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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

In the television apparatus 900 thus constructed, the decoder 904 has the functions of the image decoding apparatus described above. Therefore, when the decoder 904 decodes images in the television apparatus 90, the television apparatus 900 can display decoded images where the image quality is restrained from being lowered.

Second Application Example: Cellular Phone

FIG. 22 is a diagram illustrating, by way example, a general configuration of a cellular phone to which the embodiment described above is applied. The cellular phone 920 includes an antenna 921, a communication unit 922, an audio codec 923, a speaker 924, a microphone 925, a camera 926, an image processor 927, a demultiplexer 928, a recorder/reproducer 929, a display 930, a controller 931, an operating unit 932, and a bus 933.

The antenna 921 is connected to the communication unit 922. The speaker 924 and the microphone 925 are connected to the audio codec 923. The operating unit 932 is connected to the controller 931. The bus 933 interconnects the communication unit 922, the audio codec 923, the camera 926, the image processor 927, the demultiplexer 928, the recorder/reproducer 929, the display 930, and the controller 931.

The cellular phone 920 operates to send and receive audio signals, send and receive electronic mails or image data, capture images, and record data in various operation modes including a voice speech mode, a data communication mode, an image capturing mode, and a video telephone mode.

權(quán)利要求

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