Figure 5. Representation of the Haar function for two-dimensions and one level of resolution

From

Application of Haar Wavelets and Method of Moments for Computing Performance Characteristics of Electromagnetic Materials

Vishwa Nath Maurya, Avadhesh Kumar Maurya

American Journal of Applied Mathematics and Statistics. 2014, 2(3), 96-105 doi:10.12691/ajams-2-3-3