A Class of Haar Functions on Unit Disk
Wei Chen, Jian Li, Dongxu Qi · Journal of Image and Graphics · 2013
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.