Abstract—In order to investigate the effective circular image analysis method, a class of Haar functions defined on the unit disk, named as disk Haar Functions (DHFs), is introduced in this paper. Compared with traditional bivariate tensor product orthogonal functions (TPOFs), DHFs have great advantages in handling the circular images. Experimental results demonstrate that DHFs is more suitable for representing images on circular region than TPOFs.

Index Terms—circular image, haar functions, orthogonal

Cite: Chen Wei, Li Jian, and Qi Dongxu, "A Class of Haar Functions on Unit Disk," Journal of Image and Graphics, Vol. 1, No. 2, pp. 68-71, June 2013. doi: 10.12720/joig.1.2.68-71