The light reflected from a surface is assumed to have three components that result in the observed reflection: (1) an ambient component, which is a constant term added to all reflections; (2) a diffuse component, which is the Lambertian reflection of [Equation 5.1](https://visionbook.mit.edu/imaging.html#eq-Lambert); and (3) a specular reflection component. For a given ray direction, , from the surface
I believe this is meant to be referring to [Equation 5.2]. [Equation 5.1] is the general BRDF function, [Equation 5.2] is the Lambertian model.
As an aside, thank you for this wonderful book! It has been the best book I've read in my entire undergraduate for approaching deep learning & CV.
The light reflected from a surface is assumed to have three components that result in the observed reflection: (1) an ambient component, which is a constant term added to all reflections; (2) a diffuse component, which is the Lambertian reflection of [Equation 5.1](https://visionbook.mit.edu/imaging.html#eq-Lambert); and (3) a specular reflection component. For a given ray direction, , from the surface
I believe this is meant to be referring to [Equation 5.2]. [Equation 5.1] is the general BRDF function, [Equation 5.2] is the Lambertian model.
As an aside, thank you for this wonderful book! It has been the best book I've read in my entire undergraduate for approaching deep learning & CV.