Image encoding apparatus

• US 7,873,226 B2
• Filed: 02/23/2006
• Issued: 01/18/2011
• Est. Priority Date: 09/30/2005
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Shimada, Miwa
• Primary Examiner(s): Ahmed; Samir A.
• Assistant Examiner(s): Bayat; Ali
• Application Number:
  US11/359,588
• Publication Number:
  US 20070076965A1
• Time in Patent Office: 1,790 Days
• Field of Search: 382/239, 382/232, 382/254, 382/266, 382/190, 382/199, 382/263, 348/606, 348/624, 358/1.9, 358/3.31, 358/447, 358/461, 358/463
• US Class Current: 382/239
• CPC Class Codes: G06T 2207/10016 Video; Image sequence
• CPC Class Codes: G06T 7/13 Edge detection
• CPC Class Codes: H04N 19/115 Selection of the code volume for a coding unit prior to coding
• CPC Class Codes: H04N 19/14 Coding unit complexity, e.g. amount of activity or edge presence estimation H04N19/146 takes precedence
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/85 using pre-processing or post-processing specially adapted for video compression

Abstract

An image encoding apparatus includes a detection unit detecting edge block candidates as blocks including an edge in an image composed of plural blocks, and a determination unit excluding an edge block candidate that is recognized as no necessity of image quality improving processing executed in image encoding processing from the detected edge block candidates and determining a remaining edge block candidate as edge block to be targeted in the image quality improving processing.

Claims

1. An image encoding apparatus, comprising:

a processor including;

a detection unit detecting edge blocks as blocks each including an edge in an image composed of plural blocks; and

a giving unit giving a priority of image quality improving processing which is executed with respect to the edge blocks in encoding processing of the image to each of the edge blocks detected, the priority corresponding to the number of blocks which have not been detected as the edge blocks by the detection unit and which are on a periphery of the each of the edge blocks detected.

2. The image encoding apparatus according to claim 1, wherein the image quality improving processing is executed for obtaining an image quality according to the priority.

3. The image encoding apparatus according to 1, wherein the edge block to which a predetermined priority is given is excluded from the edge blocks to be targeted in the image quality improving processing.

4. An image encoding method, comprising:

detecting edge blocks as blocks each including an edge in an image composed of plural blocks; and

giving a priority of image quality improving processing which is executed with respect to the edge blocks in encoding processing of the image to each of the edge blocks detected, the priority corresponding to the number of blocks which have not been detected as the edge blocks and which are on a periphery of the each of the detected edge blocks.

5. The image encoding method according to claim 4, wherein the image quality improving processing is executed for obtaining an image quality according to the priority.

6. The image encoding method according to claim 4, wherein the edge block to which a predetermined priority is given is excluded from the edge blocks to be targeted in the image quality improving processing.

7. A non-transitory recording medium on which a program executed by an information processor is recorded, the program comprising:

detecting edge blocks as blocks each including an edge in an image composed of plural blocks; and

giving a priority of image quality improving processing which is executed with respect to the edge blocks in encoding processing of the image to each of the edge blocks detected, the priority corresponding to the number of the blocks which have not been detected as the edge blocks and which are on a periphery of the each of the edge blocks detected.

8. The recording medium according to claim 7, wherein the edge block to which a predetermined priority is given is excluded from the edge blocks to be targeted in the image quality improving processing.