| 摘要 |
An image processing apparatus includes a storing unit for storing a chromaticity measured in advance with respect to a blank printed in a dropout color on a sheet, or with respect to a visual information filled in the blank, and a unit for judging coincidence or non-coincidence of the chromaticity stored in the storing unit with each chromaticity of respective picture elements constituting an image information obtained by reading the sheet. Where the storing unit stores a chromaticity regarding the blank, the image processing apparatus further includes a unit for detecting an arrangement region of the blank on the sheet based on results of the judging, then extracting an image information corresponding to the arrangement region, and carrying out a dropout processing with respect to the extracted image information to thereby extract the visual information. Where the storing unit stores a chromaticity regarding the visual information, the image processing apparatus further includes a unit for extracting the visual information based on results of the judging. By the constitution, it is possible to relieve various restrictions regarding the sheet and the reading thereof, and to carry out the dropout processing with a high precision, while reducing a running cost and a management cost pertaining to the sheet. This contributes to an improvement in the degree of recognition of the image information in the pattern recognition.
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