Pixels are weighted using contrast, saturation and well-exposedness measures, than images are combined using laplacian pyramids. The resulting image weight is constructed as weighted average of contrast, saturation and well-exposedness measures. The resulting image doesn't require tonemapping and can be converted to 8-bit image by multiplying by 255, but it's recommended to apply gamma correction and/or linear tonemapping.

public class MergeMertens : MergeExposures

Public Class MergeMertens
	Inherits MergeExposures

public ref class MergeMertens : public MergeExposures

type MergeMertens =  
    class
        inherit MergeExposures
    end