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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

FIG. 17 is a flowchart illustrating a case in which a prediction selecting operation and a transformation skip process determining operation are carried out in combination with each other.

FIG. 18 is a flowchart illustrating a case in which a prediction selecting operation is carried out depending on the existence of a TU of 4×4 pixels in a transformation skip mode.

FIG. 19 is a diagram illustrating a configuration of an image decoding apparatus.

FIG. 20 is a flowchart illustrating operation of the image decoding apparatus.

FIG. 21 is a diagram illustrating, by way of example, a general configuration of a television apparatus.

FIG. 22 is a diagram illustrating, by way of example, a general configuration of a cellular phone.

FIG. 23 is a diagram illustrating, by way of example, a general configuration of a recording and reproducing apparatus.

FIG. 24 is a diagram illustrating, by way of example, a general configuration of an image capturing apparatus.

DESCRIPTION OF EMBODIMENTS

Modes for carrying out the present technology will hereinafter be described below. The description will be given in the following order:

1. Configuration and Operation in Case Image Processing Apparatus Performs Coding Process

1-1. Configuration of Image Coding Apparatus

1-2. Operation of Image Coding Apparatus

權(quán)利要求

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