Invention Grant
US08478060B2 Method and device for compressing an image and storage medium carrying an image compressed by said method
有权
用于压缩图像的携带由所述方法压缩的图像的存储介质的方法和装置
- Patent Title: Method and device for compressing an image and storage medium carrying an image compressed by said method
- Patent Title (中): 用于压缩图像的携带由所述方法压缩的图像的存储介质的方法和装置
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Application No.: US12735764Application Date: 2009-02-03
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Publication No.: US08478060B2Publication Date: 2013-07-02
- Inventor: Libo Yang , Zhi Bo Chen , Xiao Ming Huang
- Applicant: Libo Yang , Zhi Bo Chen , Xiao Ming Huang
- Applicant Address: FR Issy les Moulineaux
- Assignee: Thomson Licensing
- Current Assignee: Thomson Licensing
- Current Assignee Address: FR Issy les Moulineaux
- Agent Robert D. Shedd; Brian J. Dorini
- Priority: EP08300102 20080219
- International Application: PCT/EP2009/051200 WO 20090203
- International Announcement: WO2009/103614 WO 20090827
- Main IPC: G06K9/36
- IPC: G06K9/36

Abstract:
The invention is related to a method for compressing images. The proposed method comprises associating perceptual importance parameters with pixels of the image, applying a transform on the image, partitioning the transformed image into code blocks and encoding coefficient bits of a given code block together from a most significant bit plane towards a least significant bit plane, wherein encoding of at least one coefficient is truncated at a truncation bit plane depending on the perceptual importance parameter associated with the pixel to which said code block coefficient corresponds. Truncating encoding of coefficients in dependency on the perceptual importance of the pixel associated with the coefficient allows for truncating coefficients corresponding to perceptually less important pixels at more significant bit planes. So, the overall perceptual quality of the compressed image is enhanced.
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