The implementation in this assignment focuses on a relaxation method described by Horn in section 11.7 in [3]. The technique minimizes a smoothness energy function and which is the energy function for the image irradiance. The two functions are combined with , where is a parameter that weights the errors. With use of variational calculus, a solution is expressed in terms of differential equations. A solution can also be obtained by minimizing the discretised energy functions. This approach was chosen for the assignment since it is written out explicitly in the book.

a4-shapefromshading.pdf

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