Image processing apparatus, image reading apparatus and image forming apparatus

• US 20040105587A1
• Filed: 08/15/2003
• Published: 06/03/2004
• Est. Priority Date: 08/20/2002
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Nomizu, Yasuyuki
• Granted Patent: US 7,477,788 B2
• Time in Patent Office: Days
• US Class Current: 382/232
• CPC Class Codes: G06T 1/60 Memory management
• CPC Class Codes: H04N 1/2104 for one or a few pictures
• CPC Class Codes: H04N 19/12 Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
• CPC Class Codes: H04N 19/156 Availability of hardware or computational resources, e.g. encoding based on power-saving criteria
• CPC Class Codes: H04N 19/162 User input
• CPC Class Codes: H04N 19/172 the region being a picture, frame or field
• CPC Class Codes: H04N 19/60 using transform coding
• CPC Class Codes: H04N 2201/0091 Digital copier; digital 'photocopier' H04N2201/0093 and H04N2201/0094 take precedence
• CPC Class Codes: H04N 2201/214 Checking or indicating the storage space

Abstract

An image processing apparatus for processing image data is described. The image processing apparatus comprises:

a compression/decompression part for compressing the image data into code data having a plurality of kinds of formats and decompressing the code data into the image data, the plurality of kinds of formats comprise at least a reversible encoding method and an irreversible encoding method of a JPEG 2000 format; and

a conversion part for performing a conversion of a format of the code data from one format in the plurality of kinds of data formats to another format in the plurality of kinds of data formats using the compression/decompression part, the conversion comprises a conversion of the format of the code data from the reversible encoding method into the irreversible encoding method or from the irreversible encoding method into the reversible encoding method of the JPEG 2000 format.

Claims

1. An image processing apparatus for processing image data, comprising:

a compression/decompression part for compressing said image data into code data having a plurality of kinds of formats and decompressing said code data into said image data, said plurality of kinds of formats comprise at least a reversible encoding method and an irreversible encoding method of a JPEG 2000 format; and

a conversion part for performing a conversion of a format of said code data from one format in said plurality of kinds of data formats to another format in said plurality of kinds of data formats using said compression/decompression part, said conversion comprises a conversion of said format of said code data from said reversible encoding method into said irreversible encoding method or from said irreversible encoding method into said reversible encoding method of said JPEG 2000 format.

2. The image processing apparatus as claimed in claim 1, further comprising:

an output part for externally outputting said code data having said format converted by said conversion part.

3. The image processing apparatus as claimed in claim 1, wherein said image processing apparatus is in communication with a storage apparatus for storing image data, the image processing apparatus further comprising:

a code storage part for storing said code data in said storage apparatus, wherein said code storage part causes said compression/decompression part to encode said image data with the reversible encoding method into said code data and stores said code data in said storage apparatus if a memory capacity of said storage apparatus is greater than a predetermined threshold value, and said code storage part causes said compression/decompression part to encode said image data with the irreversible encoding method into said code data and stores said code data in said storage apparatus if said memory capacity of said storage apparatus is less than or equal to said predetermined threshold value.

4. The image processing apparatus as claimed in claim 2, wherein said image processing apparatus is in communication with a storage apparatus for storing image data, the image processing apparatus further comprising:

a code storage part for storing said code data in said storage apparatus, wherein said code storage part causes said compression/decompression part to encode said image data with the reversible encoding method into said code data and stores said code data in said storage apparatus if a memory capacity of said storage apparatus is greater than a predetermined threshold value, and said code storage part causes said compression/decompression part to encode said image data with the irreversible encoding method into said code data and stores said code data in said storage apparatus if said memory capacity of said storage apparatus is less than or equal to said predetermined threshold value.

5. The image processing apparatus as claimed in claim 1, wherein said image processing apparatus is in communication with a storage apparatus for storing image data, the image processing apparatus further comprising:

a first code storage part for storing said code data in said storage apparatus, wherein said first code storage part causes said compression/decompression part to encode said image data stored in said storage apparatus with the reversible encoding method into said code data and stores said code data in said storage apparatus;

a rewrite part that stops said first code storage part and converts a format of said code data stored in said storage apparatus into a format of said code data corresponding to said irreversible encoding method using said conversion part if unused memory space of said storage apparatus is less than a first predetermined threshold value, after said first code storage part started storing; and

a second code storage part for storing said code data in said storage apparatus, wherein said second code storage part restarts said compression/decompression part to encode a remaining part of said image data with the irreversible encoding method into said code data and stores said code data in said storage apparatus if said unused memory space of said storage apparatus is greater than a second predetermined threshold value that is greater than said first predetermined threshold value, after said rewrite part started converting.

