hi there

i have just a problem, how to segmentate water out of sat images, like this :

or like

 the problems are colors : water color which is very problematic, cause teh color values vary from blue to green and yellow 

i have get to this

 using method :

but actualy this dont work so well by the second image (squared)

do you have any better aproach? thx much 

Those images are extremely difficult to process give the color tones and shapes of the images. We messed around with these images for some time and were not able to get much better results that you were able to. I wish we had better news for you but at this time we cannot offer any other suggestions.