The multiview conjecture for the Euclidean distance degree

Let $X_m$ be the affine multiview variety of $m\geq 3$ cameras in general position, and let $\operatorname{EDdeg}(X_m)$ denote its Euclidean distance degree. Multiview conjecture. The Euclidean distance degree is

$$\operatorname{EDdeg}(X_m)=\frac{9}{2}m^3-\frac{21}{2}m^2+8m-4.$$

This explicit formula was proposed from numerical computations for configurations involving $m\leq 7$ cameras. Its validity for general $m$ is not established in the supplied text.