Invention Grant
US09277221B2 Image coding apparatus, method for coding image, program therefor, image decoding apparatus, method for decoding image, and program therefor
有权
图像编码装置，图像编码方法，其程序，图像解码装置，图像解码方法及其编程方法
- Patent Title: Image coding apparatus, method for coding image, program therefor, image decoding apparatus, method for decoding image, and program therefor
- Patent Title (中): 图像编码装置，图像编码方法，其程序，图像解码装置，图像解码方法及其编程方法
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Application No.: US14003776Application Date: 2012-02-27
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Publication No.: US09277221B2Publication Date: 2016-03-01
- Inventor: Mitsuru Maeda
- Applicant: Mitsuru Maeda
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon U.S.A., Inc. IP Division
- Priority: JP2011-051267 20110309
- International Application: PCT/JP2012/001319 WO 20120227
- International Announcement: WO2012/120823 WO 20120913
- Main IPC: G06K9/00
- IPC: G06K9/00 ; H04N19/50 ; H04N19/176 ; H04N19/61 ; H04N19/463 ; H04N19/124 ; H04N19/436
Abstract:
An image processing apparatus includes a division unit configured to divide an input image into a plurality of subblocks subjected to quantization control a subblock quantization parameter calculation unit configured to calculate a quantization parameter of each of the subblocks, a basic block quantization parameter calculation unit configured to set a basic block including at least two subblocks and to calculate a quantization parameter of the basic block, a difference value calculation unit configured to calculate a difference value between the quantization parameter of the basic block and the quantization parameter of each subblock included in the basic block, and a difference value coding unit configured to code the difference value.
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