Patent ID: 8086032

Claim:
An image processing device comprising: an illumination component extractor for extracting an illumination component from input image data; a reflectance component extractor for extracting a reflectance component from the input image data based on the illumination component extracted by the illumination component extractor; a compressor for compressing a dynamic range of the illumination component extracted by the illumination component extractor; and a combiner for combining the illumination component whose dynamic range is compressed by the compressor with the reflectance component extracted by the reflectance component extractor, wherein: the illumination component extractor is provided with: a smoothing section for performing a smoothing process a certain number of times to generate a plurality of smooth image data having resolutions different from one another from the input image data, the smoothing section including a filtering section for filtering the input image data with use of a low-pass filter, and a downsampling section for downsampling the filtered input image data; and an inverse-smoothing section for performing an inverse-smoothing process a certain number of times, the inverse-smoothing section including an edge operating section for replacing an edge portion of a smooth image data having a lower resolution with a smooth image data having a higher resolution, and an upsampling section for upsampling the replaced smooth image data.