Image input/output control method and image input/output apparatus

• US 7,532,348 B2
• Filed: 10/31/2007
• Issued: 05/12/2009
• Est. Priority Date: 02/28/2003
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Yaguchi, Hiroyuki
• Primary Examiner(s): Williams; Kimberly A
• Application Number:
  US11/930,551
• Publication Number:
  US 20080174823A1
• Time in Patent Office: 559 Days
• Field of Search: 358/1.1, 358/1.2, 358/1.9, 358/1.13, 358/1.15, 358/1.16, 358/1.17, 358/425.05, 358/426.03, 358/426.06, 358/426.14, 358/426.02, 358/444, 358/524, 382/166, 382/236, 382/239, 382/246, 382/256, 709/206, 386/46
• US Class Current: 358/1.15
• CPC Class Codes: H04N 1/32358 using picture signal storage, e.g. at transmitter H04N1/17 takes precedence
• CPC Class Codes: H04N 1/32448 Controlling data flow to or from the memory in relation to the available memory capacity
• 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 2201/3288 Storage of two or more complete document pages or image frames

Abstract

In the case in which an image processing mode is a high-speed copy mode in which follow-up control is possible, setting is made to perform “follow-up control” for setting a mode for not compressing an image or a fixed length compression mode for an image read by a scanner, storing an inputted image in a memory in accordance with the setting, and outputting the image stored in the memory to a printer during scanning. Consequently, image input/output processing from input and storage of an image in the memory until output of the stored image can be performed at high speed.

Claims

1. An image input/output control method for a device that transfers one page data to a memory and outputs the one page data from the memory, the method comprising:

compressing one page data using variable length compression, transferring the compressed one page data to the memory, and initiating output of the transferred one page data from the memory after the transfer of the compressed one page data terminates; and

transferring one page data to the memory without compressing the one page data, and initiating output of the transferred one page data transferred from the memory while the one page data is being transferred to the memory.

2. The method according to claim 1, wherein whether or not the variable length compression is performed is determined according to a copy mode.

3. The method according to claim 1, wherein whether or not the variable length compression is performed is determined according to copy magnification.

4. The method according to claim 1, wherein whether or not the variable length compression is performed is determined according to a platen mode.

5. The method according to claim 1, wherein whether or not the variable length compression is performed is determined according to a sheet size same as an original size.

6. The method according to claim 1, wherein whether or not the variable length compression is performed is determined according to no automatic concentration adjustment.

7. An image input/output control method for a device that transfers one page data to a memory and outputs the one page data from the memory, the method comprising:

determining, based on job settings, whether output of the one page data from the memory can be initiated while the one page data is being transferred to the memory;

controlling a compression mode for the one page data being transferred to the memory in accordance with the determination made in said determining step; and

controlling a timing for initiating output of the one page data from the memory in accordance with the determination made in said determining step.

8. An image input/output control method for a device that transfers one page data to a memory and outputs the one page data from the memory, the method comprising:

transferring, in a case where the size of an image is being changed, one page data to the memory, and initiating output of the transferred one page data from the memory after the transfer of the one page data terminates; and

transferring, in a case where size of an image is not being changed, one page data to the memory and initiating output of the transferred one page data transferred from the memory while the one page data is being transferred to the memory.

9. An image input/output control method for a device that transfers one page data to a memory and outputs the one page data from the memory, the method comprising:

transferring, in case of image rotation, one page data to the memory, and initiating output of the transferred one page data from the memory after the transfer of the one page data terminates; and

transferring, in case of no image rotation, one page data to the memory and initiating output of the transferred one page data transferred from the memory while the one page data is being transferred to the memory.

10. An image input/output control apparatus that transfers one page data to a memory and outputs the one page data from the memory, the apparatus comprising:

a compression unit adapted to compress one page data using variable length compression, transferring the compressed one page data to the memory, and initiating output of the transferred one page data from the memory after the transfer of the compressed one page data terminates; and

a transfer unit adapted to transfer one page data to the memory without compressing the one page data, and initiating output of the transferred one page data transferred from the memory while the one page data is being transferred to the memory.

11. The apparatus according to claim 10, wherein whether or not the variable length compression is performed is determined according to a copy mode.

12. The apparatus according to claim 10, wherein whether or not the variable length compression is performed is determined according to copy magnification.

13. The apparatus according to claim 10, wherein whether or not the variable length compression is performed is determined according to a platen mode.

14. The apparatus according to claim 10, wherein whether or not the variable length compression is performed is determined according to a sheet size same as an original size.

15. The apparatus according to claim 10, wherein whether or not the variable length compression is performed is determined according to no automatic concentration adjustment.