Patent ID: 7170647
Filing Date: 2007-01-30
Classification: H04N

Abstract:
1. A document processing apparatus comprising: determining means for determining a plurality of threshold values on the basis of a luminance distribution of a color image; binarization means for obtaining a plurality of binary image data by binarizing the color image based on each of the plurality of threshold values determined by said determining means; extracting means for extracting region information based on components included in the plurality of binary image data, the region information indicating a position and a size of regions having different background colors; generation means for generating second binary image data based on the plurality of binary image data and the region information by executing binarization processes in each of the regions associated with the region information extracted by said extracting means, wherein said generation means comprises means for determining each binarization threshold value for each partial region of the color image corresponding to each of the regions associated with the region information extracted by said extracting means; and wherein the second binary image data is generated by binarizing each of the partial regions using the set determined threshold value; and segmentation processing means for performing region segmentation based on the second binary image data generated by said generation means and the region information extracted by said extracting means.