Image quality improvement apparatus, image display apparatus, image high-quality image quality improvement method and computer program

摘要

To provide an image quality improvement apparatus, an image display apparatus, an image quality improvement method and a computer program practicing a learning type image quality improvement method using sparse representation.An image quality improving apparatus 1 calculates coefficients of a low-quality base vector (first feature quantity) expressing a feature quantity in a linear sum from a feature quantity of an image, and calculates a high image quality And calculates the linear sum of the basis vectors (second feature quantities) of the input image to generate an image with high image quality. In calculating the coefficients, the number of base vectors whose coefficients are not zero is determined, the determined number of basis vectors are selected, and the coefficients of the basis matrix other than the selected base vectors are set to zero, calculate. By adjusting the number of base vectors whose coefficients are not zero, it is possible to reduce the amount of processing required to obtain a sparse solution of the coefficient matrix and realize a practical image quality enhancing apparatus 1 .(Fig.