generating the second output image comprising a second output value for each pixel of the plurality of pixels , the second output value being generated from the temporary value
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH