the QUALITY CONTROL image you provided is 296% black on the left where it says "CONT..." then it tops at 300% at the "...ROL".
I can see the slight shift on the edges of the word QUALITY as I drag it across the screen..and even that text is at 291% to 294 to the right.
not sure if these are to illustrate or to guide, as the image itself is skewed
Ah! As I've said, professionals like numbers!
No, this test is very simple. This is a part of a test pattern and it has gradient.
You can see more or less of this word depending on calibration (I assume your gamma is too low now).
The point is that this word appears and disappears (partially or completely) when you look from front/side.