1. INTRODUCTION
Correlation is a fundamental tool and is widely used for image matching. Discrete cosine transform sign phase correlation (DCT-SPC) is a kind of limited correlation based on the phase difference between two sequences that are extended symmetrically [1] [2]. DCT-SPC is calculated using DCT signs, which lowers the computational load, and have an affinity with coded images. However, DCT-SPC function is affected by convolution terms due to its symmetry property.