| 摘要 |
If the processing time of a labeling process performed on a target rectangle found to be an image of a character/line drawing is equal to or longer than a given threshold, an unprocessed region of the target rectangle which has not yet been labeled is analyzed (S 401 ). In accordance with the analytical result, a color reducing process or resolution reducing process is performed on the unprocessed region (S 402 , S 403 , S 404 ). A labeling process is performed on the processing result (S 302 ). Vector data is generated on the basis of the labeling process result (S 306 ).
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