| 摘要 |
<p>An image processor, an image processing method, an image processing system, program, and a recording medium capable of obtaining an image of a wide dynamic range subjected to luminance compression. Assignment of the number of luminance gradation steps, of an output level signal for the level of an input luminance signal, to a main region and a second luminance region is differentiated from that to other ranges. For example, all the number of gradation steps is assigned by dividing to the luminance range of main region and the luminance range of the second luminance region but not assigned to other ranges, or the luminance range between the main region and the second luminance region is assigned the number of steps smaller than that for the luminance range of main region and the luminance range of the second luminance region. Furthermore, a boundary region of the luminance range of main region and the second luminance region may be set and assigned the number of steps smaller than that for the luminance range of main region and the second luminance region but larger than that for the region between them. The invention is applicable to an image processor.</p> |
