import cv, cv2

img = cv.imread("cones_plus_shadowed_barrel.jpg", cv2.CV_LOAD_IMAGE_COLOR)

cv.namedWindow('Normal Image')

cv.imshow('Normal Image', img)

hsv_img = img

cv.CvtColor(img,hsv_img,cv.CV_RGB2HSV)

cv.namedWindow('HSV Image')

cv.imshow('HSV Image', hsv_img)

cv.waitKey(0)

cv.destroyAllWindows()