| 摘要 |
An apparatus to compress a dynamic range of an image, and a method of compressing the dynamic range. The apparatus includes a periphery value production unit to calculate periphery information about peripheral pixels on a polyhedron-by-polyhedron basis using summed area tables produced form an analog pixel stream of a previous frame of the image, multiply the periphery information by predetermined weight values, sum results of the multiplications, and output the sum as a periphery value; and a pixel value correction unit to correct a pixel value of a target pixel included in an analog pixel stream of a current frame using the periphery value; wherein the peripheral pixels are located around the target pixel and included in the previous frame, and a kernel distribution expressed in a kernel function, which is a distribution of weight values dependent on locations of pixels included in the image, is approximated to a sum of the polyhedrons.
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