EQUIPMENT RELATED TO COLOR DEBANDING PROCESSING, IMAGE PROCESSING SYSTEM, PROCESSING PROGRAM, AND STORAGE MEDIUM
To solve the problem that the processing time is relatively long because it is optimization processing involving repetition and global processing using the entire image and it is not local processing to be performed while pixels are raster-scanned, so it was not suitable for video processing in whic...
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Main Author | |
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Format | Patent |
Language | English Japanese |
Published |
12.02.2021
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Subjects | |
Online Access | Get full text |
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Summary: | To solve the problem that the processing time is relatively long because it is optimization processing involving repetition and global processing using the entire image and it is not local processing to be performed while pixels are raster-scanned, so it was not suitable for video processing in which many images are required to be continuously processed.SOLUTION: A color debanding processing method is for performing local processing using pixels in a neighbor block area while raster-scanning an image. The color debanding processing method includes a step of detecting a banding candidate pixel from the standard deviation of luminance values in the neighbor block area of a pixel of interest, and a step of removing banding by using block pixels in the vicinity of the banding candidate pixel, increasing the weight for pixels that are similar in color and brightness, and performing weighted averaging of luminance signals.SELECTED DRAWING: Figure 1
【課題】反復を伴う最適化処理や画像全体を用いる大域的な処理であり、画素をラスタスキャンしながら行う局所的な処理ではないため、処理時間が比較的長く要するものとなるので、多くの映像を継続的に処理する必要がある映像処理には向かなかった。【解決手段】画像をラスタスキャンしながら、近傍ブロック領域における画素を用いた局所処理を行うカラーデバンディング処理方法において、注目画素の近傍ブロック領域中の輝度値の標準偏差からバンディング候補画素を検出する段階と、バンディング候補画素の近傍ブロック画素を用いて、できるだけ似た色で、明るさが近い画素に対する重みを大きくして、輝度信号の重み付け平均を行うことにより、バンディングを除去する段階と、を有するカラーデバンディング処理方法とする。【選択図】図1 |
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Bibliography: | Application Number: JP20200187757 |