| 摘要 |
This invention can easily form a smooth clear image with continuity particularly from a natural image without causing any interpolation blur or jaggy when converting input low-resolution information into high-resolution information. This invention includes a first window forming unit (102) for forming a first window for referring to nearest neighbor pixels of a low-resolution pixel of interest, a detecting unit (103) for detecting a plurality of representative values from the first window, a converting unit (105) for converting the value of the pixel of interest by an adaptive LPF, a second window forming unit (106) for forming a second window for referring to the converted values of the nearest neighbor pixels including the pixel of interest, and a high-resolution information forming unit (107) including a linear interpolating unit for performing linear interpolation on the basis of the pixel value information in the first window or the converted value information in the second window and a nonlinear interpolating unit for performing nonlinear interpolation by a product-sum operation of the linearly interpolated values from the linear interpolating unit and the representative values.
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