Image processing apparatus and method, image processing program, and storage medium

An image processing apparatus which includes an image reading apparatus, comprising:

• an image designating mechanism configured to designate a type of image of book document from the image reading apparatus;
• a reference data extractor configured to extract reference data obtained by the image of the book document;
• a book image corrector configured to extract reference data from an image read by the image reading apparatus, to analyze the image, and to perform an image correction when the image is determined as an image of a book document according to an analysis result, the book image corrector comprising:
• a first corrector configured to correct in a main scanning direction a distortion of the image of the book document based on the reference data extracted from the image of the book document;
• and
• a second corrector having a plurality of different correction modes configured to correct a distortion of the image of the book document in a sub-scanning direction, and
• wherein the reference data extractor extracts the reference data based on the type of image designated by the image designating mechanism.

An image processing apparatus which includes image reading means, comprising:

• first memory means for storing optical positioning information of the image reading means;
• correcting means for performing an image correction based on reference data from an image read by the image reading means when the image is of a book document, the book image corrector comprising:
• first correcting means for correcting in a main scanning direction a distortion of the image of the book document based on the reference data;
• second correcting means having a plurality of different correction modes for correcting a distortion of the image of the book document in a sub-scanning direction;
• and
• selecting means for selecting one of the plurality of different correction modes of the second correcting means based on the optical positioning information stored in the first memory means.

An image processing apparatus which includes image reading means, comprising:

• image designating means for designating a type of image of book document from the image reading means;
• reference data extracting means for extracting reference data obtained by the image of the book document;
• book image correcting means for extracting reference data from an image read by the image reading means, analyzing the image, and performing an image correction when the image is determined as an image of a book document according to an analysis result, the book image correcting means further comprising:
• first correcting means for correcting in a main scanning direction a distortion of the image of the book document based on the reference data extracted from the image of the book document;
• and
• second correcting means having a plurality of different correction modes for correcting a distortion of the image of the book document in a sub-scanning direction, and
• wherein the reference data extracting means extracts the reference data based on the type of image designated by the image designating means.

An image processing method, comprising the steps of:

• storing optical positioning information of an image reading apparatus;
• reading an image of a book document;
• extracting reference data from an image read by the reading step;
• analyzing the image;
• selecting one of a plurality of different correction modes based on the optical positioning information stored in the storing step;
• and
• performing an image correction when the image is determined as an image of a book document according to an analysis result performed by the analyzing step, the performing step comprising the steps of:
• first correcting in a main scanning direction a distortion of the image of the book document based on the reference data extracted from the image of the book document;
• and
• second correcting a distortion of the image of the book document in a sub-scanning direction.

An image processing method, comprising the steps of:

• designating a type of image of book document from an image reading apparatus;
• reading an image of the book document;
• extracting reference data obtained by the image of the book document;
• selecting one of a plurality of different correction modes based on the optical positioning information stored in the storing step;
• and
• performing an image correction when the image is of a book document, said performing comprising the steps of:
• first correcting in a main scanning direction a distortion of the image of the book document based on the reference data extracted from the image of the book document;
• second correcting a distortion of the image of the book document in a sub-scanning direction;
• and
• wherein the extracting step extracts the reference data based on the type of image designated by the designating step.

A program of an image correction causing a computer to execute an image correction according to a method, comprising the steps of:

• storing optical positioning information of an image reading apparatus;
• reading an image of a book document;
• extracting reference data from an image read by the reading step;
• analyzing the image;
• selecting one of a plurality of different correction modes based on the optical positioning information stored in the storing step;
• and
• performing an image correction when the image is determined as an image of a book document according to an analysis result performed by the analyzing step, the performing step comprising the steps of:
• first correcting in a main scanning direction a distortion of the image of the book document based on the reference data extracted from the image of the book document;
• and
• second correcting a distortion of the image of the book document in a sub-scanning direction.