Document processing apparatus and non-transitory computer readable medium

1. A document processing apparatus comprising

a processor configured to:

receive document data including a plurality of document pages which are going to be classified into a plurality of document sets, each document set including a predetermined plurality of document pages;

calculate a classification certainty of each document page, the classification certainty being an index indicative of accuracy of automatic determination of a page type;

classify the document data into a plurality of document sets by classifying each document page having the classification certainty that is greater than or equal to a threshold value into a corresponding set,

wherein a document page having the classification certainty that is less than the threshold value is an unclassified page; and

in a case where the document data includes the unclassified page, display a candidate document set to which the unclassified page is presumed to belong,

wherein for the candidate document set, a number of document pages which have been classified into the candidate document set from the document data is less than a number of the plurality of document pages of the document set corresponding to the candidate document set.

2. The document processing apparatus according to claim 1 , wherein

the processor is configured to display the candidate and the unclassified page on an identical screen.

3. The document processing apparatus according to claim 2 , wherein

the processor is configured to display the unclassified page in a manner such that the unclassified page is inserted into a position of a missing page of the candidate.

4. The document processing apparatus according to claim 1 , wherein

the processor is configured to display, as the candidate, a set that is similar in at least one of time and date of receipt, handwriting of a written character, and written contents to the unclassified page.

5. The document processing apparatus according to claim 1 , wherein

the processor is configured to display a ground for selection of the candidate.

6. The document processing apparatus according to claim 5 , wherein

the ground is a part in which the unclassified page and the candidate are similar to each other.

7. The document processing apparatus according to claim 1 , wherein

in a case where there are plural candidates for the document set, the processor is configured to give the candidates priority levels based on degrees of similarity to the unclassified page and arrange the candidates in a descending order of the priority levels.

8. The document processing apparatus according to claim 1 , wherein

in a case where no candidate has been extracted, the processor is configured to register the unclassified page in a predetermined storage.

9. A non-transitory computer readable medium storing a program causing a computer to execute a process for document processing, the process comprising:

receiving document data including a plurality of document sets, each document set including a predetermined plurality of document pages;

calculating a classification certainty of each document page, the classification certainty being an index indicative of accuracy of automatic determination of a page type;

classifying the document data into the plurality of document sets by classifying each document page having the classification certainty that is greater than or equal to a threshold value into a corresponding set,

wherein a document page having the classification certainty that is less than the threshold value is an unclassified page; and

in a case where the document data includes the unclassified page, displaying a candidate document set to which the unclassified page is presumed to belong,

wherein for the candidate document set, a number of document pages which have been classified into the candidate document set from the document data is less than a number of the plurality of document pages of the document set corresponding to the candidate document set.

10. A document processing apparatus comprising:

means for receiving document data including a plurality of document pages which are going to be classified into a plurality of document sets, each document set including a predetermined plurality of document pages;

means for calculating a classification certainty of each document page, the classification certainty being an index indicative of accuracy of automatic determination of a page type;

means for classifying the document data into the plurality of document sets by classifying each document page having the classification certainty that is greater than or equal to a threshold value into a corresponding set,

wherein a document page having the classification certainty that is less than the threshold value is an unclassified page; and

means for, in a case where the document data includes the unclassified page, displaying a candidate document set to which the unclassified page is presumed to belong,

wherein for the candidate document set, a number of document pages which have been classified into the candidate document set from the document data is less than a number of the plurality of document pages of the document set corresponding to the candidate document set.