Image processing device, image reading device, image forming device, and image processing method
AssigneeSharp Kabushiki Kaisha
InventorsMakio Gotoh, Kenji Kimura, Masanori Minami
Life of this patent
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Abstract
An original is illuminated by a light source α or a light source β, and image data is obtained under these conditions. An absolute value of a difference between image data under these different conditions is compared to a threshold value, and it is judged whether or not a color-unmatch occurs. If the color-unmatch occurs, the color-unmatch is corrected in accordance with a plurality of image data read under different conditions.
Claims8
An image processing device, in which first image data obtained by reading an original under a first reading condition and second image data obtained by reading the original under a second reading condition are used as a set of input image data,
- said image processing device comprising:
- a judging section for judging the presence or absence of a color-unmatch by comparing the first image data and the second image data in terms of at least one color component signal;
- and
- a data converting section for converting, into image data of a reference color space, the first image data and the second image data in the set of input image data by using at least one color component signal in the first image data and at least one color component signal in the second image data, in a case where the judging section finds a color-unmatch between the first image data and the second image data.
An image reading device comprising:
- a reading section for reading an original to obtain image data;
- and
- an image processing device for carrying out image processing to correct the image data read by the reading section,
- the image processing device in which first image data obtained by reading the original under a first reading condition and second image data obtained by reading the original under a second reading condition are used as a set of input image data,
- said image processing device comprising:
- a judging section for judging the presence or absence of a color-unmatch by comparing the first image data and the second image data in terms of at least one color component signal;
- and
- a data converting section for converting into image data of a reference color space, the first image data and the second image data in the set of input image data by using at least one color component signal in the first image data and at least one color component signal in the second image data, in a case where the judging section finds a color-unmatch between the first image data and the second image data.
An image forming device comprising:
- an image processing device for carrying out image processing to correct input image data;
- and
- an output section for carrying out a print job by outputting the image data corrected by the image processing device,
- the image processing device in which first image data obtained by reading an original under a first reading condition and second image data obtained by reading the original under a second reading condition are used as a set of input image data,
- said image processing device comprising:
- a judging section for judging the presence or absence of a color-unmatch by comparing the first image data and the second image data in terms of at least one color component signal;
- and
- a data converting section for converting into image data of a reference color space, the first image data and the second image data in the set of input image data by using at least one color component signal in the first image data and at least one color component signal in the second image data, in a case where the judging section finds a color-unmatch between the first image data and the second image data.
An image processing method, in which first image data obtained by reading an original under a first reading condition and second image data obtained by reading the original under a second reading condition are used as a set of input image data,
- said method comprising the steps of:
- judging the presence or absence of a color-unmatch by comparing the first image data and the second image data in regard to at least one color component signal;
- and
- converting into image data of a reference color space, the first image data and the second image data in the set of input image data by using at least one color component signal in the first image data and at least one color component signal in the second image data, in a case where the judging step finds a color-unmatch between the first image data and the second image data.
A computer executable program stored in a computer readable medium in which first image data obtained by reading an original under a first reading condition and second image data obtained by reading the original under a second reading condition are used as a set of input image data,
- said program causing a computer to carry out the steps of:
- judging the presence or absence of a color-unmatch by comparing the first image data and the second image data in regard to at least one color component signal;
- and
- converting into image data of a reference color space, the first image data and the second image data in the set of input image data by using at least one color component signal in the first image data and at least one color component signal in the second image data, in a case where the judging step finds a color-unmatch between the first image data and the second image data.
A computer readable recording medium storing a computer-executable program,
- said program causing a computer to carry out the steps of:
- judging the presence or absence of a color-unmatch by comparing the first image data and the second image data in regard to at least one color component signal;
- and
- converting into image data of a reference color space, the first image data and the second image data in the set of input image data by using at least one color component signal in the first image data and at least one color component signal in the second image data, in a case where the judging step finds a color-unmatch between the first image data and the second image data.
Dependencies are inferred from the claim text.