Image processing apparatus, image processing method, and storage medium
First Claim
Patent Images
1. An image processing apparatus comprising:
- an image memory that stores an image corresponding to each page of a document and obtained by scanning the document;
a character recognition rate acquisition unit that segments the image stored in the image memory into a plurality (n) of partial images and acquires a character recognition rate for each partial image;
an image quality assessment unit that calculates a parameter showing the image quality of the image for said each page, based on the character recognition rates of the plurality of partial images acquired by the character recognition rate acquisition unit, and decides whether a scanning error is present by comparing the parameter with a threshold value; and
an output unit that outputs a number of a page containing the scanning error, and an assessment result determined based on the parameter, and also outputs a message inquiring as to whether re-scanning is necessary if the image quality assessment unit decides that the scanning error is present, whereinthe parameter is calculated using the formula;
Qs=1−
(α
max−
α
max) or
Qs=α
min/α
maxwhere a α
max and α
min are maximum and minimum values of character recognition rate α
i for each partial image, and Qs is a real number satisfying the condition 0≦
Qs≦
1,the character recognition rate a, is normalized using the formula;
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Abstract
An image processing apparatus includes image memory that stores an image; character recognition rate acquisition unit that segments the image stored in the image memory into a plurality of partial images and acquiring a character recognition rate for each partial image; image quality assessment unit that calculates a parameter showing the image quality of the image based on the character recognition rates of the plural partial images acquired by the character recognition rate acquisition unit; and output unit that outputs assessment results obtained by the image quality assessment unit.
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Citations
23 Claims
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1. An image processing apparatus comprising:
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an image memory that stores an image corresponding to each page of a document and obtained by scanning the document; a character recognition rate acquisition unit that segments the image stored in the image memory into a plurality (n) of partial images and acquires a character recognition rate for each partial image; an image quality assessment unit that calculates a parameter showing the image quality of the image for said each page, based on the character recognition rates of the plurality of partial images acquired by the character recognition rate acquisition unit, and decides whether a scanning error is present by comparing the parameter with a threshold value; and an output unit that outputs a number of a page containing the scanning error, and an assessment result determined based on the parameter, and also outputs a message inquiring as to whether re-scanning is necessary if the image quality assessment unit decides that the scanning error is present, wherein the parameter is calculated using the formula;
Qs=1−
(α
max−
α
max) or
Qs=α
min/α
maxwhere a α
max and α
min are maximum and minimum values of character recognition rate α
i for each partial image, and Qs is a real number satisfying the condition 0≦
Qs≦
1,the character recognition rate a, is normalized using the formula; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An image processing method comprising:
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scanning a document; storing an image corresponding to each page of the document based at least in part on the scanning of the document; segmenting the image into a plurality (n) of partial images; acquiring character recognition rates for the image; calculating a parameter showing the image quality of the image for said each page, based on the acquired character recognition rates of the plurality of partial images; deciding whether a scanning error is present by comparing the parameter with a threshold value; and outputting a number of a page containing the scanning error, and an assessment result determined based on the parameter, and also outputting a message inquiring as to whether re-scanning is necessary if a decision that the scanning error is present has been made, wherein the parameter is calculated using the formula;
Qs=1−
(α
max−
α
max) or
Qs=α
min/α
maxwhere α
max and α
min are maximum and minimum values of character recognition rate α
ifor each partial image, and Qs is a real number satisfying the condition 0≦
Qs≦
1,the character recognition rate a, is normalized using the formula; - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A non-transitory computer readable storage medium storing a computer readable program executable by a computer for causing the computer to execute a process, the process comprising:
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scanning a document; storing an image corresponding to each page of the document based at least in part on the scanning of the document; segmenting the image into a plurality (n) of partial images; acquiring character recognition rates for the image; calculating a parameter showing the image quality of the image for said each page, based on the acquired character recognition rates of the plurality of partial images; deciding whether a scanning error is present by comparing the parameter with a threshold value; and outputting a number of a page containing the scanning error, and an assessment result determined based on the parameter, and also outputting a message inquiring as to whether re-scanning is necessary if a decision that the scanning error is present has been made;
whereinthe parameter is calculated using the formula;
Qs=1−
(α
max−
α
max) or
Qs=α
min/α
maxwhere α
max and α
min are maximum and minimum values of character recognition rate α
ifor each partial image, and Qs is a real number satisfying the condition 0≦
Qs≦
1,the character recognition rate α
i, is normalized using the formula; - View Dependent Claims (23)
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Specification