Electronic document generation system, electronic document generation method, and program

An electronic document generation system for generating an electronic document based on a scanned image, comprising:

• a first layer generation unit configured to generate a character image layer that represents a character image in the scanned image by a predetermined number of bits;
• an edge image generation unit configured to generate an edge image of the character image;
• a second layer generation unit configured to generate an antialiasing layer that includes a binarized image generated based on the edge image and that is to be superimposed in a semi-transparent state on the character image layer;
• a file generation unit configured to generate the electronic document that includes the character image layer and the antialiasing layer;
• and
• a character color determination unit configured to determine a character color of the character image,
• wherein the second layer generation unit sets the same color as the character color for the antialiasing layer, and generates the antialiasing layer as a layer that is commonly applied to a plurality of character image regions that have the same character color and each have a different base color.

An electronic document generation system for generating an electronic document based on a scanned image, comprising:

• a first layer generation unit configured to generate a character image layer that represents a character image in the scanned image by a predetermined number of bits;
• an edge image generation unit configured to generate an edge image of the character image;
• a second layer generation unit configured to generate an antialiasing layer that includes a binarized image generated based on the edge image and that is to be superimposed in a semi-transparent state on the character image layer;
• and
• a file generation unit configured to generate the electronic document that includes the character image layer and the antialiasing layer,
• wherein the second layer generation unit determines a largest base region that is a base region having the largest area from among a plurality of base regions each having a different base color, and determines a largest character image region that is a character image region having the largest area from among a plurality of character image regions each having a different character color, and
• the second layer generation unit generates the antialiasing layer for one of the largest base region and the largest character image region that has a larger area.

A non-transitory computer-readable recording medium on which a computer program is recorded, the computer program executing the steps of:

• a) generating a character image layer that represents a character image in a scanned image by a predetermined number of bits;
• b) determining a base color of the character image;
• c) generating an edge image of the character image;
• d) generating an antialiasing layer that includes a binarized image generated based on the edge image and that is to be superimposed in a semi-transparent state on the character image layer;
• and
• e) generating an electronic document that includes the character image layer and the antialiasing layer,
• wherein the step d) includes the step of:
• d-1) setting the same color as the base color for the antialiasing layer.

An electronic document generation method for generating an electronic document based on a scanned image, implemented on a processor, and comprising the steps of:

• a) generating a character image layer, using a processor, which represents a character image in the scanned image by a predetermined number of bits;
• b) determining a base color of the character image;
• c) generating an edge image of the character image;
• d) generating an antialiasing layer that includes a binarized image generated based on the edge image and that is to be superimposed in a semi-transparent state on the character image layer;
• and
• e) generating an electronic document that includes the character image layer and the antialiasing layer,
• wherein the step d) includes the step of:
• d-1) setting the same color as the base color for the antialiasing layer.