STF: Blackpoint value greater than Midpoint value?

Gordon Bowser

I'm working my through the Fundamentals videos, now on STF on a Gray image

I've found that after doing a Nuclear Stretch, the value for the Midpoint is LESS than the value for the Blackpoint.

How can that be correct?  Do you think that's a bug, or am I misunderstanding something here. 

I've taken a screenshot of the parameters....

thanks

Gordon

BlockHead

Hi Gordon,

The MidTones value is its position BETWEEN the black and white points. When you look at the STF little carats, the left one is the black level (which has a value compared to the original full range) and the same is true for the white point. The Midtones is relative to the these positions with the black point always equaling 0 and the white point being 1. 

I think this is the correct way to think of it. Let me know if that makes sense. 

See my picture that is attached. I made the black level 0.5 AND the midtone value is halfway between the new black point and the white point on the far right. So it also has a value of 0.5. 

Good question!

-the Blockhead

Gordon Bowser

That makes perfect sense, thanks

BlockHead

Great!