pg 12, Fig 1-3, 
Block on right should read: "Measure Level"

pg 16, para 2,
Delete final comma in last sentence.

pg 27, para 2,
"State-of-the-art requires that"

pg40, para4,
"The watershed is reached when we add a conditional branch..."

pg 57,  para 2, last sent:
"even though preservation of dynamic range 
and accuracy is not the reason this is done."

pg 177,  para 4, 2nd sent:
"...represents crossing into a new watershed..."