All Phase DCT Image Interpolation Algorithm
Hou Zheng-xin · Journal of Hunan University · 2007
A family of separable interpolation formulas based on DCT(discrete cosine transform) was proposed.The main idea was to use the philosophy of all phase to overcome the Gibbs phenomenon and to use the relation of discrete and continuous signals to reconstruct the original signal.The resolution conversion of natural image experiments have shown that the interpolation formulas proposed can keep the sharpness of the image.Furthermore,better image quality has been obtained by using them than by using bilinear and cubic interpolation,which is recommended in most interpolation tasks.The high quality of the interpolation image and the unified formulas will bring the interpolation formulas proposed appropriate applications in digital TV and other high quality interpolation tasks.