6. The image processing apparatus as claimed in claim 2, wherein said image processing apparatus is in communication with a storage apparatus for storing image data, the image processing apparatus further comprising:

a first code storage part for storing said code data in said storage apparatus, wherein said first code storage part causes said compression/decompression part to encode said image data stored in said storage apparatus with the reversible encoding method into said code data and stores said code data in said storage apparatus;

a rewrite part that stops said first code storage part and converts a format of said code data stored in said storage apparatus into a format of said code data corresponding to said irreversible encoding method using said conversion part if unused memory space of said storage apparatus is less than a first predetermined threshold value, after said first code storage part started storing; and

a second code storage part for storing said code data in said storage apparatus, wherein said second code storage part restarts said compression/decompression part to encode a remaining part of said image data with the irreversible encoding method into said code data and stores said code data in said storage apparatus if said unused memory space of said storage apparatus is greater than a second predetermined threshold value that is greater than said first predetermined threshold value, after said rewrite part started converting.

7. The image processing apparatus as claimed in claim 5, further comprising:

an acceptance part for accepting a selection for selecting an image data that is desired by a user from said image data stored in said storage apparatus if said unused memory space of said storage apparatus is smaller than said first predetermined threshold value, after said first code storing part started storing, and

said rewrite part converts a format of said image data stored in said storage apparatus that is selected according to said selection accepted by said acceptance part into a format of said image data corresponding to said irreversible encoding method using said conversion part.

8. The image processing apparatus as claimed in claim 6, further comprising:

an acceptance part for accepting a selection for selecting an image data that is desired by a user from said image data stored in said storage apparatus if said unused memory space of said storage apparatus is smaller than said first predetermined threshold value, after said first code storing part started storing, and

said rewrite part converts a format of said image data stored in said storage apparatus that is selected according to said selection accepted by said acceptance part into a format of said image data corresponding to said irreversible encoding method using said conversion part.

9. An image reading apparatus comprising:

a photoelectric conversion device that reads an image of a document;

a storage apparatus that stores image data of said read image of the document; and

the image processing apparatus as claimed in claim 1 that processes at least a part of image data that is input to said image reading apparatus and output from said image reading apparatus.

10. An image reading apparatus comprising:

a photoelectric conversion device that reads an image of a document;

a storage apparatus that stores image data of said read image of the document; and

the image processing apparatus as claimed in claim 2 that processes at least a part of image data that is input to said image reading apparatus and output from said image reading apparatus.

11. An image reading apparatus comprising:

a photoelectric conversion device that reads an image of a document;

a storage apparatus that stores image data of said read image of the document; and

the image processing apparatus as claimed in claim 3 that processes at least a part of image data that is input to said image reading apparatus and output from said image reading apparatus.

12. An image reading apparatus comprising:

a photoelectric conversion device that reads an image of a document;

a storage apparatus that stores image data of said read image of the document; and

the image processing apparatus as claimed in claim 4 that processes at least a part of image data that is input to said image reading apparatus and output from said image reading apparatus.

13. An image reading apparatus comprising:

a photoelectric conversion device that reads an image of a document;

a storage apparatus that stores image data of said read image of the document; and

the image processing apparatus as claimed in claim 5 that processes at least a part of image data that is input to said image reading apparatus and output from said image reading apparatus.

14. An image reading apparatus comprising:

a photoelectric conversion device that reads an image of a document;

a storage apparatus that stores image data of said read image of the document; and

the image processing apparatus as claimed in claim 6 that processes at least a part of image data that is input to said image reading apparatus and output from said image reading apparatus.

15. An image reading apparatus comprising:

a photoelectric conversion device that reads an image of a document;

a storage apparatus that stores image data of said read image of the document; and

the image processing apparatus as claimed in claim 7 that processes at least a part of image data that is input to said image reading apparatus and output from said image reading apparatus.

16. An image reading apparatus comprising:

a photoelectric conversion device that reads an image of a document;

a storage apparatus that stores image data of said read image of the document; and

the image processing apparatus as claimed in claim 8 that processes at least a part of image data that is input to said image reading apparatus and output from said image reading apparatus.

17. An image forming apparatus comprising:

the image reading apparatus as claimed in claim 9;

and

a printer engine that forms an image that is read by said photoelectric conversion device on a paper.

18. An image forming apparatus comprising:

the image reading apparatus as claimed in claim 10;

and

a printer engine that forms an image that is read by said photoelectric conversion device on a paper.

19. An image forming apparatus comprising:

the image reading apparatus as claimed in claim 11;

and

a printer engine that forms an image that is read by said photoelectric conversion device on a paper.

20. An image forming apparatus comprising:

the image reading apparatus as claimed in claim 12;

and

a printer engine that forms an image that is read by said photoelectric conversion device on a paper.

21. An image forming apparatus comprising:

the image reading apparatus as claimed in claim 13;

and

a printer engine that forms an image that is read by said photoelectric conversion device on a paper.

22. An image forming apparatus comprising:

the image reading apparatus as claimed in claim 14;

and

a printer engine that forms an image that is read by said photoelectric conversion device on a paper.

23. An image forming apparatus comprising:

the image reading apparatus as claimed in claim 15;

and

a printer engine that forms an image that is read by said photoelectric conversion device on a paper.

24. An image forming apparatus comprising:

the image reading apparatus as claimed in claim 16;

and

a printer engine that forms an image that is read by said photoelectric conversion device on a paper.