Electronic apparatus, method, and program

1. An electronic apparatus for performing a character recognition process for plural stroke data in a handwritten document including plural areas, the electronic apparatus comprising: one or more hardware processors configured to:

store a first handwritten document and first hash values for the plural areas of the first handwritten document in at least a working memory, wherein the first handwritten document is obtained by performing a character recognition process for the handwritten document;

calculate, at a character recognition process for a second handwritten document which is created by editing the first handwritten document, second hash values for the plural areas of the second handwritten document;

compare the first hash values in the working memory and the second hash values to detect an area wherein the first hash value is different from the second hash value;

use, for a first area wherein the first hash value is not different from the second hash value, at least a part of a character recognition result of the first areas of the first handwritten document; and

use, for a second area wherein the first hash value is different from the second hash value, a result of the character recognition process for the handwritten document.

2. The electronic apparatus of claim 1 , wherein

the working memory is configured to newly store a created handwritten document and overwrite a handwritten document read from the working memory,

the first handwritten document comprises a document stored in the working memory, and

the second handwritten document comprises a document to be overwritten in the working memory.

3. The electronic apparatus of claim 1 , wherein

the second handwritten document is displayed with displaying the second area in a display mode different from a display mode of another area, and

when the character recognition process for the second area is complete, the display mode of the second area is returned to an original display mode.

4. The electronic apparatus of claim 1 , wherein each of the plural areas comprise a row.

5. A method for performing a character recognition process for plural stroke data in a handwritten document including plural areas, the method comprising:

storing a first handwritten document and first hash values for the plural areas of the first handwritten document in at least a working memory, wherein the first handwritten document is obtained by performing a character recognition process for the handwritten document;

calculating, at a character recognition process for a second handwritten document which is created by editing the first handwritten document, second hash values for the plural areas of the second handwritten document;

comparing the first hash values in the working memory and the second hash values to detect an area wherein the first hash value is different from the second hash value;

using, for a first area wherein the first hash value is not different from the second hash value, at least a part of a character recognition result of the first handwritten document; and

using, for a second area wherein the first hash value is different from the second hash value, a result of the character recognition process for the handwritten document.

6. The method of claim 5 ,

wherein the first handwritten document comprises a document stored in the working memory, and the second handwritten document comprises a document to be overwritten in the working memory.

7. The method of claim 5 , further comprising:

displaying the second handwritten document with displaying the second area in a display mode different from a display mode of another stroke, and

returning the display mode of the second area to an original display mode when the character recognition process for the second area is complete.

8. The method of claim 5 , wherein each of the plural areas comprise a row.

9. A non-transitory computer-readable storage medium having stored thereon a computer program which performs a character recognition process for plural stroke data in a handwritten document including plural areas, and is executable by a computer, the computer program capable of causing the computer to execute functions of:

storing a first handwritten document and first hash values for the plural areas of the first handwritten document in at least a working memory, wherein the first handwritten document is obtained by performing a character recognition process for the handwritten document;

calculating, at a character recognition process for a second handwritten document which is created by editing the first handwritten document, second hash values for the plural areas of the second handwritten document;

comparing the first hash values in the working memory and the second hash values to detect an area wherein the first hash value is different from the second hash value;

using, for a first area wherein the first hash value is not different from the second hash value, at least a part of a character recognition result of the first handwritten document; and

using, for a second area wherein the first hash value is different from the second hash value, a result of the character recognition process for the handwritten document.

10. The storage medium of claim 9 ,

wherein the first handwritten document comprises a document stored in the working memory, and the second handwritten document comprises a document to be overwritten in the working memory.

11. The storage medium of claim 9 , further comprising:

displaying the second handwritten document with displaying the second area in a display mode different from a display mode of another stroke, and

returning the display mode of the second area to an original display mode when the character recognition process for the second area is complete.