I came across this interesting article, A New Approach to Image-Based Estimation of Food Volume. 

In this paper, the authors introduced the importance of food volume measurement, the problem of current methods and have proposed a modelling algorithm with an accuracy of >90%. Have a read and share your thoughts with us.

References

Hassannejad, H., Matrella, G., Ciampolini, P., Munari, I., Mordonini, M. and Cagnoni, S. (2017). A New Approach to Image-Based Estimation of Food Volume. Algorithms, 10(2), p.66.