Encoding device, decoding device, encoding method, decoding method, and storage medium storing programs thereof

• US 20090317006A1
• Filed: 08/25/2009
• Published: 12/24/2009
• Est. Priority Date: 06/13/2005
• Status: Active Grant

• Current Assignee: Fujifilm Business Innovation Corp. (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Inventors: Koshi, Yutaka, Kimura, Shunichi, Sekino, Masanori
• Granted Patent: US 7,957,602 B2
• Time in Patent Office: Days
• US Class Current: 382/233
• CPC Class Codes: H04N 1/32203 Spatial or amplitude domain methods H04N1/32309 takes precedence
• CPC Class Codes: H04N 1/32256 in halftone data
• CPC Class Codes: H04N 1/32325 the embedded data being visible
• CPC Class Codes: H04N 1/403 Discrimination between the two tones in the picture signal of a two-tone original
• CPC Class Codes: H04N 1/41 Bandwidth or redundancy reduction by scanning H04N1/17 ; methods or arrangements for coding, decoding, compressing or decompressing digital video signals H04N19/00
• CPC Class Codes: H04N 2201/3236 Details of authentication information generation

Abstract

An encoding device includes a binary image generation unit that generates at least two binary images from a multivalued image by applying different methods, a check image generation unit that generates a check image based on the plural binary images generated by the binary image generation unit, and a code generation unit that generates coded data by encoding at least one of the binary images generated by the binary image generation unit and the check image generated by the check image generation unit by using different methods.

Claims

1. A decoding device comprising:

a reception unit that receives coded data including a plurality of image data pieces encoded by applying different methods;

an image decoding unit that decodes the respective image data pieces included in the coded data received by the reception unit by different methods; and

a synthesizing unit that synthesizes the images decoded by the image decoding unit.

2. The decoding device according to claim 1, wherein the reception unit receives coded data including a browsing binary image and a binary check image encoded by applying different methods.

3. The decoding device according to claim 2, wherein the image decoding unit comprises:

a browsing image decoding unit that decodes the browsing binary image included in the coded data received by the reception unit; and

a detecting image decoding unit that decodes the binary check image included in the coded data received by the reception unit.

4. The decoding device according to claim 3, wherein the browsing image decoding unit applies text area decoding or generic area decoding specified by JBIG2.

5. The decoding device according to claim 4, wherein the detecting image decoding unit applies refinement area decoding specified by JBIG2.

6. The decoding device according to claim 3, wherein the synthesizing unit synthesizes the browsing binary image decoded by the browsing image decoding unit and the binary check image decoded by the detecting image decoding unit.

7. A decoding method comprising:

receiving coded data including a plurality of image data pieces encoded by applying different methods;

decoding the respective image data pieces included in the received coded data by different methods; and

synthesizing the decoded images.

8. A storage medium readable by a computer, the storage medium storing a program of instructions executable by the computer to perform a function for decoding, the function comprising:

receiving coded data including a plurality of image data pieces encoded by applying different methods;

decoding the respective image data pieces included in the received coded data by different methods; and

synthesizing the decoded images.