IMAGE ENCODING METHOD AND IMAGE DECODING METHOD
To provide an image encoding device for performing intra-prediction in an image capable of highly maintaining the intra-prediction efficiency even when the block of the prediction unit is rectangular, an image decoding device, an image processing method, and an image processing program.SOLUTION: A v...
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Format | Patent |
Language | English Japanese |
Published |
05.11.2020
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Subjects | |
Online Access | Get full text |
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Summary: | To provide an image encoding device for performing intra-prediction in an image capable of highly maintaining the intra-prediction efficiency even when the block of the prediction unit is rectangular, an image decoding device, an image processing method, and an image processing program.SOLUTION: A video coding device 600 performs intra-prediction and encodes in units of blocks obtained by dividing an image in the image. When choosing the intra-prediction direction when a rectangular block is selected, a prediction direction determination unit 602 adds the prediction direction referring to the adjacent pixels of the left or upper block adjacent to the long side of the rectangular block when the prediction direction is inverted 180 degrees from the prediction directions referring to pixels adjacent to the short side of the rectangular block, to a selection target for the intra-prediction direction.SELECTED DRAWING: Figure 6
【課題】画像内でイントラ予測を行う画像符号化装置、画像復号装置、画像処理方法、及び画像処理プログラムに関し、予測単位のブロックが長方形でもイントラ予測効率を高く維持する。【解決手段】動画像符号化装置600は、画像内でその画像を分割したブロックを単位としてイントラ予測をし符号化を行う。予測方向判定部602は、長方形ブロックが選択された際のイントラ予測方向を選定する際に、長方形ブロックの短い辺に隣接する画素を参照する予測方向のうち、予測方向を180度反転したときに長方形ブロックの長い辺に隣接する左又は上のブロックの隣接画素を参照する予測方向を、イントラ予測方向の選定対象に加える。【選択図】図6 |
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Bibliography: | Application Number: JP20200128779 |