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Hough Transform after removal of color

I have a hough transform object detection code which detects the target objects. But a few lines are detected from the green background (trees). I wish to eliminate all the green background. I tried a code based on this and it worked fine. But the problem is that the resulting image is black and white. I want the green part to go black, but I want the rest to remain as the original image.

I also tried the second solution from this, with the image given there. The problem was whenever I accessed the result image and displayed it with imshow, it would display like the original.

So, are there any better solutions? Is there a way that I can see all pixels that fall in an hsv range, using inRange and then, instead of turning the whole image black and white, just turn those pixels in the range to black?