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Image processing apparatus and image processing method for inhibiting application of an offset to pixels of an image

專利號
US11039133B2
公開日期
2021-06-15
申請人
SONY CORPORATION(JP Tokyo)
發(fā)明人
Yusuke Miyagi; Yoshitaka Morigami
IPC分類
H04N19/117; H04N19/157; H04N19/176; H04N19/42
技術(shù)領(lǐng)域
image,skip,prediction,offset,in,adaptive,filter,data,section,sao
地域: Tokyo

摘要

A filter processing section 352 performs a filter process for applying an offset to pixels of a decoded image. A filter controller 351 inhibits the offset from being applied to an edge portion depending on occurrence of a transform unit in a transformation skip mode in which orthogonal transformation is not performed on a predicted residual. Furthermore, the filter controller 351 determines whether an offset for gradation adjustment using the decoded image is to be applied in the filter processing section 352 or not, and sets an offset in case the offset is to be applied. It is possible to make less conspicuous in the boundary between a transform unit where orthogonal transformation is performed by the offset for gradation adjustment and the transform unit where orthogonal transformation is skipped. The image quality of the decoded image is restrained from being lowered.

說明書

The processing sequences described in the above description can be implemented by hardware, software, or a combination of both. In case the processing sequences are implemented by software, programs where the processing sequences are recorded are installed in a memory in a computer assembled in dedicated hardware, and are executed. Alternatively, the programs may be installed in a general-purpose computer that capable of performing various processes, and may be executed.

For example, the programs may be recorded in advance in a hard disk, an SSD (Solid State Drive), or a ROM (Read Only Memory) as a recording medium. Alternatively, the programs may be temporarily or permanently stored (recorded) in a removable recording medium such as a flexible disk, a CD-ROM (Compact Disc Read Only Memory), an MO (Magneto-Optical) disk, a DVD (Digital Versatile Disk), a BD (Blu-Ray Disc (registered trademark)), a magnetic disk, a semiconductor memory card, or the like. Such a removable recording medium may be provided as so-called package software.

Furthermore, the programs may be transferred from a download site to a computer via a wireless or wired link through a network such as a LAN (Local Area Network), the Internet, or the like, as well as being installed from a removable recording medium into the computer. The computer may receive the programs thus transferred and install the programs into a built-in recording medium such as a hard disk or the like.

權(quán)利要求

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