What you are referring to is not a 'Control Point'. From my understanding, the intent of the rule regarding control points is the continuation of not allowing us to selectively edit a portion of the image. Control points are found in Nik Software backed programs such as Nikon Capture NX (as well as others) and they allow you to easily select parts of the image with the aid of the software. It saves a lot of time by relieving you of the need to painstakingly define what you are selecting because the software attemps to anticipate what you are trying to select.
Again, the key word here as it relates to the theme of basic challenges is 'select'. Very generally, if you can selectively edit a portion of the image, it's not legal in basic. The eye drop tool is used to sample something in the image to indicate to the software an area of reference by which to make adjustments. If you are using it to communicate to the software where your black, white and grey points are then it is legal to use. |
