how to get the point at the region shown in the image ?

i have converted the image from rgb to hsv first and then i applied the hue. now i need to point the region shown in the red region , the red mark is only drawn to let you know what region i want from image , it is not in the original image from which i want to extract the region.

The hsv image :

The image with region marked that i want

The original image from which i want the region