| 摘要 |
PURPOSE:To realize sharpness corresponding to the chevron pattern of a light- and-shade level using the maximum value in the neighborhood of each image element, by applying a specific equation on the density value of an input image. CONSTITUTION:To a processor 10, the input image F={fi, j} is inputted. In such a case, fi, j represents the density value in the image element (i, j), and (i) and (j) represent natural numbers. the processor 10 performs a processing shown in equation I on the input F, and outputs an output in which natural sharpness corresponding to the chevron pattern of the input image is applied to a display medium 12. Also, it performs the processing by equation II for the result of the equation I, then, performs the compression of a dynamic range. In such a case Ni, j represents the set of values fi, j in the neighborhood of a point (i, j), and Max(Ni, j) the maximum value of the Ni, j, and (alpha) and (beta) represent parameters possible to be changed from a console 14.
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